[jbosstools-issues] [JBoss JIRA] (ERT-433) Invalid octal escape sequence (\8) causes IllegalArgumentException [EBZ#501790]

[Friendly Jira Robot (JIRA)]

Friendly Jira Robot created ERT-433:
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             Summary: Invalid octal escape sequence (\8) causes IllegalArgumentException [EBZ#501790]
                 Key: ERT-433
                 URL: https://issues.jboss.org/browse/ERT-433
             Project: Eclipse Release Train
          Issue Type: Task
          Components: JSDT
            Reporter: Friendly Jira Robot
            Priority: Critical


Created attachment 264269
Stack Trace

Any file containing a string with '\8' or '\9' in it will cause an IllegalArgumentException whenever ASTParser executes on it. This prevents the JavaScript editor from being initialized, preventing normal opening of the file.

'\#' in pre ES5 is used to denote an octal escape sequence, and so \8 and \9 are indeed invalid, but this should be reported as an error in the file. 

The error is thrown in org.eclipse.wst.jsdt.core.util.JsStringScanner#scanEscape() and is not caught.

To reproduce: create a new JavaScript file, add the line `var x = "\8"` to it, 
and attempt to save the file.



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