Corrupted Prefix Pattern

Application Verifier stop message

Heap violation detected. Corrupted prefix pattern at address <address>.

Probable cause

This error occurs when the prefix pattern is corrupted. This happens during buffer underruns.

Information displayed by Application Verifier in Tool Window

Heap Handle – Heap handle used in the call

Block address – Heap block involved in the operation

Size – Size of the heap block

Description - Corrupted prefix pattern at address <address>

Trace description – No stack frames for the current block

Additional information

Please read The Structure of a Page Heap Block for debugging tips.

Frequency of this error is low.

See Also

Concepts

Heap Verifier

The Structure of a Page Heap Block