Vadim Alekseev 8d1b88f985 lib/regexutil: prevent panic error parsing regexp: expression nests too deeply ...

Previously regex simplify function made an attempt to parse string representation of simplified regex.
And it could produce runtime panic due to std lib specification:

```
// Simplify returns a regexp equivalent to re but without counted repetitions
// and with various other simplifications, such as rewriting /(?:a+)+/ to /a+/.
// The resulting regexp will execute correctly but its string representation
// will not produce the same parse tree, because capturing parentheses
// may have been duplicated or removed.
```
 
 This commit ignores simplified regex parsing error and returns back original regex. 
It results into possible missing simplification of some niche regex patterns. 
But it's extremely rare cases rarely seen in production. So the tradeoff is acceptable. 

Fixes victoriaMetrics/victoriaLogs/issues/1112

2026-02-20 11:51:42 +01:00

..

promregex_test.go

lib/logstorage: work-in-progress

2024-05-24 03:06:55 +02:00

promregex_timing_test.go

all: consistently use %w instead of %s in when error is passed to fmt.Errorf()

2023-10-25 21:24:03 +02:00

promregex.go

all: run go fix -slicescontains

2026-02-18 18:17:20 +01:00

regex_test.go

lib/regexutil: prevent panic error parsing regexp: expression nests too deeply

2026-02-20 11:51:42 +01:00

regex_timing_test.go

lib/logstorage: work-in-progress

2024-05-24 03:06:55 +02:00

regex.go

Spelling and Markdown Standards

2025-08-18 22:46:34 +02:00

regexutil_test.go

lib/logstorage: work-in-progress

2024-05-24 03:06:55 +02:00

regexutil.go

lib/regexutil: prevent panic error parsing regexp: expression nests too deeply

2026-02-20 11:51:42 +01:00