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Application Verifier break message

Corrupted prefix pattern for heap block.

Probable cause

This happens for buffer underruns and when the prefix pattern is corrupted.

Information displayed by Application Verifier

Parameter1 - Heap handle used in the call

Parameter2 - Heap block involved in the operation

Parameter3 - Size of the heap block

Parameter4 - Not used

Description - Corrupted prefix pattern for heap block

Additional information

Verifier stop code 0012.

Frequency of this error is low.