Here they are: (gdb) p *(char **)0x8f68108 $1 = 0x2018b608 "/nix/store/xdxaa55akicvs3jjrr8d7nmzla4gzbyl-emacs-30.1/lib/emacs/30.1/native-lisp/30.1-1ed0c1e8/cl-print-79bf9fb1-14d0e7d5.eln" (gdb) x/32gx 0x9e7980 0x9e7980 : 0x0000000000000000 0x0000000000000000 0x9e7990 : 0x0000000000000000 0x0000000000000000 0x9e79a0 : 0x0000000000000000 0x0000000000000000 0x9e79b0 : 0x0000000000000000 0x0000000000000000 0x9e79c0 : 0x0000000000000000 0x0000000000000000 0x9e79d0 : 0x0000000000000000 0x0000000000000000 0x9e79e0 : 0x0000000000000000 0x0000000000000000 0x9e79f0 : 0x0000000000000000 0x0000000000000000 0x9e7a00 : 0x0000000000000000 0x0000000000000000 0x9e7a10 : 0x0000000000000000 0x0000000000000000 0x9e7a20 : 0x0000000000000000 0x0000000000000000 0x9e7a30 : 0x0000000000000000 0x0000000000000000 0x9e7a40 : 0x0000000000000000 0x0000000000000000 0x9e7a50 : 0x0000000000000000 0x0000000000000000 0x9e7a60 : 0x0000000000000000 0x0000000000000000 0x9e7a70 : 0x0000000000000000 0x0000000000000000 (gdb) p *(char **)0x8ae5588 p *(char **)0x15554ec0ff78$2 = 0x2018b6b8 "/nix/store/xdxaa55akicvs3jjrr8d7nmzla4gzbyl-emacs-30.1/share/emacs/30.1/lisp/emacs-lisp/cl-print.elc" (gdb) p *(char **)0x15554ec0ff98 $3 = 0x15554f56d92e "cl-print" (gdb) p *(char **)0x15554ec0ff78 $4 = 0x15554f56d81f "Print OBJECT on STREAM according to its type.\nOutput is further controlled by the variables\n`cl-print-readably', `cl-print-compiled', along with output\nvariables for the standard printing functions. "... (gdb) x/32gx 0x38294c8 0x38294c8: 0xc00000001200a000 0x000015553389a350 0x38294d8: 0x0000000000020001 0x00000000088417d0 0x38294e8: 0x0000000000000000 0x0000000000000000 0x38294f8: 0x0000000000000025 0x00000000098e7985 0x3829508: 0x000000000e754ab0 0x0000000000000000 0x3829518: 0x000000001f6463e3 0x400000001200a000 0x3829528: 0x000015553389a590 0x0000000000010001 0x3829538: 0x0000000004d5eb30 0x0000000000000000 0x3829548: 0x0000000000000000 0x0000000000000026 0x3829558: 0x00000000098e7985 0x000000000e754ae0 0x3829568: 0x0000000000000000 0x000000001f646373 0x3829578: 0x400000001200a000 0x000015553389a6a0 0x3829588: 0x0000000000030003 0x000000000e754b30 0x3829598: 0x0000000000000000 0x0000000000000000 0x38295a8: 0x0000000000000027 0x00000000098e7985 0x38295b8: 0x000000001fe4ed90 0x0000000000000000 (gdb) Thanks! George On Mon, May 19, 2025 at 11:44 AM Pip Cet wrote: > "George P" writes: > > > Can you please run x/64gx 0x3aa1ac0 so we can be sure > > of this? > > > > Sure: > > > > (gdb) x/64gx 0x3aa1ac0 > > 0x3aa1ac0: 0x00000000098f1d0d 0x0000000000000030 > > 0x3aa1ad0: 0x00000000098f1d65 0x0000000000000030 > > 0x3aa1ae0: 0x00000000098f1dbd 0x0000000000000030 > > 0x3aa1af0: 0x00000000098f1e15 0x0000000000000030 > > 0x3aa1b00: 0x00000000098f1e6d 0x0000000000000030 > > 0x3aa1b10: 0x00000000098f1ec5 0x0000000000000030 > > 0x3aa1b20: 0x00000000098f1f1d 0x0000000000000030 > > 0x3aa1b30: 0x00000000098f1f75 0x0000000000000030 > > 0x3aa1b40: 0x00000000098f1fcd 0x0000000000000030 > > 0x3aa1b50: 0x00000000098f2025 0x0000000000000030 > > 0x3aa1b60: 0x00000000098f207d 0x0000000000000030 > > 0x3aa1b70: 0x00000000098f20d5 0x0000000000000030 > > 0x3aa1b80: 0x00000000098f212d 0x0000000000000030 > > 0x3aa1b90: 0x00000000098f2185 0x0000000000000030 > > 0x3aa1ba0: 0x00000000098f21dd 0x0000000000000030 > > 0x3aa1bb0: 0x00000000098f2235 0x0000000000000030 > > 0x3aa1bc0: 0x00000000098f228d 0x0000000000000030 > > 0x3aa1bd0: 0x00000000098f22e5 0x0000000000000030 > > 0x3aa1be0: 0x00000000098f233d 0x0000000000000030 > > 0x3aa1bf0: 0x00000000098f2395 0x0000000000000030 > > 0x3aa1c00: 0x00000000098f23ed 0x0000000000000030 > > 0x3aa1c10: 0x00000000098f2445 0x0000000000000030 > > 0x3aa1c20: 0x00000000098f249d 0x0000000000000030 > > 0x3aa1c30: 0x00000000098f24f5 0x0000000000000030 > > 0x3aa1c40: 0x00000000098f254d 0x0000000000000030 > > 0x3aa1c50: 0x00000000098f25a5 0x0000000000000030 > > 0x3aa1c60: 0x0000000000000007 0x0000000000000007 > > 0x3aa1c70: 0x0000000000000007 0x0000000000000007 > > 0x3aa1c80: 0x0000000000000007 0x0000000000000007 > > 0x3aa1c90: 0x0000000000000007 0x0000000000000007 > > 0x3aa1ca0: 0x0000000000000007 0x0000000000000007 > > 0x3aa1cb0: 0x0000000000000007 0x0000000000000007 > > (gdb) > > That's a native comp unit's lambda_gc_guard_h, which is quite curious. > Presumably 0x98e7985 is the native comp unit and 0x8f680f4 is its file > name, so could you please run > > p *(char **)0x8f68108 > > to retrieve it, as well as > > x/32gx 0x9e7980 > > to confirm it is (or was) a native comp unit? > > Going back through the last_marked array, it seems we're looking at the > 'function-history plist property of a symbol at 0x15554df1a3a0, but I'm > not sure which of the strings we mark after that is its name. Best to > print all of them: > > p *(char **)0x8ae5588 > p *(char **)0x15554ec0ff98 > p *(char **)0x15554ec0ff78 > > The last vector or pseudovector we marked before that was 0x38294cd, so > I think we should look at > > x/32gx 0x38294c8 > > too. > > > Keep them coming! Are you still suspecting X? > > Currently, it seems more likely to involve the nativecomp code, but I've > stared at it for a while and I don't see how it can resurrect comp units > once they become unreachable. > > Thanks again! > > Pip > >