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-rw-r--r--buildstream/_options/optionpool.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/buildstream/_options/optionpool.py b/buildstream/_options/optionpool.py
index 42b1baa9a..0bb366020 100644
--- a/buildstream/_options/optionpool.py
+++ b/buildstream/_options/optionpool.py
@@ -243,8 +243,8 @@ class OptionPool():
# Return true if a conditional was processed.
#
def _process_one_node(self, node):
- conditions = _yaml.node_get(node, list, '(?)', default_value=[]) or None
- assertion = _yaml.node_get(node, str, '(!)', default_value='') or None
+ conditions = _yaml.node_get(node, list, '(?)', default_value=None)
+ assertion = _yaml.node_get(node, str, '(!)', default_value=None)
# Process assersions first, we want to abort on the first encountered
# assertion in a given dictionary, and not lose an assertion due to