https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91416
Bug ID: 91416
Summary: ICE in cp_check_const_attributes, at cp/decl2.c:1408
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: p.vanhoof at oma dot be
Target Milestone: ---
Created attachment 46698
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46698&action=edit
code that triggers the ICE
The attached code ICEs with the following build of the trunk:
% g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/local/gcc1000/lib/gcc/x86_64-pc-linux-gnu/10.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-mainline/configure --prefix=/usr/local/gcc1000
--enable-languages=c,c++,fortran
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 10.0.0 20190804 (experimental) (GCC)
This is r274099.
The command to trigger the ICE is:
% g++ -g -c bug.cc
The output is:
bug.cc:11:3: internal compiler error: tree check: expected tree_list, have
ggc_freed in cp_check_const_attributes, at cp/decl2.c:1408
11 | } ql;
| ^~
0x7f5a7b tree_check_failed(tree_node const*, char const*, int, char const*,
...)
../../gcc-mainline/gcc/tree.c:9905
0x61da78 tree_check(tree_node*, char const*, int, char const*, tree_code)
../../gcc-mainline/gcc/tree.h:3257
0x61da78 cp_check_const_attributes(tree_node*)
../../gcc-mainline/gcc/cp/decl2.c:1408
0x959148 cp_check_const_attributes(tree_node*)
../../gcc-mainline/gcc/cp/decl2.c:1401
0x959148 cplus_decl_attributes(tree_node**, tree_node*, int)
../../gcc-mainline/gcc/cp/decl2.c:1565
0x9489f8 start_decl(cp_declarator const*, cp_decl_specifier_seq*, int,
tree_node*, tree_node*, tree_node**)
../../gcc-mainline/gcc/cp/decl.c:5167
0x9edfbf cp_parser_init_declarator
../../gcc-mainline/gcc/cp/parser.c:20374
0x9d06ce cp_parser_simple_declaration
../../gcc-mainline/gcc/cp/parser.c:13541
0x9f4e01 cp_parser_declaration
../../gcc-mainline/gcc/cp/parser.c:13238
0x9f5580 cp_parser_translation_unit
../../gcc-mainline/gcc/cp/parser.c:4709
0x9f5580 c_parse_file()
../../gcc-mainline/gcc/cp/parser.c:41688
0xaff99b c_common_parse_file()
../../gcc-mainline/gcc/c-family/c-opts.c:1160
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
The attached code compiles correctly with g++ 9.1.0.
Unfortunately this appears to be a heisenbug. I tried generating the
preprocessed file with -save-temps, but the ICE goes away when using that file
(or even when generating the file). So I can only hope you can reproduce it
with the attached file... Let me know if there is anything else I can do.
