My diagnostics fix fixed this test along the way.

lattner · lattner · commit 8d835dee7cbc · 2016-01-11T20:47:47.000-08:00
diff --git a/validation-test/compiler_crashers_fixed/28197-swift-typebase-getdesugaredtype.swift b/validation-test/compiler_crashers_fixed/28197-swift-typebase-getdesugaredtype.swift
@@ -1,4 +1,4 @@
-// RUN: not --crash %target-swift-frontend %s -parse
+// RUN: not %target-swift-frontend %s -parse
 
 // Distributed under the terms of the MIT license
 // Test case submitted to project by https://github.com/practicalswift (practicalswift)

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-// RUN: not --crash %target-swift-frontend %s -parse`
	`1`	`+// RUN: not %target-swift-frontend %s -parse`
`2`	`2`
`3`	`3`	`// Distributed under the terms of the MIT license`
`4`	`4`	`// Test case submitted to project by https://github.com/practicalswift (practicalswift)`