[SR-13275] Clang module breadcrumbs remaining in binaries even with '-no-clang-module-breadcrumbs'

[thii]

Previous ID	SR-13275
Radar	rdar://problem/66058061
Original Reporter	@thii
Type	Bug

Attachment: Download

Additional Detail from JIRA

Votes	1
Component/s	LLDB for Swift
Labels	Bug
Assignee	@adrian-prantl
Priority	Medium

md5: a04ada4e3d0a10ab980e02c3c4c34a51

Issue Description:

Consider the following code:

import Foundation

extension NSString {
    func test() {
        let _ = NSMakeRange(1, 2)
    }
}

When compiling with the following flag:

-Xfrontend -no-clang-module-breadcrumbs

it still produces a binary that has the Clang module breadcrumbs being embedded.

[adrian-prantl]

@swift-ci create

[swift-ci]

Comment by Richard (JIRA)

This should have been resolved by swiftlang/swift#37839

[keith]

richardh (JIRA User) related to the comment on the PR about limiting debug-ability, did you notice any specific downsides in that fix?

[swift-ci]

Comment by Richard (JIRA)

It was only an improvement on our end as otherwise you would end up with lots of debugger errors about missing clang modules and types.

[keith]

@adrian-prantl are there some specifics to look out for here?

[keith]

I think everything is resolved here, except knowing specifics of the downsides of this flag. @adrian-prantl Are there other issues you know about?

[adrian-prantl]

Sounds good, thanks!