674085 - TI+JM: Assertion failure: [infer failure] Missing type pushed 0: float, at jsinfer.cpp:331

Status: RESOLVED FIXED

(Core :: JavaScript Engine, defect)

Description

[Jan de Mooij [:jandem]]

--
function f(x) {
    for (var i = 0; i < 50; i++) {};
    [1][arguments[0]]++;
    x = 1.2;
}
f(0);
--
$ ./js -n -m test.js
Missing type at #2:00039 pushed 0: float
Assertion failure: [infer failure] Missing type pushed 0: float, at jsinfer.cpp:331

Revision 62f32efb087c, 32-bit OS X.

Comment 1

[Brian Hackett [Laid off!]]

Mark an unknown result when the value output of FetchElementId is not an integer, rather than the resulting id.  (Somehow thought that FetchElementId canonicalized doubles/string values representable as integers, should have tested).

http://hg.mozilla.org/projects/jaegermonkey/rev/c8e6ad4e09d1