The job was canceled because "ubuntu-latest_stable_--re" failed.

failed to run custom build command for `testcrate v0.1.0 (/home/runner/work/zeromq-src-rs/zeromq-src-rs/testcrate)`

The process '/home/runner/.cargo/bin/cargo' failed with exit code 101

testcrate@0.1.0: In file included from /usr/include/c++/11/condition_variable:35,

testcrate@0.1.0: from /home/runner/work/zeromq-src-rs/zeromq-src-rs/vendor/src/mailbox_safe.hpp:16,

testcrate@0.1.0: /usr/include/c++/11/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.

testcrate@0.1.0: | ^~~~~

testcrate@0.1.0: from /home/runner/work/zeromq-src-rs/zeromq-src-rs/vendor/src/mailbox_safe.cpp:4:

testcrate@0.1.0: 102 | std::condition_variable_any _cv;

testcrate@0.1.0: /home/runner/work/zeromq-src-rs/zeromq-src-rs/vendor/src/condition_variable.hpp:102:5: note: ‘std::condition_variable_any’ is only available from C++11 onwards

testcrate@0.1.0: | ^~~

testcrate@0.1.0: /home/runner/work/zeromq-src-rs/zeromq-src-rs/vendor/src/condition_variable.hpp:84:13: error: ‘_cv’ was not declared in this scope