[Bug libstdc++/105730] [12/13 Regression] Issue with commit - Allow std::condition_variable waits to be cancelled

[glex.spb at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105730

--- Comment #7 from Gleb Mazovetskiy <glex.spb at gmail dot com> ---
$ output/gcw0/host/bin/mipsel-gcw0-linux-uclibc-gcc-nm -gD
output/gcw0/target/lib/libstdc++.so | grep condition_variable | grep wait
00084ecc T
_ZNSt18condition_variable4waitERSt11unique_lockISt5mutexE@GLIBCXX_3.4.11
000b2804 T
_ZNSt18condition_variable4waitERSt11unique_lockISt5mutexE@@GLIBCXX_3.4.30

Note that the 3.4.11 has a single @.
All the other symbols have @@.