Kyle Huey comments

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                                            Kyle Huey

Assertion `false' failed to hold. Replaying 'SIGNAL: SIGCHLD(async)': expecting tracee signal or trap, but instead at 'futex'

Actually linking me to the exact binaries you were using might be a better idea than me building from source.

Assertion 'stopped_or_unexpected_exit()' failed to hold.

I can reproduce that, thanks. rr stack ``` (gdb) bt #0 0x000073389bf2745f in accept () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00005e0141f2c9bb in rr::GdbServerConnection::await_debugger (this=0x5e0143cd0fe0, listen_fd=...) at /home/khuey/dev/rr/src/GdbServerConnection.cc:120 #2 0x00005e0141f2c91e in rr::GdbServerConnection::await_connection (t=0x5e0143caf720,...

Assertion 'stopped_or_unexpected_exit()' failed to hold.

The rough sequence of events here is 1. Task tid is ptraced. 2. Task tid's process takes a group stop SIGSTOP which sets emulated_stop_pending 3. Task tid is waited upon...

Assertion 'stopped_or_unexpected_exit()' failed to hold.

I tried writing a test case for this but I actually triggered a different rr bug :/