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MDEV-12632: Source and destination overlap in memcpy, encryption.inno…
…db-discard-import-change fails in buildbot with valgrind Problem was that if tablespace was encrypted we try to copy also page 0 from read buffer to write buffer that are in that case the same memory area. fil_iterate When tablespace is encrypted or compressed its first page (i.e. page 0) is not encrypted or compressed and there is no need to copy buffer.
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Jan Lindström
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Apr 12, 2018
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