[Bug tree-optimization/114592] [12/13/14/15 regression] Bogus `maybe-uninitialized` on std::variant with std::string with -O3

[mskybert+gccbugs at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114592

Magne Oestlyngen <mskybert+gccbugs at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |mskybert+gccbugs at gmail dot 
com

--- Comment #1 from Magne Oestlyngen <mskybert+gccbugs at gmail dot com> ---
Smaller minimal example:

#include <string>
#include <variant>
#include <vector>

void fails(std::vector<std::variant<int, std::string>>& vec)
{
    vec.push_back(1);
}

If vector is local to the function instead of input-param, there is no warning.