Fix symbol table sub_table desync for non-simple annotation targets

Non-simple annotations (subscript/attribute/parenthesized targets like
`a[0]: expr`) were scanned in the annotation scope during symbol table
analysis, creating sub_tables for any comprehensions. But codegen only
compiles simple name annotations into __annotate__, so those sub_tables
were never consumed. This caused subsequent simple annotations'
comprehension sub_tables to get the wrong index, resulting in
"the symbol 'X' must be present in the symbol table" errors.

Fix: skip entering annotation scope for non-simple annotations since
they are never compiled into __annotate__.

Author: youknowone

Lib/test/test_type_annotations.py

@@ -776,7 +776,6 @@ def test_non_name_annotations(self):
 
 class RegressionTests(unittest.TestCase):
     # gh-132479
-    @unittest.expectedFailure  # TODO: RUSTPYTHON; SyntaxError: the symbol 'unique_name_6' must be present in the symbol table
     def test_complex_comprehension_inlining(self):
         # Test that the various repro cases from the issue don't crash
         cases = [

crates/codegen/src/symboltable.rs

@@ -1462,7 +1462,15 @@ impl SymbolTableBuilder {
                         self.scan_expression(target, ExpressionContext::Store)?;
                     }
                 }
-                self.scan_annotation(annotation)?;
+                // Only scan annotation in annotation scope for simple name targets.
+                // Non-simple annotations (subscript, attribute, parenthesized) are
+                // never compiled into __annotate__, so scanning them would create
+                // sub_tables that desynchronize the annotation scope's sub_table index.
+                let is_simple_name =
+                    *simple && matches!(&**target, Expr::Name(_));
+                if is_simple_name {
+                    self.scan_annotation(annotation)?;
+                }
                 if let Some(value) = value {
                     self.scan_expression(value, ExpressionContext::Load)?;
                 }