[SR-12139] [Swift 5.2] 'mutating' printed twice in quick help

[johnfairh]

Previous ID	SR-12139
Radar	rdar://problem/59302411
Original Reporter	@johnfairh
Type	Bug
Status	Resolved
Resolution	Done

Attachment: Download

Environment

Swift 5.2 from Xcode 11.4 beta 1 (11N111s)

Apple Swift version 5.2 (swiftlang-1103.0.22 clang-1103.0.22)

Additional Detail from JIRA

Votes	0
Component/s	Source Tooling
Labels	Bug
Assignee	@AnthonyLatsis
Priority	Medium

md5: c5d6f02fa61f62dfe5c10ed4c1db8153

is duplicated by:

• SR-12527 The mutating keyword is duplicated and displayed.

Issue Description:

'mutating' keyword prints twice in quick-help style ASTPrinter. `--print-ast` is fine.

Affects structs as well as protocols.

Maybe #24277, wild guess on 'mutating' showing up @AnthonyLatsis ?

[AnthonyLatsis]

Hmm.. @rintaro do you know if Quick Help uses ASTPrinter?

[johnfairh]

It does; an easier way to see the problem is via `swift-ide-test`:

; cat Mut.swift 
struct S {
  mutating func f() {}
}
; swift-ide-test --print-swift-file-interface -source-filename=Mut.swift 

internal struct S {

    mutating internal mutating func f()
}

[AnthonyLatsis]

I see, thanks. It could very well be #​24277, despite the validation tests. I'll take responsibility for this as soon as I can

[beccadax]

@swift-ci create

[AnthonyLatsis]

#30011

[johnfairh]

Thanks for pursuing this!