Merge branch 'stable-5.1'

* stable-5.1:
  Fix logging null if called process fails

Change-Id: Iba771dd8d680b154cb628c7571a2bbc2ecf50a3b
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit/src/org/eclipse/jgit/util/FS.java

@@ -640,13 +640,16 @@ public abstract class FS {
 							JGitText.get().commandClosedStderrButDidntExit,
 							desc, PROCESS_EXIT_TIMEOUT), -1);
 					fail.set(true);
+					return false;
 				}
 			} catch (InterruptedException e) {
-				LOG.error(MessageFormat.format(
-						JGitText.get().threadInterruptedWhileRunning, desc), e);
-			}
+				setError(originalError, MessageFormat.format(
+						JGitText.get().threadInterruptedWhileRunning, desc), -1);
+				fail.set(true);
 				return false;
 			}
+			return true;
+		}
 
 		private void setError(IOException e, String message, int exitCode) {
 			exception.set(e);