[sgen] Fix a concurrent mark bug.
authorMark Probst <mark.probst@gmail.com>
Wed, 15 Apr 2015 22:55:42 +0000 (15:55 -0700)
committerMark Probst <mark.probst@gmail.com>
Wed, 15 Apr 2015 22:56:28 +0000 (15:56 -0700)
commitd55cfe091bdcab2d82bfd164605081a10dc75fd7
treee5f00f5aa369b438f4d90303b3b0e92dfe22a47a
parent9faaa724070a86c642a0c6a776aece0846c36248
[sgen] Fix a concurrent mark bug.

This made `sgen-descriptors.exe` crash with an assertion.
mono/metadata/sgen-workers.c