Debian bug #369706 seems to be suggesting the issue was caused by libgc1c2 version 1:6.7-1 and that by downgrading to 6.6-2 the issue should be resolved. That bug has a bunch of additional analysis that would be worth reviewing.
Debian bug #369706 seems to be suggesting the issue was caused by libgc1c2 version 1:6.7-1 and that by downgrading to 6.6-2 the issue should be resolved. That bug has a bunch of additional analysis that would be worth reviewing.