https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85110
Bug ID: 85110 Summary: Missing underlines for some bad arguments Product: gcc Version: 8.0 Status: UNCONFIRMED Keywords: diagnostic Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: dmalcolm at gcc dot gnu.org Target Milestone: --- In gcc 8, the C++ FE underlines some bogus arguments to function calls, as of r256448. However we're missing some. Given: void callee (int one, const char **two, int three); void caller (const char *fmt) { callee (1, fmt, 3); } We emit: $ g++ test.cc test.cc: In function ‘void caller(const char*)’: test.cc:6:20: error: cannot convert ‘const char*’ to ‘const char**’ for argument ‘2’ to ‘void callee(int, const char**, int)’ callee (1, fmt, 3); ^ We ought to underline the problematic argument, and, ideally the decl. I have a patch for this.