Fix runtime error in self-update (release 1.1)#416

cmcgee1024 merged 1 commit intoswiftlang:release/1.1swiftlang/swiftly:release/1.1from

cmcgee1024:fix_selfupdate_release_1_1cmcgee1024/swiftly:fix_selfupdate_release_1_1Copy head branch name to clipboard