Squashed 'import-layers/yocto-poky/' changes from dc8508f6099..67491b0c104

Yocto 2.2.2 (Morty)

Change-Id: Id9a452e28940d9f166957de243d9cb1d8818704e
git-subtree-dir: import-layers/yocto-poky
git-subtree-split: 67491b0c104101bb9f366d697edd23c895be4302
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/import-layers/yocto-poky/bitbake/lib/bb/utils.py b/import-layers/yocto-poky/bitbake/lib/bb/utils.py
index 729848a..16fc9db 100644
--- a/import-layers/yocto-poky/bitbake/lib/bb/utils.py
+++ b/import-layers/yocto-poky/bitbake/lib/bb/utils.py
@@ -378,7 +378,7 @@
 
         # If the exception is from spwaning a task, let's be helpful and display
         # the output (which hopefully includes stderr).
-        if isinstance(value, subprocess.CalledProcessError):
+        if isinstance(value, subprocess.CalledProcessError) and value.output:
             error.append("Subprocess output:")
             error.append(value.output.decode("utf-8", errors="ignore"))
     finally: