1253282 - browser object does not seem to be deallocated on tab close

Status: RESOLVED INVALID

(Firefox :: Tabbed Browser, defect)

Description

[Olivier Yiptong [:oyiptong]]

Attachment: browser_gc.js

I was writing some code that keeps track of browser objects and while writing tests found that upon closing a tab, the browser objects stayed around.

How to reproduce:

1. Write a test that opens a new tab
2. Keep track of browser object with a weak ref
3. Close the tab

Expected outcome:

Weak ref get() function returns null

Observed outcome:

Weak ref get() function returns a browser object whose documentURI property is nullsy

Comment 1

[Olivier Yiptong [:oyiptong]]

A tests that verifies this behavior is attached.

Line 44 fails because line 22 never runs, because in line 19 the `browser` variable is always assigned a browser object.

Comment 2

[Mike Conley (:mconley) (:⚙️)]

If I bump the timeout to 15 seconds, (and turn the "else" in the numBrowsers loop to an "else if") I get this to pass.

Comment 3

[Olivier Yiptong [:oyiptong]]

it's a non-issue then. I'll mark it as invalid, and chalk it up to my misundertanding of the lifetimes of the objects