[SR-15496] Code completion not suggesting members of parameter to closure

[ahoppen]

Previous ID	SR-15496
Radar	rdar://85602411
Original Reporter	@ahoppen
Type	Bug

Additional Detail from JIRA

Votes	0
Component/s	CodeCompletion
Labels	Bug, FoundByStressTester
Assignee	None
Priority	Medium

md5: 40df6f8ed07123e264ce52e6673e2e52

is duplicated by:

• SR-15999 Missing dot member completion inside closure

Issue Description:

The following new test case fails. When removing replacing either let ranges or let nsRange by _, the test case passes.

// RUN: %swift-ide-test --code-completion --code-completion-token COMPLETE --source-filename %s | %FileCheck %s

public func test() {
    let ranges = compactMap { (match) in
        let nsRange = match.#^COMPLETE^#
    }
}

struct Foo {
    var x: String
}

func compactMap(_ transform: (Foo) -> Void) {
    fatalError()
}

// CHECK:     Begin completions, 2 items
// CHECK-DAG: Keyword[self]/CurrNominal:          self[#Foo#];
// CHECK-DAG: Decl[InstanceVar]/CurrNominal:      x[#String#];
// CHECK:     End completions

[ahoppen]

Same underlying issue as #58610