Issue 27392. Fix for invoking objects with function-bounds type parameter types.

pkg/analyzer/lib/src/generated/element_resolver.dart

Index: pkg/analyzer/lib/src/generated/element_resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/element_resolver.dart b/pkg/analyzer/lib/src/generated/element_resolver.dart
index 075a89dece0413d1ad8646cb95f1aef4c9dfaadc..3d9f729186d64a7b1823180f4bfe1172aee0b551 100644
--- a/pkg/analyzer/lib/src/generated/element_resolver.dart
+++ b/pkg/analyzer/lib/src/generated/element_resolver.dart
@@ -1619,6 +1619,7 @@ class ElementResolver extends SimpleAstVisitor<Object> {
    * invoked using the call operator '()'.
    */
   bool _isExecutableType(DartType type) {
+    type = type?.resolveToBound(_resolver.typeProvider.objectType);
     if (type.isDynamic || type is FunctionType) {
       return true;
     } else if (!_enableStrictCallChecks &&