[Bug c++/107138] [12 regression] std::variant triggers false-positive 'may be used uninitialized' warning

[gcc at cohi dot at via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107138

--- Comment #19 from Colin Hirsch <gcc at cohi dot at> ---
Created attachment 65090
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65090&action=edit
The error when compiling the PEGTL with GCC 16.1.0 and -O3 without
-fsanitize=undefined

Includes the compiler version, command line, error, and full preprocessed
source.