[Bug lto/88147] New: [9 Regression] ICE in linemap_line_start, at libcpp/line-map.c:781 starting from r265875

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88147

            Bug ID: 88147
           Summary: [9 Regression] ICE in linemap_line_start, at
                    libcpp/line-map.c:781 starting from r265875
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

Created attachment 45064
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45064&action=edit
test-case

Following is causing ICE:

$ g++ -pthread -shared -flto -o coin.so -O2 coin.ii
...
lto1: internal compiler error: in linemap_line_start, at libcpp/line-map.c:781
0x1559c2b linemap_line_start(line_maps*, unsigned int, unsigned int)
        /home/marxin/Programming/gcc/libcpp/line-map.c:781
0xabe713 lto_location_cache::apply_location_cache()
        /home/marxin/Programming/gcc/gcc/lto-streamer-in.c:194
0xabe801 stream_input_location_now(bitpack_d*, data_in*)
        /home/marxin/Programming/gcc/gcc/lto-streamer-in.c:304
0x140e0bb input_gimple_stmt
        /home/marxin/Programming/gcc/gcc/gimple-streamer-in.c:111
0x140e0bb input_bb(lto_input_block*, LTO_tags, data_in*, function*, int)
        /home/marxin/Programming/gcc/gcc/gimple-streamer-in.c:283
0xac179e input_function
        /home/marxin/Programming/gcc/gcc/lto-streamer-in.c:1092
0xac179e lto_read_body_or_constructor
        /home/marxin/Programming/gcc/gcc/lto-streamer-in.c:1295
0x819ac4 cgraph_node::get_untransformed_body()
        /home/marxin/Programming/gcc/gcc/cgraph.c:3545
0x825ba9 cgraph_node::expand()
        /home/marxin/Programming/gcc/gcc/cgraphunit.c:2166
0x826c43 expand_all_functions
        /home/marxin/Programming/gcc/gcc/cgraphunit.c:2334
0x826c43 symbol_table::compile()
        /home/marxin/Programming/gcc/gcc/cgraphunit.c:2685
0x78e4e9 lto_main()
        /home/marxin/Programming/gcc/gcc/lto/lto.c:3429

Note that the test case is ~15MB big, reduction is very problematic.