Merge pull request swiftlang#197 from ddunbar/rdar35403456

[BuildSystem] Fix symlink output value if the output is ever missing.
dmbryson · Nov 9, 2017 · 177bbca · 177bbca
2 parents 8d54d1d + 5c24bb9
commit 177bbca
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/lib/BuildSystem/BuildSystem.cpp b/lib/BuildSystem/BuildSystem.cpp
@@ -2076,7 +2076,10 @@ class SymlinkCommand : public Command {
     // result for the output.
     assert(value.isSuccessfulCommand());
 
-    return BuildValue::makeExistingInput(value.getOutputInfo());
+    auto info = value.getOutputInfo();
+    if (info.isMissing())
+        return BuildValue::makeMissingOutput();
+    return BuildValue::makeExistingInput(info);
   }
 
   virtual bool isResultValid(BuildSystem& system,