https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65817

            Bug ID: 65817
           Summary: libcc1: ICE: SEGV: c_incomplete_type_error()
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: plugins
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jan.kratochvil at redhat dot com
                CC: pmuldoon at redhat dot com
              Host: x86_64-linux-gnu
            Target: x86_64-linux-gnu

r222230

Current libcc1 uses just: make_node (RECORD_TYPE)
which crashes on:
      if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
as TYPE_NAME (type) == NULL .

Actual:
*** WARNING *** there are active plugins, do not report this as a bug unless
you can reproduce it without enabling any plugins.
Event                            | Plugins
PLUGIN_PRE_GENERICIZE            | libcc1plugin
PLUGIN_GGC_MARKING               | libcc1plugin
PLUGIN_PRAGMAS                   | libcc1plugin
gdb command line:1:1: internal compiler error: Segmentation fault
0xb1c4af crash_signal
        ../../gccgitatsign/gcc/toplev.c:383
0x618794 c_incomplete_type_error(tree_node const*, tree_node const*)
        ../../gccgitatsign/gcc/c/c-typeck.c:282
0x623750 c_incomplete_type_error(tree_node const*, tree_node const*)
        ../../gccgitatsign/gcc/c/c-typeck.c:235
0x623750 build_component_ref(unsigned int, tree_node*, tree_node*)
        ../../gccgitatsign/gcc/c/c-typeck.c:2304
0x654fb3 c_parser_postfix_expression_after_primary
        ../../gccgitatsign/gcc/c/c-parser.c:7925
0x6478f6 c_parser_postfix_expression
        ../../gccgitatsign/gcc/c/c-parser.c:7715
0x649f5a c_parser_unary_expression
        ../../gccgitatsign/gcc/c/c-parser.c:6602
0x65122f c_parser_cast_expression
        ../../gccgitatsign/gcc/c/c-parser.c:6440
0x651412 c_parser_binary_expression
        ../../gccgitatsign/gcc/c/c-parser.c:6255
0x651f75 c_parser_conditional_expression
        ../../gccgitatsign/gcc/c/c-parser.c:6031
0x652560 c_parser_expr_no_commas
        ../../gccgitatsign/gcc/c/c-parser.c:5949

0x652c52 c_parser_expression
        ../../gccgitatsign/gcc/c/c-parser.c:8022
0x653689 c_parser_expression_conv
        ../../gccgitatsign/gcc/c/c-parser.c:8055
0x661978 c_parser_statement_after_labels
        ../../gccgitatsign/gcc/c/c-parser.c:5115
0x663173 c_parser_compound_statement_nostart
        ../../gccgitatsign/gcc/c/c-parser.c:4701
0x66399e c_parser_compound_statement
        ../../gccgitatsign/gcc/c/c-parser.c:4538
0x661a67 c_parser_statement_after_labels
        ../../gccgitatsign/gcc/c/c-parser.c:4964
0x663173 c_parser_compound_statement_nostart
        ../../gccgitatsign/gcc/c/c-parser.c:4701
0x66399e c_parser_compound_statement
        ../../gccgitatsign/gcc/c/c-parser.c:4538
0x65fc80 c_parser_declaration_or_fndef
        ../../gccgitatsign/gcc/c/c-parser.c:1982
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.
Compilation failed.

Expected:
gdb command line:1:1: error: invalid use of incomplete typedef ‘({anonymous})’

1586c8fbaf0116931ffacd1746a6540c81c2d438 GDB commit

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