adding more error catching to diagnose the problem reported by Ken Hofsass...

adding more error catching to diagnose the problem reported by Ken Hofsass (offline discussion) about the sudden disappearance of the launch thread.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@10154 71c3de6d-444a-0410-be80-ed276b4c234a

core/src/main/java/hudson/slaves/CommandLauncher.java

@@ -85,6 +85,10 @@ public class CommandLauncher extends ComputerLauncher {
             LOGGER.info("slave agent launched for " + computer.getDisplayName());
         } catch (InterruptedException e) {
             e.printStackTrace(listener.error("aborted"));
+        } catch (RuntimeException e) {
+            e.printStackTrace(listener.error("Unexpected error in launching a slave. This is probably a bug in Hudson"));
+        } catch (Error e) {
+            e.printStackTrace(listener.error("Unexpected error in launching a slave. This is probably a bug in Hudson"));
         } catch (IOException e) {
             Util.displayIOException(e, listener);