Bug #8100
closedSegfault in trunk
Description
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Full backtrace (both VM, C and Ruby) is both attached and available at https://travis-ci.org/rtomayko/tilt/jobs/5479138
I haven't been able to reproduce it (and thus I can't create a reduced test case).
This is the test that fails: https://github.com/rtomayko/tilt/blob/581230cbb3b314e88cf5ec9167a24ebb8acc7a93/test/tilt_compilesite_test.rb#L31
The code in question will do these steps in several threads at the same time:
- https://github.com/rtomayko/tilt/blob/581230cbb3b314e88cf5ec9167a24ebb8acc7a93/lib/tilt/template.rb#L212
- Define a method called "tilt#{Thread.current.id.abs}" on Object
- Grab the UnboundMethod
- Undefine the method from Object
- https://github.com/rtomayko/tilt/blob/581230cbb3b314e88cf5ec9167a24ebb8acc7a93/lib/tilt/template.rb#L144
- Then it binds the UnboundMethod to an object and calls it
The method is doing some funky class << self
to ensure that it gets evaluated under a proper constant scope). It's also caching the methods, so it won't always define a new method, but might re-use another UnboundMethod from a previous compilation (that might have happened on a different thread).
I know it's not much to go after, but at least the backtrace seems to suggest that the error happend in rb_ary_fill in array.c.
I've also had another report of segfault in Tilt + Ruby 2.0.0, but I don't have the full backtrace yet: https://github.com/rtomayko/tilt/issues/179. Might this be related?
Let me know if you need more details.
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