Closed
Bug 1476321
Opened 6 years ago
Closed 6 years ago
SpiderMonkey should throw ReferenceError on invalid left-hand side expression (++ ++)
Categories
(Core :: JavaScript Engine, defect)
Core
JavaScript Engine
Tracking
()
RESOLVED
DUPLICATE
of bug 1340307
People
(Reporter: iigor.simoes, Unassigned)
Details
User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.87 Safari/537.36 OPR/54.0.2952.54 Steps to reproduce: Hi everyone, according to ES6 (https://www.ecma-international.org/ecma-262/8.0/index.html#sec-update-expressions-static-semantics-early-errors), should throw ReferenceError if the expression is not valid on UnaryExpression. OS: Ubuntu 16.04 x64 version: 62.0b8 var a = 1; eval('++ ++ a;') Actual results: SyntaxError: expected expression, got '++' Expected results: ReferenceError: Invalid left-hand side expression in prefix operation (v8) or ReferenceError: Prefix ++ operator applied to value that is not a reference (jsc)
V8, Chakra, JSC and XS works as expected. #### JavaScriptCore ReferenceError: Prefix ++ operator applied to value that is not a reference. #### V8 ReferenceError: Invalid left-hand side expression in prefix operation #### Chakra ReferenceError: Invalid left-hand side in assignment #### XS ReferenceError: no reference #### SpiderMonkey SyntaxError: expected expression, got '++':
Updated•6 years ago
|
Status: UNCONFIRMED → NEW
Component: Untriaged → JavaScript Engine
Ever confirmed: true
Product: Firefox → Core
Updated•6 years ago
|
Status: NEW → RESOLVED
Closed: 6 years ago
Resolution: --- → DUPLICATE
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Description
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