445815 - ActionScript 3 RegExp bug with look behind behavior

Status: RESOLVED WONTFIX

(Tamarin Graveyard :: Virtual Machine, defect)

Description

[Chris Peyer]

Steps to reproduce:
1. Create new regexp expression: var testExpr:RegExp = /(?<=/\*(?:[^*]|\*[^*/])*)(@\w*)/gm
2. Make a test string which looks like this: 
/**
 * Blah
 * 
 * @author1 blahBlah
 */
 * @author2 blahBlah
3. run code testExpr.exec(testString);

 Actual Results:
Look behind expression works alright if used alone but doesnt seem to function in case if it's used as look behind.
 
 Expected Results:
Expression should select all @\w documentation comment tags which are located inside unclosed block comments.
In above example if should select @author1 and leave ignored @author2.
Also that is exactly what happens in other regexp environments that support variable length positive look behind blocks I've tested that expression in.
 
 Workaround (if any):

Comment 1

[Chris Peyer]

Transferred from: https://bugs.adobe.com/jira/browse/ASC-3399

Comment 2

[Steven Johnson]

Any fix for this would likely have to be version-checked for backwards compatibility.

Comment 3

[Sylvestre Ledru [:Sylvestre]]

No assignee, updating the status.

Comment 4

[Sylvestre Ledru [:Sylvestre]]

No assignee, updating the status.