Oh, and as I continue to grep, I found this in dependencies.c: dependencies = (MVDependencies *) repalloc(dependencies, offsetof(MVDependencies, deps) + dependencies->ndeps * sizeof(MVDependency));
I'm pretty sure this is an actual bug: the calculation should be offsetof(MVDependencies, deps) + dependencies->ndeps * sizeof(MVDependency *)); because deps is an array of MVDependency* not MVDependency. This would lead to an overallocation not underallocation, and it's probably pretty harmless because ndeps can't get too large (I hope; if it could, this would have O(N^2) performance problems). Still, you oughta fix it. (There's a similar calculation later in the file that gets it right.) regards, tom lane