[Bug sanitizer/100878] enabling UBSAN leads to false positive `'this' pointer is null` when casting lambda to function pointer

[ed at catmur dot uk via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100878

--- Comment #1 from Ed Catmur <ed at catmur dot uk> ---
Per godbolt, this appears to be fixed on trunk: https://godbolt.org/z/xxz8ecxzK

g++
(Compiler-Explorer-Build-gcc-48e8a7a677b8356df946cd12fbb215538828e747-binutils-2.36.1)
12.0.0 20210707 (experimental)