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Status
()
People
(Reporter: anba, Unassigned)
Tracking
(Blocks: 1 bug)
Firefox Tracking Flags
(firefox52 affected)
Details
Test case:
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var f = "x";
eval("print(f); { function f(){} }")
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Expected: Prints "undefined"
Actual: Prints "x"
V8 and Chakra print "x", JSC prints "function f() { }".
ES2017 spec: B.3.3.3, step 7.a.i.i
https://tc39.github.io/ecma262/#sec-web-compat-evaldeclarationinstantiation
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Comment 2•2 years ago
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This is patently bizarre and seems like a spec bug. Why should an Annex B synthesized var unconditionally overwrite an existing global var? I'll ask committee.
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Comment 3•2 years ago
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The ecma262 related to this is https://github.com/tc39/ecma262/issues/753.
See Also: → https://github.com/tc39/ecma262/issues/753
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Comment 4•2 years ago
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TC39 reached consensus that this peculiarity was a spec bug, so marking as INVALID.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Flags: needinfo?(shu)
Resolution: --- → INVALID
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Description
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