[Bug c++/83060] New: ICE on valid C++ code: in ignore_overflows, at cp/cvt.c:583

[su at cs dot ucdavis.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83060

            Bug ID: 83060
           Summary: ICE on valid C++ code: in ignore_overflows, at
                    cp/cvt.c:583
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu
  Target Milestone: ---

It affects at least all versions as early as 4.8.x.

$ g++tk -v
Using built-in specs.
COLLECT_GCC=g++tk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.0 20171119 (experimental) [trunk revision 254940] (GCC)
$
$ clang++ -c tmp.cpp
$ icc -c tmp.cpp
$
$ g++tk -c tmp.cpp
tmp.cpp:7:37: internal compiler error: in ignore_overflows, at cp/cvt.c:583
 int b = __builtin_offsetof (A, s[-1]);
                                     ^
0x72ac8d ignore_overflows
        ../../gcc-source-trunk/gcc/cp/cvt.c:583
0x72d428 ocp_convert(tree_node*, tree_node*, int, int, int)
        ../../gcc-source-trunk/gcc/cp/cvt.c:817
0x80ef06 cp_parser_builtin_offsetof
        ../../gcc-source-trunk/gcc/cp/parser.c:9930
0x80ef06 cp_parser_primary_expression
        ../../gcc-source-trunk/gcc/cp/parser.c:5335
0x8103dd cp_parser_postfix_expression
        ../../gcc-source-trunk/gcc/cp/parser.c:7022
0x82b97c cp_parser_unary_expression
        ../../gcc-source-trunk/gcc/cp/parser.c:8363
0x7fafcc cp_parser_cast_expression
        ../../gcc-source-trunk/gcc/cp/parser.c:9131
0x7fb733 cp_parser_binary_expression
        ../../gcc-source-trunk/gcc/cp/parser.c:9232
0x7fc020 cp_parser_assignment_expression
        ../../gcc-source-trunk/gcc/cp/parser.c:9519
0x7fd0f3 cp_parser_constant_expression
        ../../gcc-source-trunk/gcc/cp/parser.c:9803
0x7fd9c7 cp_parser_initializer_clause
        ../../gcc-source-trunk/gcc/cp/parser.c:21978
0x8007d3 cp_parser_initializer
        ../../gcc-source-trunk/gcc/cp/parser.c:21918
0x8268a6 cp_parser_init_declarator
        ../../gcc-source-trunk/gcc/cp/parser.c:19716
0x82949f cp_parser_simple_declaration
        ../../gcc-source-trunk/gcc/cp/parser.c:13125
0x82a338 cp_parser_block_declaration
        ../../gcc-source-trunk/gcc/cp/parser.c:12943
0x832674 cp_parser_declaration
        ../../gcc-source-trunk/gcc/cp/parser.c:12840
0x831016 cp_parser_declaration_seq_opt
        ../../gcc-source-trunk/gcc/cp/parser.c:12716
0x83133e cp_parser_translation_unit
        ../../gcc-source-trunk/gcc/cp/parser.c:4502
0x83133e c_parse_file()
        ../../gcc-source-trunk/gcc/cp/parser.c:39022
0x977ee5 c_common_parse_file()
        ../../gcc-source-trunk/gcc/c-family/c-opts.c:1127
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.
$

----------------------------------

struct A
{ 
  int i;
  int s[8];
};

int b = __builtin_offsetof (A, s[-1]);