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ippStsRegExpQuantifierErr
This is a compile-time pattern error. It usually means the repetition syntax is invalid for the IPP Perl-compatible RegExp parser: for example, a quantifier is missing its target atom or has an invalid range.
Check the exact pattern after application escaping, not only the human-written pattern. Many bugs are introduced when a configuration file, JSON string, or command-line layer consumes backslashes before IPP sees the pattern.
Examples of suspicious areas
- Empty or reversed brace ranges such as malformed
{m,n}constructs. - Repeated quantifiers applied to another quantifier.
- Escaping differences between application strings and regex syntax.
Intel IPP RegExp functions · Perl regular expression reference
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