Index: lib/StaticAnalyzer/Core/BugReporter.cpp
===================================================================
--- lib/StaticAnalyzer/Core/BugReporter.cpp
+++ lib/StaticAnalyzer/Core/BugReporter.cpp
@@ -3251,6 +3251,12 @@
       return;
   }

+  // Suppress BugReports which originate from system headers (located beneath
+  // an -isystem include path).
+  if (getSourceManager().isInSystemHeader(
+          R->getLocation(getSourceManager()).asLocation()))
+    return;
+
   bool ValidSourceLoc = R->getLocation(getSourceManager()).isValid();
   assert(ValidSourceLoc);
   // If we mess up in a release build, we'd still prefer to just drop the bug