Fix crash when an attribute node was used inside an unary op (#8209)

Closes #8207

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/functional/r/regression_02/regression_8207.py b/tests/functional/r/regression_02/regression_8207.py
new file mode 100644
index 000000000..6538018bc
--- /dev/null
+++ b/tests/functional/r/regression_02/regression_8207.py
@@ -0,0 +1,14 @@
+"""Regression test for 8207."""
+
+# pylint: disable=missing-docstring,too-few-public-methods
+
+class Example:
+    def __init__(self):
+        self.offset = -10
+
+    def minus_offset(self):
+        return {
+            (x, x): value
+            for x, row in enumerate([(5, 10), (20, 30)])
+            for y, value in enumerate(row, -self.offset)
+        }