Subject: Re: bug#44850: 27.1; Emacs crash in font handling with font-backend ns

From: Pieter van Oostrum <[email-masked]>
Date: Wed, 25 Nov 2020 15:48:00 +0100

I compiled the emacs-27 branch from Git with debugging info, and here is the extended backtrace:

It seems that macfont_info->cache is NULL.

Thread 3 received signal SIGSEGV, Segmentation fault.
0x00000001004b3cab in macfont_get_glyph_for_character (font=0x1065d26a0, c=92) at macfont.m:1445
1445	      int nkeys_or_perm = cache->glyph.row_nkeys_or_perm[row];
(gdb) bt full
#0  0x00000001004b3cab in macfont_get_glyph_for_character (font=0x1065d26a0, c=92)
    at macfont.m:1445
        row = 0
        nkeys_or_perm = 0
        macfont_info = 0x1065d26a0
        macfont = 0x103ef6920
        cache = 0x0
#1  0x00000001004ac660 in macfont_encode_char (font=0x1065d26a0, c=92) at macfont.m:2741
        glyph = 0
#2  0x00000001000865cb in get_char_glyph_code (c=92, font=0x1065d26a0, char2b=0x7ffeefbfbed0)
    at xdisp.c:27605
        code = 0
#3  0x00000001000826df in gui_produce_glyphs (it=0x7ffeefbfbf70) at xdisp.c:29985
        stretched_p = false
        char2b = 0
        face = 0x1055cb450
        font = 0x1065d26a0
        pcm = 0x0
        boff = 0
        extra_line_spacing = 0
#4  0x000000010005bb7d in produce_special_glyphs (it=0x7ffeefbfd6f8, what=IT_CONTINUATION)
    at xdisp.c:29616
        temp_it = {
          window = XIL(0x106115225),
          w = 0x106115220,
          f = 0x106114630,
          method = GET_FROM_BUFFER,
          stop_charpos = 0,
          prev_stop = 0,
          base_level_stop = 0,
          end_charpos = 0,
          s = 0x0,
          string_nchars = 0,
          redisplay_end_trigger_charpos = 0,
          multibyte_p = true,
          tab_line_p = false,
          header_line_p = false,
          string_from_display_prop_p = false,
--Type <RET> for more, q to quit, c to continue without paging--c
          string_from_prefix_prop_p = false,
          from_disp_prop_p = false,
          ellipsis_p = false,
          avoid_cursor_p = false,
          dp = 0x0,
          dpvec = 0x0,
          dpend = 0x0,
          dpvec_char_len = 0,
          dpvec_face_id = 0,
          saved_face_id = 0,
          ctl_chars = {XIL(0) <repeats 16 times>},
          start = {
            pos = {
              charpos = 0,
              bytepos = 0
            },
            overlay_string_index = 0,
            string_pos = {
              charpos = 0,
              bytepos = 0
            },
            dpvec_index = 0
          },
          current = {
            pos = {
              charpos = 0,
              bytepos = 0
            },
            overlay_string_index = 0,
            string_pos = {
              charpos = 0,
              bytepos = 0
            },
            dpvec_index = 0
          },
          n_overlay_strings = 0,
          overlay_strings_charpos = 0,
          overlay_strings = {XIL(0) <repeats 16 times>},
          string_overlays = {XIL(0) <repeats 16 times>},
          string = XIL(0),
          from_overlay = XIL(0),
          stack = {{
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }, {
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }, {
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }, {
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }, {
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }},
          sp = 0,
          selective = 0,
          what = IT_CHARACTER,
          face_id = 0,
          selective_display_ellipsis_p = true,
          ctl_arrow_p = true,
          face_box_p = false,
          start_of_box_run_p = false,
          end_of_box_run_p = false,
          overlay_strings_at_end_processed_p = false,
          ignore_overlay_strings_at_pos_p = false,
          glyph_not_available_p = false,
          starts_in_middle_of_char_p = false,
          face_before_selective_p = false,
          constrain_row_ascent_descent_p = false,
          line_number_produced_p = false,
          line_wrap = WINDOW_WRAP,
          base_face_id = 0,
          c = 92,
          len = 1,
          cmp_it = {
            stop_pos = 0,
            id = -1,
            ch = 0,
            rule_idx = 0,
            lookback = 0,
            nglyphs = 0,
            reversed_p = false,
            charpos = 0,
            nchars = 0,
            nbytes = 0,
            from = 0,
            to = 0,
            width = 0
          },
          char_to_display = 92,
          glyphless_method = GLYPHLESS_DISPLAY_THIN_SPACE,
          image_id = 0,
          xwidget = 0x0,
          slice = {
            x = XIL(0),
            y = XIL(0),
            width = XIL(0),
            height = XIL(0)
          },
          space_width = XIL(0),
          voffset = 0,
          tab_width = 8,
          font_height = XIL(0),
          object = XIL(0),
          position = {
            charpos = 0,
            bytepos = 0
          },
          truncation_pixel_width = 0,
          continuation_pixel_width = 0,
          first_visible_x = 0,
          last_visible_x = 0,
          last_visible_y = 0,
          extra_line_spacing = 0,
          max_extra_line_spacing = 0,
          override_ascent = -1,
          override_descent = 0,
          override_boff = 0,
          glyph_row = 0x0,
          area = LEFT_MARGIN_AREA,
          nglyphs = 1,
          pixel_width = 0,
          ascent = 12,
          descent = 4,
          max_ascent = 0,
          max_descent = 0,
          phys_ascent = 0,
          phys_descent = 0,
          max_phys_ascent = 0,
          max_phys_descent = 0,
          current_x = 0,
          continuation_lines_width = 0,
          eol_pos = {
            charpos = 0,
            bytepos = 0
          },
          current_y = 0,
          first_vpos = 0,
          vpos = 0,
          hpos = 0,
          lnum = 0,
          lnum_bytepos = 0,
          lnum_width = 0,
          lnum_pixel_width = 0,
          pt_lnum = 0,
          tab_offset = 0,
          left_user_fringe_bitmap = 0,
          right_user_fringe_bitmap = 0,
          left_user_fringe_face_id = 0,
          right_user_fringe_face_id = 0,
          bidi_p = false,
          bidi_it = {
            bytepos = 0,
            charpos = 0,
            ch = 0,
            nchars = 0,
            ch_len = 0,
            type = UNKNOWN_BT,
            type_after_wn = UNKNOWN_BT,
            orig_type = UNKNOWN_BT,
            resolved_level = 0 '\000',
            isolate_level = 0 '\000',
            invalid_levels = 0,
            invalid_isolates = 0,
            prev = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            last_strong = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            next_for_neutral = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            prev_for_neutral = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            next_for_ws = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            bracket_pairing_pos = 0,
            bracket_enclosed_type = UNKNOWN_BT,
            next_en_pos = 0,
            next_en_type = UNKNOWN_BT,
            sos = NEUTRAL_DIR,
            scan_dir = 0,
            disp_pos = 0,
            disp_prop = 0,
            stack_idx = 0,
            level_stack = {{
                next_for_neutral_pos = 0,
                next_for_neutral_type = 0,
                last_strong_type = 0,
                prev_for_neutral_type = 0,
                level = 0 '\000',
                flags = 0 '\000'
              } <repeats 128 times>},
            string = {
              lstring = XIL(0),
              s = 0x0,
              schars = 0,
              bufpos = 0,
              from_disp_str = false,
              unibyte = false
            },
            w = 0x106115220,
            paragraph_dir = NEUTRAL_DIR,
            separator_limit = 0,
            first_elt = false,
            new_paragraph = false,
            frame_window_p = false
          },
          paragraph_embedding = L2R
        }
        gc = XIL(0)
        glyph = {
          ch = 92,
          face_id = 0
        }
#5  0x000000010005a159 in init_iterator (it=0x7ffeefbfd6f8, w=0x106115220, charpos=1, bytepos=1, row=0x0, base_face_id=DEFAULT_FACE_ID) at xdisp.c:3198
        remapped_base_face_id = DEFAULT_FACE_ID
        body_width = 0
        body_height = 0
#6  0x000000010006915c in resize_mini_window (w=0x106115220, exact_p=true) at xdisp.c:11670
        unit = 16
        max_height = 0
        old_current_buffer = 0x0
        it = {
          window = XIL(0x106115225),
          w = 0x106115220,
          f = 0x106114630,
          method = GET_FROM_BUFFER,
          stop_charpos = 0,
          prev_stop = 0,
          base_level_stop = 0,
          end_charpos = 0,
          s = 0x0,
          string_nchars = 0,
          redisplay_end_trigger_charpos = 0,
          multibyte_p = true,
          tab_line_p = false,
          header_line_p = false,
          string_from_display_prop_p = false,
          string_from_prefix_prop_p = false,
          from_disp_prop_p = false,
          ellipsis_p = false,
          avoid_cursor_p = false,
          dp = 0x0,
          dpvec = 0x0,
          dpend = 0x0,
          dpvec_char_len = 0,
          dpvec_face_id = 0,
          saved_face_id = 0,
          ctl_chars = {XIL(0) <repeats 16 times>},
          start = {
            pos = {
              charpos = 0,
              bytepos = 0
            },
            overlay_string_index = 0,
            string_pos = {
              charpos = 0,
              bytepos = 0
            },
            dpvec_index = 0
          },
          current = {
            pos = {
              charpos = 0,
              bytepos = 0
            },
            overlay_string_index = -1,
            string_pos = {
              charpos = -1,
              bytepos = -1
            },
            dpvec_index = -1
          },
          n_overlay_strings = 0,
          overlay_strings_charpos = 0,
          overlay_strings = {XIL(0) <repeats 16 times>},
          string_overlays = {XIL(0) <repeats 16 times>},
          string = XIL(0),
          from_overlay = XIL(0),
          stack = {{
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }, {
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }, {
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }, {
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }, {
              string = XIL(0),
              string_nchars = 0,
              end_charpos = 0,
              stop_charpos = 0,
              prev_stop = 0,
              base_level_stop = 0,
              cmp_it = {
                stop_pos = 0,
                id = 0,
                ch = 0,
                rule_idx = 0,
                lookback = 0,
                nglyphs = 0,
                reversed_p = false,
                charpos = 0,
                nchars = 0,
                nbytes = 0,
                from = 0,
                to = 0,
                width = 0
              },
              face_id = 0,
              u = {
                image = {
                  object = XIL(0),
                  slice = {
                    x = XIL(0),
                    y = XIL(0),
                    width = XIL(0),
                    height = XIL(0)
                  },
                  image_id = 0
                },
                stretch = {
                  object = XIL(0)
                },
                xwidget = {
                  object = XIL(0)
                }
              },
              position = {
                charpos = 0,
                bytepos = 0
              },
              current = {
                pos = {
                  charpos = 0,
                  bytepos = 0
                },
                overlay_string_index = 0,
                string_pos = {
                  charpos = 0,
                  bytepos = 0
                },
                dpvec_index = 0
              },
              from_overlay = XIL(0),
              area = LEFT_MARGIN_AREA,
              method = GET_FROM_BUFFER,
              paragraph_embedding = NEUTRAL_DIR,
              multibyte_p = false,
              string_from_display_prop_p = false,
              string_from_prefix_prop_p = false,
              display_ellipsis_p = false,
              avoid_cursor_p = false,
              bidi_p = false,
              from_disp_prop_p = false,
              line_wrap = TRUNCATE,
              voffset = 0,
              space_width = XIL(0),
              font_height = XIL(0)
            }},
          sp = 0,
          selective = 0,
          what = IT_CHARACTER,
          face_id = 0,
          selective_display_ellipsis_p = true,
          ctl_arrow_p = true,
          face_box_p = false,
          start_of_box_run_p = false,
          end_of_box_run_p = false,
          overlay_strings_at_end_processed_p = false,
          ignore_overlay_strings_at_pos_p = false,
          glyph_not_available_p = false,
          starts_in_middle_of_char_p = false,
          face_before_selective_p = false,
          constrain_row_ascent_descent_p = false,
          line_number_produced_p = false,
          line_wrap = WINDOW_WRAP,
          base_face_id = 0,
          c = 0,
          len = 0,
          cmp_it = {
            stop_pos = 0,
            id = -1,
            ch = 0,
            rule_idx = 0,
            lookback = 0,
            nglyphs = 0,
            reversed_p = false,
            charpos = 0,
            nchars = 0,
            nbytes = 0,
            from = 0,
            to = 0,
            width = 0
          },
          char_to_display = 0,
          glyphless_method = GLYPHLESS_DISPLAY_THIN_SPACE,
          image_id = 0,
          xwidget = 0x0,
          slice = {
            x = XIL(0),
            y = XIL(0),
            width = XIL(0),
            height = XIL(0)
          },
          space_width = XIL(0),
          voffset = 0,
          tab_width = 8,
          font_height = XIL(0),
          object = XIL(0),
          position = {
            charpos = 0,
            bytepos = 0
          },
          truncation_pixel_width = 0,
          continuation_pixel_width = 0,
          first_visible_x = 0,
          last_visible_x = 0,
          last_visible_y = 0,
          extra_line_spacing = 0,
          max_extra_line_spacing = 0,
          override_ascent = -1,
          override_descent = 0,
          override_boff = 0,
          glyph_row = 0x0,
          area = LEFT_MARGIN_AREA,
          nglyphs = 0,
          pixel_width = 0,
          ascent = 0,
          descent = 0,
          max_ascent = 0,
          max_descent = 0,
          phys_ascent = 0,
          phys_descent = 0,
          max_phys_ascent = 0,
          max_phys_descent = 0,
          current_x = 0,
          continuation_lines_width = 0,
          eol_pos = {
            charpos = 0,
            bytepos = 0
          },
          current_y = 0,
          first_vpos = 0,
          vpos = 0,
          hpos = 0,
          lnum = 0,
          lnum_bytepos = 0,
          lnum_width = 0,
          lnum_pixel_width = 0,
          pt_lnum = 0,
          tab_offset = 0,
          left_user_fringe_bitmap = 0,
          right_user_fringe_bitmap = 0,
          left_user_fringe_face_id = 0,
          right_user_fringe_face_id = 0,
          bidi_p = false,
          bidi_it = {
            bytepos = 0,
            charpos = 0,
            ch = 0,
            nchars = 0,
            ch_len = 0,
            type = UNKNOWN_BT,
            type_after_wn = UNKNOWN_BT,
            orig_type = UNKNOWN_BT,
            resolved_level = 0 '\000',
            isolate_level = 0 '\000',
            invalid_levels = 0,
            invalid_isolates = 0,
            prev = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            last_strong = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            next_for_neutral = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            prev_for_neutral = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            next_for_ws = {
              charpos = 0,
              type = UNKNOWN_BT,
              orig_type = UNKNOWN_BT
            },
            bracket_pairing_pos = 0,
            bracket_enclosed_type = UNKNOWN_BT,
            next_en_pos = 0,
            next_en_type = UNKNOWN_BT,
            sos = NEUTRAL_DIR,
            scan_dir = 0,
            disp_pos = 0,
            disp_prop = 0,
            stack_idx = 0,
            level_stack = {{
                next_for_neutral_pos = 0,
                next_for_neutral_type = 0,
                last_strong_type = 0,
                prev_for_neutral_type = 0,
                level = 0 '\000',
                flags = 0 '\000'
              } <repeats 128 times>},
            string = {
              lstring = XIL(0),
              s = 0x0,
              schars = 0,
              bufpos = 0,
              from_disp_str = false,
              unibyte = false
            },
            w = 0x106115220,
            paragraph_dir = NEUTRAL_DIR,
            separator_limit = 0,
            first_elt = false,
            new_paragraph = false,
            frame_window_p = false
          },
          paragraph_embedding = L2R
        }
        height = 0
        start = {
          charpos = 1,
          bytepos = 4364114659
        }
        windows_height = 736
        f = 0x106114630
        old_height = 16
#7  0x0000000100065215 in resize_mini_window_1 (a1=4396765728, exactly=XIL(0x30)) at xdisp.c:11607
        i1 = 4396765728
#8  0x0000000100065099 in with_echo_area_buffer (w=0x106115220, which=0, fn=0x1000651c0 <resize_mini_window_1>, a1=4396765728, a2=XIL(0x30)) at xdisp.c:11327
        buffer = XIL(0x103ef7e65)
        this_one = false
        the_other = true
        clear_buffer_p = false
        rc = false
        count = 3
#9  0x0000000100064b7c in resize_echo_area_exactly () at xdisp.c:11585
        w = 0x106115220
        resize_exactly = XIL(0x30)
        resized_p = false
#10 0x00000001001c72be in command_loop_1 () at keyboard.c:1262
        prev_modiff = 0
        prev_buffer = 0x0
        already_adjusted = false
#11 0x000000010030e14f in internal_condition_case (bfun=0x1001c70d0 <command_loop_1>, handlers=XIL(0x90), hfun=0x1001ea7a0 <cmd_error>) at eval.c:1356
        val = XIL(0x90)
        c = 0x103e16ce0
#12 0x00000001001ea681 in command_loop_2 (ignore=XIL(0)) at keyboard.c:1091
        val = XIL(0x103e16bf0)
#13 0x000000010030d288 in internal_catch (tag=XIL(0xc450), func=0x1001ea650 <command_loop_2>, arg=XIL(0)) at eval.c:1117
        val = XIL(0x100a38d10)
        c = 0x103e16bf0
#14 0x00000001001c6145 in command_loop () at keyboard.c:1070
No locals.
#15 0x00000001001c5f17 in recursive_edit_1 () at keyboard.c:714
        count = 1
        val = XIL(0x1003045e5)
#16 0x00000001001c63c6 in Frecursive_edit () at keyboard.c:786
        count = 0
        buffer = XIL(0)
#17 0x00000001001c2f23 in main (argc=1, argv=0x7ffeefbff830) at emacs.c:2066
        stack_bottom_variable = 0x0
        do_initial_setlocale = true
        no_loadup = false
        junk = 0x0
        dname_arg = 0x0
        dname_arg2 = "\000\370\277\357\376\177\000\000\324\003\274\000\001\000\000\000\030\370\277\357\376\177\000\000\000\000\000\000\001\000\000\000\060\370\277\357\376\177\000\000\030\370\277\357\376\177\000\000 \365\273\000\001\000\000\000\000\000\000\000\001\000\000\000H\362\273\000\001\000\000\000\000\000\000\000\000\000\000"
        ch_to_dir = 0x0
        original_pwd = 0x0
        dump_mode = 0x0
        skip_args = 0
        temacs = 0x0
        attempt_load_pdump = true
        rlim = {
          rlim_cur = 10022912,
          rlim_max = 67104768
        }
        sockfd = -1
        module_assertions = false
[New Thread 0x264b of process 81035]
(gdb) xbacktrace
[New Thread 0x1b17 of process 81035]
[New Thread 0x1a07 of process 81035]
(gdb) 
-- 
Pieter van Oostrum
www: http://pieter.vanoostrum.org/
PGP key: [8DAE142BE17999C4]