* commit 'fe79d62db3f5de7671763b4bbafc83feb1c7694c': Adding additional null checks to prevent crash after task stack view callback is reset. (Bug 18376798)
* commit 'fe79d62db3f5de7671763b4bbafc83feb1c7694c': Adding additional null checks to prevent crash after task stack view callback is reset. (Bug 18376798)