handle conversion failure differently

Author: David Ungar

test/Driver/Dependencies/Inputs/update-dependencies-bad.py

@@ -41,10 +41,10 @@
         returncode = subprocess.call([sys.argv[1], "--from-yaml",
                                       "--input-filename=" + primaryFile,
                                       "--output-filename=" + depsFile])
-        # If the input is not valid YAML, just copy it over verbatim;
-        # we're testing a case where we produced a corrupted output file.
         if returncode != 0:
-            shutil.copyfile(primaryFile, depsFile)
+            shutil.rmtree(depsFile, True)
+            print("Failed to convert", os.path.basename(primaryFile))
+            exit(1)
     except ValueError:
         pass
 

test/Driver/Dependencies/Inputs/update-dependencies.py

@@ -48,9 +48,9 @@
                                   "--input-filename=" + primaryFile,
                                   "--output-filename=" + depsFile])
     if returncode != 0:
-        # If the input is not valid YAML, just copy it over verbatim;
-        # we're testing a case where we produced a corrupted output file.
-        shutil.copyfile(primaryFile, depsFile)
+        shutil.rmtree(depsFile, True)
+        print("Failed to convert", os.path.basename(primaryFile))
+        exit(1)
 else:
     primaryFile = None