Segmentation fault 11 when using illegal string interpolation in Xcode 10

Originator:oetjen
Number:rdar://45330067 Date Originated:2018-10-17
Status:open Resolved:
Product:Xcode Product Version:10
Classification:bug Reproducible:always
 
Summary:
When using an illegal string interpolation (e.g. we expect an compiler error), the compiler instead crashes with "Segmentation fault: 11"

Steps to Reproduce:
The following code will crash Xcode 10
    let foo:String? = "bar"
    print("foo is: \(describing:foo)"); // instead of String(describing:foo)

Expected Results:
Compiler error

Actual Results:
Compiler crash

Version/Build:
Xcode 10

Comments


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!