https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67574
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The location was fixed in GCC 10+:
<source>:7:1: error: definition of explicitly-defaulted 'X::X()'
7 | X::X() = default;
| ^
<source>:6:1: note: 'X::X()' explicitly defaulted here
6 | X::X() = default;
| ^
Is that enough to fix this issue?
Note here is clang produces:
<source>:7:4: error: redefinition of 'X'
X::X() = default;
^
<source>:6:4: note: previous definition is here
X::X() = default;
^
