[erlang-bugs] R12B3 tracing crashes emulator

Björn-Egil Dahlberg <>
Sun Oct 11 18:45:00 CEST 2009

Hi Simon,

These issues are fixed in R12B-4 and later. This section of code was 
completely revised in R12B-4, ticket OTP-7481.

Are you seeing this on later releases as well?


Simon Cornish wrote:
> Tracing on [all], or specifically [running, scheduler_id] trashes the
> stack leading to some sort of SEGV or BUS fault. Seen on Solaris
> i386/64-bit and OS/X i386/32-bit.
> This doesn't seem to be related to the other thing reported/fixed
> recently in R13.
> Patch attached.
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