[Bug c/68473] [6 Regression] ICE: in contains_point, at diagnostic-show-locus.c:340 after error

["jay.foad at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68473

Jay Foad <jay.foad at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |jay.foad at gmail dot com

--- Comment #6 from Jay Foad <jay.foad at gmail dot com> ---
FYI here's another test case that seems to trigger the same bug. Your candidate
patch fixes it.

$ cat x.c
#define P(b) b&&4
int a[]=0;
int f() { X||P(d); }
$ ~/gcc/build/gcc/cc1 -quiet -Wall x.c
[...]
x.c:3:1: internal compiler error: in contains_point, at
diagnostic-show-locus.c:335
 int f() { X||P(d); }
 ^~~

0x1268fc9 contains_point
        /home/jay/svn/gcc/trunk/gcc/diagnostic-show-locus.c:335
0x1268fc9 get_state_at_point
        /home/jay/svn/gcc/trunk/gcc/diagnostic-show-locus.c:612
0x12696e2 print_source_line
        /home/jay/svn/gcc/trunk/gcc/diagnostic-show-locus.c:533
0x12696e2 diagnostic_show_locus(diagnostic_context*, diagnostic_info const*)
        /home/jay/svn/gcc/trunk/gcc/diagnostic-show-locus.c:710
0x69b210 c_diagnostic_finalizer
        /home/jay/svn/gcc/trunk/gcc/c-family/c-opts.c:167
0x1267220 diagnostic_report_diagnostic(diagnostic_context*, diagnostic_info*)
        /home/jay/svn/gcc/trunk/gcc/diagnostic.c:800
0x1267b07 warning_at(unsigned int, int, char const*, ...)
        /home/jay/svn/gcc/trunk/gcc/diagnostic.c:1029
0x607e58 parser_build_binary_op(unsigned int, tree_code, c_expr, c_expr)
        /home/jay/svn/gcc/trunk/gcc/c/c-typeck.c:3514
0x61855a c_parser_binary_expression
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:6539
0x618a18 c_parser_conditional_expression
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:6182
0x619100 c_parser_expr_no_commas
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:6099
0x6198d2 c_parser_expression
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:8230
0x61a3a9 c_parser_expression_conv
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:8263
0x633431 c_parser_statement_after_labels
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:5172
0x635065 c_parser_compound_statement_nostart
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:4757
0x6358ae c_parser_compound_statement
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:4594
0x6314e3 c_parser_declaration_or_fndef
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:2015
0x63d31d c_parser_external_declaration
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:1459
0x63dbe9 c_parser_translation_unit
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:1346
0x63dbe9 c_parse_file()
        /home/jay/svn/gcc/trunk/gcc/c/c-parser.c:17622
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