Put @_sematics on its own line, thanks to Erik Eckstein for the comment.

scallanan · scallanan · commit ea1f83523f53 · 2016-08-12T10:02:32.000-07:00
diff --git a/stdlib/public/core/DebuggerSupport.swift b/stdlib/public/core/DebuggerSupport.swift
@@ -283,7 +283,8 @@ public enum _DebuggerSupport {
     }
   }
 
-  @_semantics("stdlib_binary_only") public static func stringForPrintObject(_ value: Any) -> String {
+  @_semantics("stdlib_binary_only")
+  public static func stringForPrintObject(_ value: Any) -> String {
     var maxItemCounter = Int.max
     var refs = Set<ObjectIdentifier>()
     var targetStream = ""

Original file line number	Diff line number	Diff line change
`@@ -283,7 +283,8 @@ public enum _DebuggerSupport {`
`283`	`283`	`}`
`284`	`284`	`}`
`285`	`285`
`286`		`- @_semantics("stdlib_binary_only") public static func stringForPrintObject(_ value: Any) -> String {`
	`286`	`+ @_semantics("stdlib_binary_only")`
	`287`	`+ public static func stringForPrintObject(_ value: Any) -> String {`
`287`	`288`	`var maxItemCounter = Int.max`
`288`	`289`	`var refs = Set<ObjectIdentifier>()`
`289`	`290`	`var targetStream = ""`