[Bug preprocessor/87630] New: [9 Regression] ICE in linemap_position_for_line_and_column, at libcpp/line-map.c:842

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87630

            Bug ID: 87630
           Summary: [9 Regression] ICE in
                    linemap_position_for_line_and_column, at
                    libcpp/line-map.c:842
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: preprocessor
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

Created attachment 44844
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44844&action=edit
unreduced testcase

Recently 502.gcc started to fail with

> gcc -std=gnu99 -m64 -c -o dbxout.o -DSPEC -DNDEBUG -I. -I./include -I./spec_qsort -DSPEC_502 -DSPEC_AUTO_SUPPRESS_OPENMP -DIN_GCC -DHAVE_CONFIG_H  -Ofast -g -march=native -mtune=native -mprefer-vector-width=128            -fgnu89-inline   -DSPEC_LP64  dbxout.c
during GIMPLE pass: printf-return-value
dbxout.c: In function ‘dbxout_stab_value_internal_label’:
dbxout.c:508:1: internal compiler error: in
linemap_position_for_line_and_column, at libcpp/line-map.c:842
  508 | dbxout_stab_value_internal_label (const char *stem, int *counterp)
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0x15d3cdb linemap_position_for_line_and_column(line_maps*, line_map_ordinary
const*, unsigned int, unsigned int)
        ../../trunk/libcpp/line-map.c:842
0x15d3cdb linemap_position_for_line_and_column(line_maps*, line_map_ordinary
const*, unsigned int, unsigned int)
        ../../trunk/libcpp/line-map.c:837
0x15b6eaa get_substring_ranges_for_loc
        ../../trunk/gcc/input.c:1464
0x15b7684 get_source_location_for_substring(cpp_reader*, string_concat_db*,
unsigned int, cpp_ttype, int, int, int, unsigned int*)
        ../../trunk/gcc/input.c:1517
0x80c22f c_get_substring_location(substring_loc const&, unsigned int*)
        ../../trunk/gcc/c-family/c-common.c:861
0xccc7a4 substring_loc::get_location(unsigned int*) const
        ../../trunk/gcc/substring-locations.c:284
0xccc7a4 format_string_diagnostic_t::emit_warning_n_va(int, unsigned long, char
const*, char const*, __va_list_tag (*) [1]) const
        ../../trunk/gcc/substring-locations.c:156
0x14966f8 fmtwarn
        ../../trunk/gcc/gimple-ssa-sprintf.c:472
0x1497b5e maybe_warn
        ../../trunk/gcc/gimple-ssa-sprintf.c:2706
0x1497b5e format_directive
        ../../trunk/gcc/gimple-ssa-sprintf.c:2822
0x149b89c compute_format_length
        ../../trunk/gcc/gimple-ssa-sprintf.c:3502
0x149b89c handle_gimple_call
        ../../trunk/gcc/gimple-ssa-sprintf.c:3988
0x149cd5d before_dom_children
        ../../trunk/gcc/gimple-ssa-sprintf.c:4027
0x145a4c2 dom_walker::walk(basic_block_def*)
        ../../trunk/gcc/domwalk.c:353
0x14963cb execute
        ../../trunk/gcc/gimple-ssa-sprintf.c:4053
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