[fix] Fix crash when comparing invalid dict literal (#2796)

Author: Synrom

ChangeLog

@@ -7,6 +7,10 @@ What's New in astroid 4.0.0?
 ============================
 Release date: TBA
 
+* Fix crash when comparing invalid dict literal
+
+  Closes #2522
+
 * Removed internal functions ``infer_numpy_member``, ``name_looks_like_numpy_member``, and
   ``attribute_looks_like_numpy_member`` from ``astroid.brain.brain_numpy_utils``.
 

astroid/nodes/node_classes.py

@@ -1851,7 +1851,7 @@ def last_child(self):
     # TODO: move to util?
     @staticmethod
     def _to_literal(node: SuccessfulInferenceResult) -> Any:
-        # Can raise SyntaxError or ValueError from ast.literal_eval
+        # Can raise SyntaxError, ValueError, or TypeError from ast.literal_eval
         # Can raise AttributeError from node.as_string() as not all nodes have a visitor
         # Is this the stupidest idea or the simplest idea?
         return ast.literal_eval(node.as_string())
@@ -1887,7 +1887,7 @@ def _do_compare(
 
             try:
                 left, right = self._to_literal(left), self._to_literal(right)
-            except (SyntaxError, ValueError, AttributeError):
+            except (SyntaxError, ValueError, AttributeError, TypeError):
                 return util.Uninferable
 
             try:

tests/test_regrtest.py

@@ -543,3 +543,10 @@ class a: ...
     )
     assert isinstance(node, nodes.ClassDef)
     assert node.name == "a"
+
+
+def test_regression_infer_dict_literal_comparison_uninferable() -> None:
+    """Regression test for issue #2522."""
+    node = extract_node("{{}}>0")
+    inferred = next(node.infer())
+    assert inferred.value == Uninferable