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- MGPipeVerifyReadHook honours MOBILEGL_PIPE_VERIFY_CORRUPT: it perturbs the ORACLE after CopyField, and AGAIN after the ID-49 neutral-pack overwrite, because that overwrite replaces the pack half wholesale and CorruptStorage perturbs an array's element 0 - which is the pack half - until now the knob only ever reached EntryCompare, so every red it could produce was the client thread's where=entry and the hook that runs on the server's apply thread at every backend read had no falsifier at all - new entry per backend, DirectGLES/DirectVulkan.VerifySplitReadCorrupted., with CORRUPT=GetPixelStoreParameters and VERIFY_FATAL=0 - the field is in the kReadback fill mask, so the client entry compare would otherwise abort the process before the server reached the read - the case reads the SERVER role's half of its private log alone: with the knob armed a union search over both halves would be satisfied by the arm that is not under test - PipeStatsWindow.h gains ReadServerLogSince for that - test.yml grows the matching control step - run the two entries, then re-read both server halves from outside for the where=read report - measured: 2/2 green, server halves 3 and 2 lines, client halves 0 lines; revert-and-run with the two corruption blocks removed gives 2/2 red and both server halves 0 lines - the lane goes 1070 to 1072