I should probably try to be less clever and use memory area's lower bounds as the key, and do the extra work required to get that working. [SVN r42587]
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-Subproject commit 86e01c9c4cc5babbfa08668c2a265c96b3d93e91
+Subproject commit 7d128006e11f582e9b344400c849785e4d2a9e4f