Xcode crashes when adding documentation to method

Originator:hotngui
Number:rdar://FB7614990 Date Originated:3/5/2020
Status:Open Resolved:
Product:Xcode Product Version:11.3.1
Classification:Crash Reproducible:Yes
 
If I create a method with the following signature and then attempt to execute the Add Documentation command Xcode crashes. The syntax in example A below is not exactly right, and the compiler does not complain. It however crashes immediately.

a)  public func dummy(_: String, second: Int) {}
b)  public func dummy(_ first: String, second: Int) {}

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