[Bug libstdc++/95209] std::filesystem::path::lexically_normal mangles "//foo"

[terra at gnome dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95209

--- Comment #4 from M Welinder <terra at gnome dot org> ---
Sorry about the missing "-v".  It is indeed a x86_64-suse-linux system.  (It's
not internet facing or I'd go get the full output.)

"Implementation defined", yes, but the implementation is the os, not the
compiler/library.  The OS gets to choose and, possibly, change its mind
long after the compiler has written its output.

> What meaning does //foo have on linux?

Today, nothing separate, tomorrow who knows?  The OS is at perfect liberty to
assign a different meaning on Fridays if it so pleases.  Run the linux binary
on windows today and I suspect, but haven't verified, that it matters right
now.

Note that "cd //tmp" in bash shows that bash takes care not to mangle it.