`debugDescription` of `KeyPath` may generate incorrect string representations

[almazrafi]

Description

I've encountered an issue where the debugDescription property of KeyPath can produce incorrect string representations.

Reproduction

struct Foo { }
struct Bar { }

struct Foobar {
    let foo: Foo
    let bar: Bar
}

print(\Foobar.foo) // prints: '\Foobar.foo'
print(\Foobar.bar) // prints: '\Foobar.foo'  <-- unexpected, should be '\Foobar.bar'

Expected behavior

The second print statement should output \Foobar.bar, matching the key path's property name.

Environment

swift-driver version: 1.115.1 Apple Swift version 6.0.3 (swiftlang-6.0.3.1.10 clang-1600.0.30.1)
Target: arm64-apple-macosx15.0

Additional information

No response

[jamieQ]

looks kind of similar to #79721 which was closed as 'not planned'. this comment may be relevant: #79721 (comment)

[almazrafi]

looks kind of similar to #79721 which was closed as 'not planned'. this comment may be relevant: #79721 (comment)

No, this issue is not related to optimization and occurs even with optimization disabled (-O0).