Fix lambda handling for B010 (#685)

src/check_ast.rs

@@ -1075,11 +1075,11 @@ where
                     flake8_bugbear::plugins::getattr_with_constant(self, expr, func, args);
                 }
                 if self.settings.enabled.contains(&CheckCode::B010) {
-                    if self
-                        .scopes
+                    if !self
+                        .scope_stack
                         .iter()
                         .rev()
-                        .all(|scope| !matches!(scope.kind, ScopeKind::Lambda))
+                        .any(|index| matches!(self.scopes[*index].kind, ScopeKind::Lambda))
                     {
                         flake8_bugbear::plugins::setattr_with_constant(self, expr, func, args);
                     }
@@ -2254,7 +2254,7 @@ impl<'a> Checker<'a> {
         while let Some((expr, scopes, parents)) = self.deferred_lambdas.pop() {
             self.parent_stack = parents;
             self.scope_stack = scopes;
-            self.push_scope(Scope::new(ScopeKind::Function(Default::default())));
+            self.push_scope(Scope::new(ScopeKind::Lambda));
 
             if let ExprKind::Lambda { args, body } = &expr.node {
                 self.visit_arguments(args);

src/snapshots/ruff__linter__tests__B010_B009_B010.py.snap

@@ -2,5 +2,36 @@
 source: src/linter.rs
 expression: checks
 ---
-[]
+- kind: SetAttrWithConstant
+  location:
+    row: 33
+    column: 0
+  end_location:
+    row: 33
+    column: 25
+  fix: ~
+- kind: SetAttrWithConstant
+  location:
+    row: 34
+    column: 0
+  end_location:
+    row: 34
+    column: 29
+  fix: ~
+- kind: SetAttrWithConstant
+  location:
+    row: 35
+    column: 0
+  end_location:
+    row: 35
+    column: 28
+  fix: ~
+- kind: SetAttrWithConstant
+  location:
+    row: 36
+    column: 0
+  end_location:
+    row: 36
+    column: 29
+  fix: ~