files in <b>pcretest</b> is intended for testing
and experimentation. It is not intended for production use because only a
single pattern can be written to a file. Furthermore, there is no facility for
supplying custom character tables for use with a reloaded pattern. If the
original pattern was compiled with custom tables, an attempt to match a subject
string using a reloaded pattern is likely to cause <b>pcretest</b> to crash.
Finally, if you attempt to load a file that is not in the correct format, the
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