Bug 159270

Summary:	Spurious "Can't create duplicate variable that shadows a global property"
Product:	WebKit	Reporter:	Domenic Denicola <d>
Component:	JavaScriptCore	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED DUPLICATE
Severity:	Normal	CC:	cdumez, fpizlo, saam
Priority:	P2
Version:	Safari Technology Preview
Hardware:	Mac
OS:	OS X 10.11

Description Domenic Denicola 2016-06-29 12:44:36 PDT

https://settings-object-worker-client-ckrcsrtdqr.now.sh/ (source at https://settings-object-worker-client-ckrcsrtdqr.now.sh/_src) triggers "SyntaxError: Can't create duplicate variable that shadows a global property: 'c'"

The window has a named property 'c' since I declare an <iframe> with id="c". But then I tried to do `const c = document.querySelector("#c").contentWindow` and got that error.

That error does not appear in other browsers, and I believe has no support in the specs. (Not that window.c is supposed to be configurable.)

Comment 1 Saam Barati 2016-06-29 22:43:50 PDT

Indeed. This is wrong and we already have a bug open to fix it.

Comment 2 Saam Barati 2016-06-29 22:44:37 PDT


*** This bug has been marked as a duplicate of bug 148763 ***