"README.md" did not exist on "6b4a914e9af95bb65d2ad5f7f13a72803eb6befc"
and to check this flag before it selects. This way, if we recursively enter the handler (due to write-string calling something that calls serve-event), then we won't blow out when we unwind.
/bin/sh if the original exec didn't work because of a bad magic number.