bpo-42737: annotations with complex targets no longer causes any runtime effects (GH-23952)
diff --git a/Python/compile.c b/Python/compile.c
index 1b7a2e8..2cf2f4a 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -5356,6 +5356,12 @@ check_ann_expr(struct compiler *c, expr_ty e)
static int
check_annotation(struct compiler *c, stmt_ty s)
{
+ /* Annotations of complex targets does not produce anything
+ under annotations future */
+ if (c->c_future->ff_features & CO_FUTURE_ANNOTATIONS) {
+ return 1;
+ }
+
/* Annotations are only evaluated in a module or class. */
if (c->u->u_scope_type == COMPILER_SCOPE_MODULE ||
c->u->u_scope_type == COMPILER_SCOPE_CLASS) {