[Bug c++/108538] New: unexpected -Wnarrowing errors in -fpermissive mode

[stsp at users dot sourceforge.net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108538

            Bug ID: 108538
           Summary: unexpected -Wnarrowing errors in -fpermissive mode
           Product: gcc
           Version: 12.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: stsp at users dot sourceforge.net
  Target Milestone: ---

int main()
{
    unsigned char a[1] = { -1 };
    return a[0];
}

$ g++ -fpermissive nar.cpp 
nar.cpp: In function ‘int main()’:
nar.cpp:3:28: error: narrowing conversion of ‘-1’ from ‘int’ to ‘unsigned char’
[-Wnarrowing]
    3 |     unsigned char a[1] = { -1 };


While I know that some -Wnarrowing
warnings were promoted to an errors,
was it the right decision also in
-fpermissive mode, which accepts most
of the C code?