https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67106
Bug ID: 67106
Summary: [6 Regression] ICE: verify_type failed: type variant
differs by TYPE_PACKED. with -g -fpack-struct
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Created attachment 36114
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36114&action=edit
reduced testcase
Compiler output:
$ /mnt/svn/gcc-trunk/binary-latest/bin/gcc -g -fpack-struct testcase.c
testcase.c:8:3: error: type variant differs by TYPE_PACKED.
};
^
<record_type 0x7fdaa76b7f18 S packed type_0 VOID
align 8 symtab -1486058768 alias set -1 canonical type 0x7fdaa76b7f18
pointer_to_this <pointer_type 0x7fdaa76da348> chain <type_decl
0x7fdaa75ccd10 D.1755>>
<record_type 0x7fdaa76da000 S VOID
align 8 symtab -1486058848 alias set -1 canonical type 0x7fdaa76b7f18
pointer_to_this <pointer_type 0x7fdaa76da2a0> chain <type_decl
0x7fdaa75ccd10 D.1755>>
testcase.c:8:3: internal compiler error: verify_type failed
0xeb4379 verify_type(tree_node const*)
/mnt/svn/gcc-trunk/gcc/tree.c:13570
0x7c3d34 gen_type_die_with_usage
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:20685
0x7c44c5 gen_type_die_with_usage
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:20783
0x7c5516 gen_type_die
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:20879
0x7d354d gen_decl_die
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:21519
0x7c2fcd gen_member_die
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:20356
0x7c2fcd gen_struct_or_union_type_die
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:20461
0x7c2fcd gen_tagged_type_die
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:20662
0x7c483d gen_type_die_with_usage
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:20824
0x7c5516 gen_type_die
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:20879
0x7d3a79 gen_decl_die
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:21465
0x7d4594 dwarf2out_decl
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:21915
0x7d486b dwarf2out_type_decl
/mnt/svn/gcc-trunk/gcc/dwarf2out.c:21625
0xb187ef rest_of_type_compilation(tree_node*, int)
/mnt/svn/gcc-trunk/gcc/passes.c:336
0x5d4cf3 finish_struct(unsigned int, tree_node*, tree_node*, tree_node*,
c_struct_parse_info*)
/mnt/svn/gcc-trunk/gcc/c/c-decl.c:7849
0x611a4e c_parser_struct_or_union_specifier
/mnt/svn/gcc-trunk/gcc/c/c-parser.c:2812
0x611a4e c_parser_declspecs
/mnt/svn/gcc-trunk/gcc/c/c-parser.c:2387
0x60fc2b c_parser_struct_declaration
/mnt/svn/gcc-trunk/gcc/c/c-parser.c:2896
0x6119b7 c_parser_struct_or_union_specifier
/mnt/svn/gcc-trunk/gcc/c/c-parser.c:2786
0x6119b7 c_parser_declspecs
/mnt/svn/gcc-trunk/gcc/c/c-parser.c:2387
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$ /mnt/svn/gcc-trunk/binary-latest/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/mnt/svn/gcc-trunk/binary-latest/bin/gcc
COLLECT_LTO_WRAPPER=/mnt/svn/gcc-trunk/binary-226486-lto-fortran-checking-yes-rtl-df/libexec/gcc/x86_64-pc-linux-gnu/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /mnt/svn/gcc-trunk//configure --enable-checking=yes,rtl,df
--enable-languages=c,c++,lto,fortran
--prefix=/mnt/svn/gcc-trunk/binary-226486-lto-fortran-checking-yes-rtl-df/
--without-cloog --without-ppl --without-isl
Thread model: posix
gcc version 6.0.0 20150803 (experimental) (GCC)
-freport-bug fails here:
$ /mnt/svn/gcc-trunk/binary-latest/bin/gcc -freport-bug -g -fpack-struct
testcase.c
testcase.c:8:3: error: type variant differs by TYPE_PACKED.
};
...
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
The bug is not reproducible, so it is likely a hardware or OS problem.
Is this behavior expected? It reproduces everytime for me.
Tested revisions:
r226486 - ICE
gcc-5-branch r225803 - OK
