[Bug target/94087] std::random_device often fails when used from multiple threads

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94087

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Sorry, I read "Creating and using **a** `std::random_device` object fails when
used from multiple threads" to mean creating one object, and then apparently
didn't read the code properly to dispel my misunderstanding.