I've discovered that several allocators in std.experimental.allocator call deallocateAll on their parent allocators during their destructors. This is not a problem unless the parent allocator happens to be GCAllocator and the original destructor call was caused by a GC collection. GC.free cannot be called while the GC is active. (The resulting InvalidMemoryOperationError is why DCD 0.7.0 final isn't out today) Any ideas how this problem should be solved?