[SR-10813] DispatchWorkItem leak on armv7

[swift-ci]

Previous ID	SR-10813
Radar	None
Original Reporter	Pogonets (JIRA User)
Type	Bug

Additional Detail from JIRA

Votes	0
Component/s	libdispatch
Labels	Bug, Leak
Assignee	None
Priority	Medium

md5: 5987bd4bd4977311481d967a3a2e3298

Issue Description:

We found memory leak with DispatchWorkItem on android-armv7
After a quick research, this leak doesn't reproduce on linux x86_64 and android arm64
So looks like it affects all 32bit platforms
Here is a sample:

import Dispatch

let group = DispatchGroup()
let queue = DispatchQueue.global()

class A {
    deinit {
        print("deinit")
    }
}

func test() {
    let a = A()
    queue.async(group: group, execute: DispatchWorkItem {
        print(a)
    })
}

test()
group.wait()

deinit not called
And without DispatchWorkItem this code also works fine

[belkadan]

cc mww (JIRA User)