ChakraCore Failed with fatal error

[zhangjiahui-buaa]

Hi, during fuzzing ChakraCore, following error poped up:

[REPRL] Script execution failed: Did not receive HELO message from child: Bad file descriptor. Retrying in 1 second...
[REPRL] Script execution failed again: Did not receive HELO message from child: Bad file descriptor. Giving up
[Fuzzer] Cannot execute programs (exit code must be zero when no exception was thrown). Are the command line flags valid?
[Fuzzer] Shutting down due to fatal error

Any idea why this happens?