[Bug tree-optimization/122380] [15/16 regression] std::variant with std::vectors of differing types may lead to double frees since r15-5595

[eigengrau at vm86 dot se]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122380

--- Comment #18 from Henrik Lehtonen <eigengrau at vm86 dot se> ---
(In reply to Richard Biener from comment #17)
> Was the original testcase reduced from a real-world program or was it
> created artificially?

I ran into this issue as part of a real-world program (where we had to work
around it when upgrading to GCC 15).  The attached testcase was manually
reduced from there.