GNU bug report logs - #52692
27.2; wrong-type-argument in c-forward-decl-or-cast-1

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Simon Schubert <2-gnu <at> 0x2c.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.2; wrong-type-argument in c-forward-decl-or-cast-1
Date: Mon, 20 Dec 2021 15:18:33 -0800

Invoking c-context-line-break leads to wrong-type-argument if used with
a custom type, but not when used with a struct. See example below:


typedef struct some_type_struct {
   int some_field;
} some_type;

void foo(some_type t) {
}

void test(void) {
   foo((struct some_type_struct){ // fine: (c-context-line-break)
   });
   foo((some_type){ // error: (c-context-line-break)
   });
}



In GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw scroll 
bars)
of 2021-05-03 built on ernest
Repository revision: 930a410a9b054a61e004db3e0d35f1ff9b5f4796
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101001
System Description: Arch Linux

Recent messages:
Undo [2 times]
4 (#o4, #x4, ?\C-d)
Undo
Entering debugger...
Quit
user-error: No undo information in this buffer
Quit
Back to top level
Saving file /home/corecode/tmp/test.c...
Wrote /home/corecode/tmp/test.c

Configured using:
'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
--localstatedir=/var --with-x-toolkit=lucid --with-xft --without-gconf
--without-gsettings --with-modules
'--program-transform-name=s/^ctags$/ctags.emacs/' 'CFLAGS=-march=x86-64
-mtune=generic -O2 -pipe -fno-plt -g
-fdebug-prefix-map=/home/corecode/.cache/yay/emacs-lucid/src=/usr/src/debug' 

CPPFLAGS=-D_FORTIFY_SOURCE=2
LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now'

Configured features:
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LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS
LUCID X11 XDBE XIM MODULES THREADS LIBSYSTEMD JSON PDUMPER LCMS2 GMP

Important settings:
value of $LC_MONETARY: en_US.UTF-8
value of $LC_NUMERIC: en_US.UTF-8
value of $LC_TIME: en_GB.UTF-8
value of $LANG: en_DK.UTF-8
locale-coding-system: utf-8-unix

Major mode: C/*l

Minor modes in effect:
tooltip-mode: t
global-eldoc-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
abbrev-mode: t

Load-path shadows:
None found.

Features:
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Memory information:
((conses 16 78411 9583)
(symbols 48 9636 1)
(strings 32 26037 2235)
(string-bytes 1 929397)
(vectors 16 14770)
(vector-slots 8 185362 12374)
(floats 8 40 30)
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(buffers 1000 15))

Message #8 received at 52692 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Simon Schubert <2-gnu <at> 0x2c.org>
Cc: 52692 <at> debbugs.gnu.org
Subject: Re: bug#52692: 27.2; wrong-type-argument in c-forward-decl-or-cast-1
Date: Tue, 21 Dec 2021 12:20:03 +0100

Simon Schubert <2-gnu <at> 0x2c.org> writes:

> Invoking c-context-line-break leads to wrong-type-argument if used with
> a custom type, but not when used with a struct. See example below:
>
> typedef struct some_type_struct {
>    int some_field;
> } some_type;
>
> void foo(some_type t) {
> }
>
> void test(void) {
>    foo((struct some_type_struct){ // fine: (c-context-line-break)
>    });
>    foo((some_type){ // error: (c-context-line-break)
>    });
> }
>
> In GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw scroll
> bars)

I can reproduce this in Emacs 27.2, but not in Emacs 28, so it seems
like this problem is fixed for the next Emacs release, and I'm therefore
closing this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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