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    Bug 
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    Resolution: Done
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    P1: Critical 
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    5.9.0 Beta 3
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        9406bef6b33b1b9c2d8bb64200266a8449eced4a
[REG 5.9.0b2->5.9.0b3][macOS]: When creating QSharedMemory in one version and then attaching to it from another version, it will fail. If they are both created with the same version then it works fine.