Opened 5 years ago

Closed 3 years ago

#7189 closed bug (duplicate)

RTS Assertion Crash

Reported by: sseverance Owned by: simonmar
Priority: normal Milestone: 7.10.1
Component: Runtime System Version: 7.4.2
Keywords: Cc: nathanhowell@…, simonmar
Operating System: Linux Architecture: x86_64 (amd64)
Type of failure: Runtime crash Test Case:
Blocked By: Blocking:
Related Tickets: #8014 Differential Rev(s):
Wiki Page:

Description (last modified by igloo)

I occasionally get the following crash when I compile with -debug:

internal error: ASSERTION FAILED: file rts/Schedule.c, line 1268

    (GHC version 7.4.2 for x86_64_unknown_linux)
    Please report this as a GHC bug:

If the application is not compiled with -debug this does not seem to happen. Usually I just don't link in the debug runtime however I have been trying to rundown an IO that never completes. I can't post the app but I am happy to collect information to attach to this ticket.

Change History (14)

comment:1 Changed 5 years ago by sseverance

Component: CompilerRuntime System
Operating System: Unknown/MultipleLinux
Type of failure: None/UnknownRuntime crash

comment:2 Changed 5 years ago by sseverance

Architecture: Unknown/Multiplex86_64 (amd64)

comment:3 Changed 5 years ago by igloo

Description: modified (diff)
difficulty: Unknown

comment:4 Changed 5 years ago by igloo

Milestone: 7.8.1
Owner: set to simonmar

This is

ASSERT(task->incall->tso == t);

in scheduleHandleThreadFinished. It looks unchanged in HEAD.

Simon, perhaps you could take a look please?

comment:5 Changed 5 years ago by simonmar

Please could you run with +RTS -Ds and post the resulting log. Thanks.

comment:6 Changed 5 years ago by nathanhowell

Cc: nathanhowell@… added

I have debugged this a little bit... from my recollection, the two TSOs were identical but were located at different addresses (hence the assert). It seemed like the GC had copied it but failed to update the task->incall pointer.

comment:7 Changed 5 years ago by sseverance

The log file is 34MB. Do you want me to upload it somewhere where it can be downloaded for would the last 256K be fine?

comment:8 Changed 5 years ago by simonmar

Please upload it somewhere (is that 34MB compressed?). e.g. Dropbox is fine.

comment:9 Changed 5 years ago by sseverance

1.5 MB Gzipped. Here is the link:

comment:10 Changed 4 years ago by simonmar

Status: newinfoneeded

I can't see anything obvious from the log or by looking for bugs in the code, and I tried in vain to reproduce it. What RTS options are you using?

comment:11 Changed 4 years ago by monoidal

This might be related to #8014, which also occurs in -debug mode.

comment:12 Changed 3 years ago by thoughtpolice

Cc: simonmar added
Milestone: 7.8.3

comment:13 Changed 3 years ago by thoughtpolice

Milestone: 7.10.1

comment:14 Changed 3 years ago by thomie

Resolution: duplicate
Status: infoneededclosed

Closing as a duplicate of #8014. Alas, we still don't have any way to reproduce this.

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