diff --git a/bitbake/lib/bb/ui/knotty.py b/bitbake/lib/bb/ui/knotty.py
index ea20ddc7e0..09a4e0cdcc 100644
--- a/bitbake/lib/bb/ui/knotty.py
+++ b/bitbake/lib/bb/ui/knotty.py
@@ -536,24 +536,29 @@ def main(server, eventHandler, params, tf = TerminalFilter):
             if not params.observe_only:
                 _, error = server.runCommand(["stateForceShutdown"])
             main.shutdown = 2
-    summary = ""
-    if taskfailures:
-        summary += pluralise("\nSummary: %s task failed:",
-                             "\nSummary: %s tasks failed:", len(taskfailures))
-        for failure in taskfailures:
-            summary += "\n  %s" % failure
-    if warnings:
-        summary += pluralise("\nSummary: There was %s WARNING message shown.",
-                             "\nSummary: There were %s WARNING messages shown.", warnings)
-    if return_value and errors:
-        summary += pluralise("\nSummary: There was %s ERROR message shown, returning a non-zero exit code.",
-                             "\nSummary: There were %s ERROR messages shown, returning a non-zero exit code.", errors)
-    if summary:
-        print(summary)
+    try:
+         summary = ""
+         if taskfailures:
+             summary += pluralise("\nSummary: %s task failed:",
+                                  "\nSummary: %s tasks failed:", len(taskfailures))
+             for failure in taskfailures:
+                 summary += "\n  %s" % failure
+         if warnings:
+             summary += pluralise("\nSummary: There was %s WARNING message shown.",
+                                  "\nSummary: There were %s WARNING messages shown.", warnings)
+         if return_value and errors:
+             summary += pluralise("\nSummary: There was %s ERROR message shown, returning a non-zero exit code.",
+                                  "\nSummary: There were %s ERROR messages shown, returning a non-zero exit code.", errors)
+         if summary:
+             print(summary)
 
-    if interrupted:
-        print("Execution was interrupted, returning a non-zero exit code.")
-        if return_value == 0:
-            return_value = 1
+         if interrupted:
+             print("Execution was interrupted, returning a non-zero exit code.")
+             if return_value == 0:
+                 return_value = 1
+    except IOError as e:
+        import errno
+        if e.errno == errno.EPIPE:
+            pass
 
     return return_value