Index: llvm/tools/llvm-reduce/deltas/Delta.cpp
===================================================================
--- llvm/tools/llvm-reduce/deltas/Delta.cpp
+++ llvm/tools/llvm-reduce/deltas/Delta.cpp
@@ -81,13 +81,17 @@
 
   if (TmpFilesAsBitcode) {
     llvm::raw_fd_ostream OutStream(FD, true);
-    writeBitcode(M, OutStream);
-    OutStream.close();
+
     if (OutStream.has_error()) {
-      errs() << "Error emitting bitcode to file '" << CurrentFilepath << "'!\n";
+      errs() << "Error emitting bitcode to file '" << CurrentFilepath
+             << "': " << OutStream.error().message();
       sys::fs::remove(CurrentFilepath);
       exit(1);
     }
+
+    writeBitcode(M, OutStream);
+    OutStream.close();
+
     bool Res = Test.run(CurrentFilepath);
     sys::fs::remove(CurrentFilepath);
     return Res;
@@ -96,7 +100,8 @@
   M.print(Out.os(), /*AnnotationWriter=*/nullptr);
   Out.os().close();
   if (Out.os().has_error()) {
-    errs() << "Error emitting bitcode to file '" << CurrentFilepath << "'!\n";
+    errs() << "Error emitting bitcode to file '" << CurrentFilepath
+           << "': " << Out.os().error().message();
     exit(1);
   }