From dc59e50561eeaedbc6f7a50d8703d627be2c6847 Mon Sep 17 00:00:00 2001
From: Juergen Hoeller <jhoeller@pivotal.io>
Date: Wed, 30 Oct 2019 01:04:26 +0100
Subject: [PATCH] Avoid unnecessary use of ResolvableType within
 MethodParameter

Closes gh-23792
---
 .../main/java/org/springframework/core/MethodParameter.java   | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/spring-core/src/main/java/org/springframework/core/MethodParameter.java b/spring-core/src/main/java/org/springframework/core/MethodParameter.java
index 6c1e1068d0..f012500224 100644
--- a/spring-core/src/main/java/org/springframework/core/MethodParameter.java
+++ b/spring-core/src/main/java/org/springframework/core/MethodParameter.java
@@ -486,7 +486,9 @@ public class MethodParameter {
 		if (paramType != null) {
 			return paramType;
 		}
-		paramType = ResolvableType.forMethodParameter(this, null, 1).resolve();
+		if (getContainingClass() != getDeclaringClass()) {
+			paramType = ResolvableType.forMethodParameter(this, null, 1).resolve();
+		}
 		if (paramType == null) {
 			paramType = computeParameterType();
 		}
-- 
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