[erlang-bugs] common_test + test_server_io errors

Tim Watson <>
Wed Jun 26 18:01:22 CEST 2013

I'm seeing some weird errors in my common_test suites since upgrading to R16B01 - I'd like to know if this is a bug or if my code is doing something wrong...

ct_util_server got EXIT from <0.227.0>: {noproc,
                                           [[[["<div class=\"default\"><b>*** User 2013-06-26 16:47:39.122 ***</b>"],

That message originated in these lines of code, running in a process started outside of common_test:

log(framework, "watchdog: no procs to kill~n", []);

which calls another module:

log(Scope, Fmt, Args) ->
   gen_event:sync_notify(systest_event_log, {Scope, Fmt, Args}).

which ends up in the following handler (amongst other places):

write_log(EvId, _Fd, What, Args) ->
   ct:log("[" ++ as_string(EvId) ++ "] " ++ as_string(What), Args).

So what's up with the "unexpected_io" error here, and *why* has this brought the whole common_test run down?



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