Deadlock when a corrupted file is given as input with multiple inputs

[glandium]

I haven't determined whether the file is actually corrupt yet, or if it just contains something that is unsupported, but when that happens, dump_syms deadlocks on receiver.recv() in consumer.

STR:

• Download and unpack https://drive.google.com/file/d/1OYhss3a0l0X8eMZk4s7nFK7oYvChYFV_/view?usp=sharing
• Run dump_syms -a x86_64 --inlines XUL.dSYM XUL