8312814: Compiler crash when template processor type is a captured wildcard

Reviewed-by: jlahoda, mcimadamore, vromero

Author: Jim Laskey

src/jdk.compiler/share/classes/com/sun/tools/javac/comp/TransTypes.java

@@ -838,6 +838,7 @@ else if (tree.sym.kind == VAR) {
     }
 
     public void visitStringTemplate(JCStringTemplate tree) {
+        tree.processor = translate(tree.processor, erasure(tree.processor.type));
         tree.expressions = tree.expressions.stream()
                 .map(e -> translate(e, erasure(e.type))).collect(List.collector());
         tree.type = erasure(tree.type);

test/langtools/tools/javac/template/T8312814.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test T8312814
+ * @summary Verify proper behavior of TransType w.r.t. templated Strings
+ * @enablePreview
+ * @compile T8312814.java
+ */
+
+
+import java.util.List;
+
+public class T8312814 {
+    void x(List<? extends StringTemplate.Processor<String, RuntimeException>> list) {
+        list.get(0)."";
+    }
+}
+