SIGSEGV when it tries to wait for a futex

[techmetx11]

The code segfaults when it tries to wait for a futex (related to Tokio)
More info: iv-org/inv_sig_helper#12
A coredump of the crash and build is provided at iv-org/inv_sig_helper#12 (comment)
From the coredump, the program is shown crashing at these first few locations in the code:

1. unknown function (0x00007fc5ed1a3719)
2. https://github.com/Amanieu/parking_lot/blob/master/core/src/thread_parker/linux.rs#L112
3. https://github.com/Amanieu/parking_lot/blob/master/core/src/thread_parker/linux.rs#L66
4. https://github.com/Amanieu/parking_lot/blob/master/core/src/parking_lot.rs#L635
5. https://github.com/Amanieu/parking_lot/blob/master/core/src/parking_lot.rs#L600

[Amanieu]

Are you sure it's actually crashing in that thread? It seems like this is just the main thread which is blocked waiting on a lock while the crash is happening in another thread.

[techmetx11]

All the other threads are also blocked waiting for a lock (in the coredump)

[Amanieu]

All of the threads in that core dump are in system calls, which shouldn't be able to cause a SIGSEGV. It seems the core dump was not taken at the moment the crash happened.

[techmetx11]

All of the threads in that core dump are in system calls, which shouldn't be able to cause a SIGSEGV. It seems the core dump was not taken at the moment the crash happened.

That's weird, because the kernel makes a core dump after the program crashed (or at least, it should be)

Also, it seems like it crashes due to a malloc header corruption at times, as seen in the linked issue