Macruby "incorrect checksum for freed object" (w/simple test case)

[andre]

Nokogiri on Macruby (0.8) is sporadically crashing with "incorrect checksum for freed object - object was probably modified after being freed."

It doesn't crash every time I run the test, but if I run it 10 times, I get one or more failures.

Self-contained script to reproduce: https://gist.github.com/797346.

Example crash output:

$ macruby nokogiri_test.rb 
starting
Nokogiri parsed the html
Run # 0: OK
Run # 1: OKmacruby(59860,0x100f81000) malloc: *** error for object 0x10944ce38: incorrect checksum for freed object - object was probably modified after being freed.
*** set a breakpoint in malloc_error_break to debug
Abort trap

My Nokogiri info:

$ nokogiri -v
--- 
warnings: []
nokogiri: 1.4.4
ruby:
  version: 1.9.2
  platform: universal-darwin10.0
  engine: macruby
libxml:
  binding: extension
  compiled: 2.7.3
  loaded: 2.7.3

I posted this issue to the Nokogiri mailing list here.

[flavorjones]

Howdy!

This code appears to run fine under MRI (1.8, 1.9) and JRuby (1.5, 1.6). This leads me to think it may be a macruby bug. Can you try reporting it to the macruby team?

[andre]

Will do. Cheers,

Andre

[andre]

I reported to the MacRuby team, and we can't reproduce it in the nightly build -- what will become 0.9.

So it's definitely a MacRuby issue, not a Nokogiri one.

[flavorjones]

Awesome, thanks so much for following up and letting us know the outcome!

And thanks for using Nokogiri!