[erlang-questions] Segfault with Erlang R22

Bekes, Andras G Andras.Bekes@REDACTED
Fri Oct 18 16:33:40 CEST 2019

Hi All,

After upgrading to Erlang R22, my software crashes the Erlang VM with Segmentation fault.
It happens rarely, only after several days of test workload, so I can't really reproduce.

I made more than 10 core dumps so far, loaded them into gdb, and all of them died at these 2 crash points:

Program terminated with signal 11, Segmentation fault.
#0  process_main (x_reg_array=0x20002, f_reg_array=0x2ade29280590) at x86_64-unknown-linux-gnu/opt/smp/beam_hot.h:4064
4064      if (is_not_tuple(r(0))) {


#0  process_main (x_reg_array=0x20002, f_reg_array=0x2) at x86_64-unknown-linux-gnu/opt/smp/beam_hot.h:5252
5252          c_p->seq_trace_lastcnt = unsigned_val(SEQ_TRACE_TOKEN_SERIAL(c_p));

The software is not doing any tracing when the crash happens, nor does it have any NIFs.

What should be the next step of investigation?


Andras G. Bekes

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