David Ellsworth

PCRE2 can use fixed-length backreferences inside lookbehinds, but regex101 doesn't allow it

3

## Bug Description PCRE2 supports using backreferences inside lookbehinds as long as it can detect that they are fixed-length. For example, `(.)(?

Python flavor doesn't reject nested backreferences, which Python itself does

2

## Bug Description Python doesn't support nested backreferences. For example, `/^(^x|\1xx)*$/` cannot be used to match strings of `x` with the length of a perfect square, because it references `\1`...

I'd really like to switch from NTFS to btrfs while still continuing to use Windows as my primary OS for a while longer, but there is one main problem standing...

PowerShell is broken

1

Any attempt to run a PowerShell program (even an empty one) results in this error: ``` /ATO/runner: line 4: 2 File size limit exceeded(core dumped) /ATO/yargs %1 /ATO/options /ATO/yargs %2...

## Feature Ideally all [.NET regex flags](https://learn.microsoft.com/en-us/dotnet/api/system.text.regularexpressions.regexoptions) should be accessible. The ones that currently aren't are `Compiled`, `RightToLeft`, `ECMAScript`, and `CultureInvariant`. But `RegexOptions.Compiled` is especially important – I wouldn't much...