A recent Jetpack test run <https://tbpl.mozilla.org/?tree=Jetpack&usetinderbox=1&rev=b748278f0486> caused a Linux 64 debug build to fail with the assertion "###!!! ASSERTION: You can't dereference a NULL nsCOMPtr with operator->().: 'mRawPtr != 0', file ../../dist/include/nsCOMPtr.h, line 849". http://tinderbox.mozilla.org/showlog.cgi?tree=Jetpack&errorparser=unix&logfile=1320095820.1320096138.28401.gz&buildtime=1320095820&buildname=jetpack-mozilla-central-fedora64-debug&fulltext=1

I've set up a 64-bit Linux environment, but being unfamiliar with tinderbox output, I have no idea which test in which package is causing this bug. I need an exact sequence of steps to reproduce this bug locally.

The short version is: git clone git://github.com/mozilla/addon-sdk.git cd addon-sdk source bin/activate cfx testall --binary /path/to/debug/build/dist/bin/firefox Detailed instructions (including how to attach a debugger) are available on <https://wiki.mozilla.org/Jetpack/Testing>.