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ippStsRegExpGroupingErr
This status is about pattern structure. IPP rejected the way groups are opened, closed, nested, or combined with group-specific syntax.
Start with the post-escaped pattern that actually reaches IPP. A pattern that looks balanced in source code can become unbalanced after string-literal processing, template expansion, or user-supplied fragments are concatenated.
What to compare
- Raw configuration text versus the final runtime pattern.
- Opening and closing parentheses after escaping is applied.
- Lookaround, noncapturing, or option-group syntax that may not be supported by the IPP parser.
Intel IPP RegExp functions · Perl regular expression reference
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