[Bug c++/127697] New: [modules] ICE on incomplete import

[luigighiron at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127697

            Bug ID: 127697
           Summary: [modules] ICE on incomplete import
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: luigighiron at gmail dot com
  Target Milestone: ---

The following program causes an internal compiler error on GCC 17 with
-fmodules:

import<

Error message (tested on godbolt):

> <source>:1:8: internal compiler error: unspellable token PRAGMA_EOL
>     1 | import<
>       |        ^
> 0xf36d25 c_cpp_diagnostic(cpp_reader*, cpp_diagnostic_level, 
> cpp_warning_reason, rich_location*, char const*, __va_list_tag (*) [1])
>       ???:0
> 0x2d3b22a cpp_error(cpp_reader*, cpp_diagnostic_level, char const*, ...)
>       ???:0
> 0x2d48c03 cpp_spell_token(cpp_reader*, cpp_token const*, unsigned char*, bool)
>       ???:0
> 0xf58cfa c_lex_with_flags(tree_node**, unsigned long*, unsigned char*, int)
>       ???:0
> 0xddab8a c_parse_file()
>       ???:0
> 0xf6ea39 c_common_parse_file()
>       ???:0