Comment #25 on issue 2355 by [email protected]: Implement generators
http://code.google.com/p/v8/issues/detail?id=2355
Found a slight bug… Example code:
({ ok: true, fn: function*(a) { this.ok } }).fn(0).next();
This code works fine on x64 builds, but crashes on ia32 when it attempts to
run "this.ok", because "this" appears to be in "the hole".
I tracked the problem down to that the EmitGeneratorResume-function appears
to be pushing two arguments onto the stack for every formal argument
defined on the function, making the example code create a stack like:
[02] : 0x5a0080a1 <the hole>
[01] : 0x5a0080a1 <the hole>
[00] : 0x22714589 <an Object with map 0x5fc0ae71>#3#
`this` then gets assigned to the value at 01 instead of 00.. I ran a test
where i fixed the stack up afterwards which appears to fix the problem and
verified that on x64 where the code works, the stack looks right.
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