466396 - "TypeError: var x is undefined" with for each, Iterator()

Status: RESOLVED DUPLICATE of bug 420837

(Core :: JavaScript Engine, defect)

Description

[Jesse Ruderman]

for each (var x in [void 0]) { Iterator(); }

Result:
  TypeError: var x is undefined

Expected:
  TypeError: (void 0) is undefined
or:
  TypeError: missing argument 0 when calling function Iterator

A recent addition to jsfunfuzz caught this bug: it now checks the validity of expressions that appear in certain error messages.  "(var x)" is not a valid expression.

Strange that the value of |x| influences an error message that should have nothing to do with |x|.

Comment 1

[Ryan VanderMeulen [:RyanVM]]

With a current js shell:

js> for each (var x in [void 0]) { Iterator(); }
typein:10: TypeError: Iterator is undefined