Status: New
Owner: ----
New issue 3339 by [email protected]: Incomplete lexical environment
in debugger
http://code.google.com/p/v8/issues/detail?id=3339
This issue was observed in v8 3.24.35.33
I have inferred that v8 performs an optimization pass to remove unused
variables from the lexical environment of a function.
Consider the following code:
function foo(bar) {
$('#foo').click(function() {
console.log('clicked!'); // Place breakpoint here.
});
}
foo('hello v8 devs');
The variable `bar` is not referenced within the anonymous function,
and is optimized away. I was surprised that when I entered the
debugger via a breakpoint on the third line that `bar` evaluated to
undefined!
Refering to `bar` in the source code works as expected:
function foo(bar) {
$('#foo').click(function() {
console.log(bar); // Place breakpoint here.
});
}
Shouldn't the full lexical environment be available when debugging?
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