oeqa/selftest/imagefeatures: dump the JSON if it can't be parsed

Signed-off-by: Ross Burton <ross.burton@intel.com>

diff --git a/meta/lib/oeqa/selftest/cases/imagefeatures.py b/meta/lib/oeqa/selftest/cases/imagefeatures.py
index afc629f29cdfc6348f3d1c379bb5af624b400320..8213d63e375430f159dcaf554b42d990adf0b73c 100644 (file)
--- a/meta/lib/oeqa/selftest/cases/imagefeatures.py
+++ b/meta/lib/oeqa/selftest/cases/imagefeatures.py
@@ -161,7 +161,8 @@ class ImageFeatures(OESelftestTestCase):
             sysroot = get_bb_var('STAGING_DIR_NATIVE', 'core-image-minimal')
             result = runCmd('qemu-img info --output json %s' % image_path,
                             native_sysroot=sysroot)
-            self.assertTrue(json.loads(result.output).get('format') == itype)
+            self.assertTrue(json.loads(result.output).get('format') == itype,
+                            msg="Could not parse '%s'" % result.output)
 
     def test_long_chain_conversion(self):
         """