% foo=$'\xa0' firefox  # in bash
ExceptionHandler::GenerateDump attempting to generate:/tmp//440cb935-2942-e0f6-3de7-13071c88007a.dmp
ExceptionHandler::GenerateDump cloned child 88822
ExceptionHandler::SendContinueSignalToChild sent continue signal to child
ExceptionHandler::WaitForContinueSignal waiting for continue signal...
ExceptionHandler::GenerateDump minidump generation succeeded
Segmentation fault

I know that one should almost always use UTF-8 these days, that's
not the point. Yet, crashing is inacceptable, since by definition,
environment variables are the environment, so many of them are not
meant for any particular program, and one should simply ignore those
one don't need.