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-rw-r--r--mesonbuild/ast/introspection.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/mesonbuild/ast/introspection.py b/mesonbuild/ast/introspection.py
index 5a12e29..f8fb2e8 100644
--- a/mesonbuild/ast/introspection.py
+++ b/mesonbuild/ast/introspection.py
@@ -35,7 +35,8 @@ class IntrospectionHelper:
class IntrospectionInterpreter(AstInterpreter):
# Interpreter to detect the options without a build directory
# Most of the code is stolen from interperter.Interpreter
- def __init__(self, source_root, subdir, backend, visitors=[], cross_file=None, subproject='', subproject_dir='subprojects', env=None):
+ def __init__(self, source_root, subdir, backend, visitors=None, cross_file=None, subproject='', subproject_dir='subprojects', env=None):
+ visitors = visitors if visitors is not None else []
super().__init__(source_root, subdir, visitors=visitors)
options = IntrospectionHelper(cross_file)