Try loadClass on LinkageError in case of ClassLoader mismatch

See gh-34677

spring-core/src/main/java/org/springframework/cglib/core/ReflectUtils.java

@@ -527,6 +527,16 @@ public class ReflectUtils {
 				c = lookup.defineClass(b);
 			}
 			catch (LinkageError | IllegalAccessException ex) {
+				if (ex instanceof LinkageError) {
+					// Could be a ClassLoader mismatch with the class pre-existing in a
+					// parent ClassLoader -> try loadClass before giving up completely.
+					try {
+						c = contextClass.getClassLoader().loadClass(className);
+					}
+					catch (ClassNotFoundException cnfe) {
+					}
+				}
+				if (c == null) {
 					throw new CodeGenerationException(ex) {
 						@Override
 						public String getMessage() {
@@ -537,6 +547,7 @@ public class ReflectUtils {
 						}
 					};
 				}
+			}
 			catch (Throwable ex) {
 				throw new CodeGenerationException(ex);
 			}