MSVC link errors are not properly captured

[FiniteReality]

Test case:

     3>console.obj : error LNK2019: unresolved external symbol "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl cli::detail::usage(class std::basic_ostream<char,struct std::char_traits<char> > &,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >)" (?usage@detail@cli@@YAAEAV?$basic_ostream@DU?$char_traits@D@std@@@std@@AEAV34@V?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@4@@Z) referenced in function "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl cli::usage(class std::basic_ostream<char,struct std::char_traits<char> > &)" (?usage@cli@@YAAEAV?$basic_ostream@DU?$char_traits@D@std@@@std@@AEAV23@@Z) [D:\a\Fabulist\Fabulist\build\samples\cli\cli.vcxproj]
     3>main.obj : error LNK2019: unresolved external symbol "class std::optional<struct cli::parsed_arguments> __cdecl cli::parse_arguments(int,char const * *)" (?parse_arguments@cli@@YA?AV?$optional@Uparsed_arguments@cli@@@std@@HPEAPEBD@Z) referenced in function main [D:\a\Fabulist\Fabulist\build\samples\cli\cli.vcxproj]

Expected:

• LNK2019 error is captured

Actual:

• LNK2019 error is skipped

Looks like the fix is to make the line info capture optional.

[FiniteReality]

Just noting this down for later:
^(?:\s+\d+\>)?([^\s].*?)(?:\((?:(\d+)(?:,(\d+)(?:,\d+,\d+)?)?)\))?\s*:\s+(?:fatal\s+)?(error|warning|info)\s+(\w+\d+)\s*:\s*(.*)$