[Bug c++/72849] New: [7 Regression] r239267 causes Firefox build failure

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72849

            Bug ID: 72849
           Summary: [7 Regression] r239267 causes Firefox build failure
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org
  Target Milestone: ---

trippels@gcc2-power8 thebes % /home/trippels/gcc_test/usr/local/bin/c++ -w -c
Unified_cpp_gfx_thebes0.ii
In file included from
/home/trippels/gecko-dev/gfx/thebes/gfxBaseSharedMemorySurface.cpp:1:0,
                 from
/home/trippels/moz-build-dir/gfx/thebes/Unified_cpp_gfx_thebes0.cpp:29:
/home/trippels/gecko-dev/gfx/thebes/gfxBaseSharedMemorySurface.h: In static
member function ‘static bool gfxBaseSharedMemorySurface<Base,
Sub>::IsSharedImage(gfxASurface*)’:
/home/trippels/gecko-dev/gfx/thebes/gfxBaseSharedMemorySurface.h:96:39:
internal compiler error: Segmentation fault
                  const gfxIntSize& aSize,
                                       ^~~    
0x10b014d3 crash_signal
        ../../gcc/gcc/toplev.c:335
0x102a9114 tree_check
        ../../gcc/gcc/tree.h:3022
0x102a9114 is_really_empty_class(tree_node*)
        ../../gcc/gcc/cp/class.c:8426
0x1047aad3 cxx_eval_constant_expression
        ../../gcc/gcc/cp/constexpr.c:3702
0x1047331f cxx_eval_outermost_constant_expr
        ../../gcc/gcc/cp/constexpr.c:4383
0x10483a03 fold_non_dependent_expr(tree_node*)
        ../../gcc/gcc/cp/constexpr.c:4662
0x1020d997 build_non_dependent_expr(tree_node*)
        ../../gcc/gcc/cp/pt.c:23802
0x1035b9cb build_x_unary_op(unsigned int, tree_code, cp_expr, int)
        ../../gcc/gcc/cp/typeck.c:5353
0x1030b287 cp_parser_unary_expression
        ../../gcc/gcc/cp/parser.c:7966
0x10317bcf cp_parser_cast_expression
        ../../gcc/gcc/cp/parser.c:8693
0x10318357 cp_parser_binary_expression
        ../../gcc/gcc/cp/parser.c:8795
0x10318e93 cp_parser_assignment_expression
        ../../gcc/gcc/cp/parser.c:9083
0x1031b30f cp_parser_parenthesized_expression_list
        ../../gcc/gcc/cp/parser.c:7487
0x1030d7e3 cp_parser_postfix_expression
        ../../gcc/gcc/cp/parser.c:6795
0x1030b06f cp_parser_unary_expression
        ../../gcc/gcc/cp/parser.c:8016
0x10317bcf cp_parser_cast_expression
        ../../gcc/gcc/cp/parser.c:8693
0x1031872f cp_parser_simple_cast_expression
        ../../gcc/gcc/cp/parser.c:26014
0x1031872f cp_parser_binary_expression
        ../../gcc/gcc/cp/parser.c:8858
0x10318e93 cp_parser_assignment_expression
        ../../gcc/gcc/cp/parser.c:9083
0x1031c667 cp_parser_expression
        ../../gcc/gcc/cp/parser.c:9250
Please submit a full bug report,

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