Raise a ValueError if there's no body to extract from in extract_node()

1 files changed, 3 insertions, 0 deletions

diff --git a/astroid/builder.py b/astroid/builder.py
index dec83674..549379a7 100644
--- a/astroid/builder.py
+++ b/astroid/builder.py
@@ -389,6 +389,9 @@ def extract_node(code, module_name=''):
             requested_lines.append(idx + 1)
 
     tree = parse(code, module_name=module_name)
+    if not tree.body:
+        raise ValueError('Empty tree, cannot extract from it')
+
     extracted = []
     if requested_lines:
         extracted = [_find_statement_by_line(tree, line) for line in requested_lines]