465902 - TM: wrong number (involves |let|, global, six times through outer loop)

Status: VERIFIED WORKSFORME

(Core :: JavaScript Engine, defect, P2)

Description

[Jesse Ruderman]

for (let j = 0; j < 6; ++j) {
  e = 3; 
  for each (let c in [10, 20, 30]) { 
    print("" + e);
    e = c; 
  }
}
delete e;

Does fine for the first five(!!) times through the outer loop, correctly printing these three values as it goes through the inner loop:
3
10
20

But the sixth time through the outer loop, it prints this instead:
3
3.0000000000000044       <-- wtf?
20

Comment 1

[David Mandelin [:dmandelin]]

I'm pretty sure this is a dup of 465915. I'll mark it as blocked by that bug for now.

Comment 2

[Jesse Ruderman]

Yep, the fix for bug 469044 (which fixed bug 465915) seems to have fixed this as well.  Andreas, want to add this testcase too?

Comment 3

[Andreas Gal :gal]

Yeah we should have this test-case too. Add it to trace-tests. If you need help just assign the bug to me and I will do it.

Comment 4

[Jesse Ruderman]

trace-test added in rev d5da9351d606

Comment 5

[Robert Sayre]

http://hg.mozilla.org/releases/mozilla-1.9.2/rev/8c056339ad43

Comment 6

[Bob Clary [:bc] (inactive)]

v 1.9.3, 1.9.2