[DragonFlyBSD - Bug #2367] (Feedback) reproducible panic when sbcl drops into debugger

Markus Pfeiffer via Redmine bugtracker-admin at leaf.dragonflybsd.org
Wed Jun 20 15:11:04 PDT 2012

Issue #2367 has been updated by Markus Pfeiffer.

Status changed from New to Feedback

This should be fixed with commit 088621c17af05faef491565f0d1b276d7b2077d0. The panic was actually rooted in the polling framework not playing nicely with kqfilters on ttys. SBCL opens /dev/tty and uses it only in it's debugger which is why the problem only occurred after sbcl had dropped into the debugger.
Bug #2367: reproducible panic when sbcl drops into debugger

Author: Markus Pfeiffer
Status: Feedback
Priority: Normal
Target version: 

The kernel panics with 

panic: kqueue: checkloop failed i=0

on master when running sbcl and dropping into the debugger. Will upload SBCL package + core if necessary.

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