https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123281
Bug ID: 123281
Summary: [16 Regression] ICE using gcc 20251221 snapshot with
openscad-2025.05.01_pre-r1
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ted.d.rodgers at gmail dot com
Target Milestone: ---
Created attachment 63141
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63141&action=edit
reduced ii file
Attached reduced OffscreenContextGLX.cc.ii and OffscreenContextGLX.cc.ii.orig
errors with gcc-16:
g++-16 -c OffscreenContextGLX.cc.ii -pipe -frounding-math -std=c++17
-frounding-math -mno-direct-extern-access -o OffscreenContextGLX.cc.o
but builds corerctly using gcc-15:
g++-15 -c OffscreenContextGLX.cc.ii -pipe -frounding-math -std=c++17
-frounding-math -mno-direct-extern-access -o OffscreenContextGLX.cc.o
OffscreenContextGLX.cc.ii:4:1: internal compiler error: Segmentation fault
4 | };
| ^
0x5645b84edba7 internal_error(char const*, ...)
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/diagnostic-global-context.cc:787
0x5645b66499ba crash_signal
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/toplev.cc:325
0x7f017ea4523f ???
/usr/src/debug/sys-libs/glibc-2.42-r3/glibc-2.42/signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0
0x5645b59e2844 tree_check(tree_node*, char const*, int, char const*, tree_code)
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/tree.h:3759
0x5645b59e2844 inline_needs_template_parms
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/pt.cc:483
0x5645b59e2844 maybe_begin_member_template_processing(tree_node*)
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/pt.cc:558
0x5645b5979f7b cp_parser_class_specifier
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:29017
0x5645b59344fc cp_parser_type_specifier
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:21467
0x5645b5934ba6 cp_parser_decl_specifier_seq
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:18038
0x5645b596a623 cp_parser_single_declaration
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:35277
0x5645b596ac94 cp_parser_template_declaration_after_parameters
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:35034
0x5645b5945265 cp_parser_explicit_template_declaration
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:35208
0x5645b5945265 cp_parser_template_declaration_after_export
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:35227
0x5645b5945265 cp_parser_template_declaration
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:19654
0x5645b5917289 cp_parser_declaration
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:16796
0x5645b59eb426 cp_parser_toplevel_declaration
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:16900
0x5645b59eb426 cp_parser_translation_unit
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:5559
0x5645b59eb426 c_parse_file()
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/cp/parser.cc:56314
0x5645b5bb5d80 c_common_parse_file()
/usr/src/debug/sys-devel/gcc-16.0.0_p20251221/gcc-16-20251221/gcc/c-family/c-opts.cc:1422
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
