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-rw-r--r--lib/bb/siggen.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/bb/siggen.py b/lib/bb/siggen.py
index 40085b9c5..542bbb9d1 100644
--- a/lib/bb/siggen.py
+++ b/lib/bb/siggen.py
@@ -564,7 +564,8 @@ def calc_taskhash(sigdata):
data = data + sigdata['runtaskhashes'][dep]
for c in sigdata['file_checksum_values']:
- data = data + c[1]
+ if c[1]:
+ data = data + c[1]
if 'taint' in sigdata:
if 'nostamp:' in sigdata['taint']: