[Bug c++/80091] gcc from gcc-6 branch segfaults while compiling firefox

["trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80091

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1
             Status|WAITING                     |NEW
      Known to work|                            |6.3.0
   Target Milestone|---                         |6.3
      Known to fail|                            |6.3.1

--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Never mind, I have reproduced it locally:

/home/markus/tmp/moz-build-dir/dist/include/nsTObserverArray.h:260:30: internal
compiler error: Segmentation fault
         AdjustIterators(i, -1);
                              ^
0xa8a3df crash_signal
        /home/markus/gcc/gcc/toplev.c:333
0x7f2966dfb36f ???
       
/home/markus/glibc/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x6ad664 maybe_generic_this_capture(tree_node*, tree_node*)
        /home/markus/gcc/gcc/cp/lambda.c:813
0x61e1df cp_parser_postfix_expression
        /home/markus/gcc/gcc/cp/parser.c:6870
0x61e6bd cp_parser_unary_expression
        /home/markus/gcc/gcc/cp/parser.c:7999
0x61f423 cp_parser_cast_expression
        /home/markus/gcc/gcc/cp/parser.c:8676
0x61fb97 cp_parser_binary_expression
        /home/markus/gcc/gcc/cp/parser.c:8777
0x620244 cp_parser_assignment_expression
        /home/markus/gcc/gcc/cp/parser.c:9064
0x62245a cp_parser_expression
        /home/markus/gcc/gcc/cp/parser.c:9233
0x622b11 cp_parser_expression_statement
        /home/markus/gcc/gcc/cp/parser.c:10696
0x614622 cp_parser_statement
        /home/markus/gcc/gcc/cp/parser.c:10547
0x6150ad cp_parser_statement_seq_opt
        /home/markus/gcc/gcc/cp/parser.c:10819
0x615157 cp_parser_compound_statement
        /home/markus/gcc/gcc/cp/parser.c:10773
0x632645 cp_parser_implicitly_scoped_statement
        /home/markus/gcc/gcc/cp/parser.c:11936
0x614c1c cp_parser_selection_statement
        /home/markus/gcc/gcc/cp/parser.c:10900
0x614c1c cp_parser_statement
        /home/markus/gcc/gcc/cp/parser.c:10402
0x6150ad cp_parser_statement_seq_opt
        /home/markus/gcc/gcc/cp/parser.c:10819
0x60e0a6 cp_parser_lambda_body
        /home/markus/gcc/gcc/cp/parser.c:10285
0x60e0a6 cp_parser_lambda_expression
        /home/markus/gcc/gcc/cp/parser.c:9769
0x60e0a6 cp_parser_primary_expression
        /home/markus/gcc/gcc/cp/parser.c:4935
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.

This is a gcc-6 branch regression.
Reducing...