Bug 249146 – Regular expression fails in WebKit only: invalid group specifier name

• Component: JavaScriptCore
• Status: RESOLVED DUPLICATE

[Vladimir Prelovac]

The following regular expression works in Chrome and Firefox,  but fails in WebKit:

let tokens = "test".match(/(?<=\s+|^)["'‘“'"[({⟨]?(.*?[.?!])(\s[.?!])*["'’”'"\])}⟩]?(?=\s+|$)|(?<=\s+|^)\S(.*?[.?!])(\s[.?!])*(?=\s+|$)/g);

SyntaxError: Invalid regular expression: invalid group specifier name

[Radar WebKit Bug Importer]

<rdar://problem/103461779>

[Michael Saboff]

This was fixed with commit 257823@main (46e6b3f97425): <https://commits.webkit.org/257823@main>.

*** This bug has been marked as a duplicate of bug 174931 ***

[Vladimir Prelovac]

(In reply to Michael Saboff from comment #2)
> This was fixed with commit 257823@main (46e6b3f97425):
> <https://commits.webkit.org/257823@main>.
> 
> *** This bug has been marked as a duplicate of bug 174931 ***

I've compiled trunk with the patch in and want to report that this problem is still not fixed.

[Mark Lam]

(In reply to Vladimir Prelovac from comment #3)
> > *** This bug has been marked as a duplicate of bug 174931 ***
> 
> I've compiled trunk with the patch in and want to report that this problem
> is still not fixed.

Are you sure you're building the latest trunk?  I just tried against trunk also, and I also no longer see that SyntaxError.  Looks fixed to me.

[Vladimir Prelovac]

(In reply to Mark Lam from comment #4)
> (In reply to Vladimir Prelovac from comment #3)
> > > *** This bug has been marked as a duplicate of bug 174931 ***
> > 
> > I've compiled trunk with the patch in and want to report that this problem
> > is still not fixed.
> 
> Are you sure you're building the latest trunk?  I just tried against trunk
> also, and I also no longer see that SyntaxError.  Looks fixed to me.

Thanks for double checking. I did indeed pull the trunk an hour ago and verified it is latest trunk by verifying the patch was applied. (for example Source/JavaScriptCore/runtime/RegExp.cpp line 252 is " && !pattern.m_containsLookbehinds") The Webkit version also shows as 615.1.15+

Then I went to https://runjs.co (since don't have inspector in minibrowser/run-safari) and ran:

let tokens = "test".match(/(?<=\s+|^)["'‘“'"[({⟨]?(.*?[.?!])(\s[.?!])*["'’”'"\])}⟩]?(?=\s+|$)|(?<=\s+|^)\S(.*?[.?!])(\s[.?!])*(?=\s+|$)/g);

Producing:
SyntaxError: Invalid regular expression: invalid group specifier name

[Vladimir Prelovac]

My bad, run-minibrowser does not produce error, run-safari does, so I will assume that the problem is on my end. Thanks.