Anonymous

diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index 494282b..8af07cf 100644
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -103,6 +103,7 @@ class SignatureGeneratorBasic(SignatureGenerator):
                     data = data + var
             if data is None:
                 bb.error("Task %s from %s seems to be empty?!" % (task, fn))
+                continue
             self.basehash[fn + "." + task] = hashlib.md5(data).hexdigest()
             taskdeps[task] = sorted(alldeps)