Color support detection emits a following warning when an unexpected type of stream (like php://memory) is passed to the method.

E_WARNING: sapi_windows_vt100_support() was not able to analyze the specified stream

I think that we can simply use a stfu operator for that case, since the native function returns false when this warning gets emitted, so the detection simply falls back to former behavior.

Also note, that polyfill for PHP < 7.2 does not reproduce this behavior.