Thread Safety - Incorrect result from GetDataFormatString()

dotnetcore / NPOI

A .NET library for reading and writing Microsoft Office binary and OOXML file formats.

Apache License 2.0

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Thread Safety - Incorrect result from GetDataFormatString() #154

Open tbuchan opened 4 years ago

tbuchan commented 4 years ago

Caching implemented for the result of HSSFCellStyle.GetDataFormatString() uses unguarded statics and is not thread safe. In a multi-threaded environment you may receive the format string for a different cell.