There appears to be a defect in XCode 10's dsymutil utility such that it can crash when generating debug info in multi-threaded mode (the default):
Adding -num-threads=1 works around this issue.
There appears to be a defect in XCode 10's dsymutil utility such that it can crash when generating debug info in multi-threaded mode (the default):
Adding -num-threads=1 works around this issue.