diff --git a/bolt/lib/Rewrite/RewriteInstance.cpp b/bolt/lib/Rewrite/RewriteInstance.cpp
--- a/bolt/lib/Rewrite/RewriteInstance.cpp
+++ b/bolt/lib/Rewrite/RewriteInstance.cpp
@@ -3065,6 +3065,10 @@
   emitBinaryContext(*Streamer, *BC, getOrgSecPrefix());
 
   Streamer->Finish();
+  if (Streamer->getContext().hadError()) {
+    errs() << "BOLT-ERROR: Emission failed.\n";
+    exit(1);
+  }
 
   //////////////////////////////////////////////////////////////////////////////
   // Assign addresses to new sections.
@@ -3094,7 +3098,7 @@
 
   RTDyld->finalizeWithMemoryManagerLocking();
   if (RTDyld->hasError()) {
-    outs() << "BOLT-ERROR: RTDyld failed: " << RTDyld->getErrorString() << "\n";
+    errs() << "BOLT-ERROR: RTDyld failed: " << RTDyld->getErrorString() << "\n";
     exit(1);
   }