[SR-3132] Invalid pointer dequeued from free list. Runtime crash on some weird code.

[swift-ci]

Previous ID	SR-3132
Radar	rdar://problem/34992686
Original Reporter	plivesey (JIRA User)
Type	Bug
Status	Resolved
Resolution	Done

Additional Detail from JIRA

Votes	1
Component/s	Compiler
Labels	Bug, RunTimeCrash
Assignee	@slavapestov
Priority	Medium

md5: e5a714538eff95d9400fe430806b9c2a

Issue Description:

Run the following code (sometimes works in a playground):

class X {
    public init?(error: (String) throws ->Void) rethrows {
        try error("dictionary is not valid!")
        return nil
    }

    public convenience init() throws {
        try self.init() { _ in
            throw NSError(domain: "", code: 0, userInfo: nil)
            }!
    }
}     
   
do {
    let x = try X()
} catch {
    print("hi")
}

Expected: Either this should not compile, or it should EXC_BAD_ACCESS because of the ! (even though I feel like it should throw out of there? maybe not...as I said, the code is weird).

Actual:

malloc: *** error for object 0x6080000174ac: Invalid pointer dequeued from free list
-   -   -   set a breakpoint in malloc_error_break to debug

[belkadan]

I think the correct behavior of this code is to throw all the way out. It certainly shouldn't crash in malloc. @jckarter, @slavapestov, does this look familiar?

[slavapestov]

@swift-ci create

[slavapestov]

#12454