[Bug libstdc++/79114] [6 Regression] std::throw_with_nested("string literal") is rejected

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79114

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
FTR this was found by https://github.com/antlr/antlr4/issues/1608