From 2c718dadc6bed8061c9e67d5d82f229e78ae4647 Mon Sep 17 00:00:00 2001
From: cpovirk <cpovirk@google.com>
Date: Wed, 1 Jul 2026 13:07:30 -0700
Subject: [PATCH] Introduce minimal Refaster support for [unnamed
 variables](https://openjdk.org/jeps/456).

There is probably more to be worked out here, even to decide upon the full set of desired behaviors. But it's nice to at least not crash.

PiperOrigin-RevId: 941255538
---
 .../java/com/google/errorprone/refaster/UVariableDecl.java     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/src/main/java/com/google/errorprone/refaster/UVariableDecl.java b/core/src/main/java/com/google/errorprone/refaster/UVariableDecl.java
index d57828aa610..4357fc62f32 100644
--- a/core/src/main/java/com/google/errorprone/refaster/UVariableDecl.java
+++ b/core/src/main/java/com/google/errorprone/refaster/UVariableDecl.java
@@ -131,6 +131,9 @@ private JCVariableDecl inline(@Nullable UExpression type, Inliner inliner)
       modifiers = maker.Modifiers(0L);
       name = getName().inline(inliner);
     }
+    if (name.isEmpty()) {
+      name = inliner.asName("_");
+    }
     return maker.VarDef(
         modifiers,
         name,