From cb1fac88380abef7345ef0ed2e7515e74d0d2dec Mon Sep 17 00:00:00 2001
From: Liam Miller-Cushon <cushon@google.com>
Date: Tue, 2 Aug 2022 09:03:29 -0700
Subject: [PATCH] Fix a crash on a test-only redefinition of ThreadPoolExecutor
 that doesn't have any parameters

PiperOrigin-RevId: 464805116
---
 .../bugpatterns/ErroneousThreadPoolConstructorChecker.java     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/ErroneousThreadPoolConstructorChecker.java b/core/src/main/java/com/google/errorprone/bugpatterns/ErroneousThreadPoolConstructorChecker.java
index 4e3877392fd..e32128738da 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/ErroneousThreadPoolConstructorChecker.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/ErroneousThreadPoolConstructorChecker.java
@@ -64,6 +64,9 @@ public Description matchNewClass(NewClassTree tree, VisitorState state) {
       return Description.NO_MATCH;
     }
     List<? extends ExpressionTree> arguments = tree.getArguments();
+    if (arguments.size() < 2) {
+      return Description.NO_MATCH;
+    }
     Integer corePoolSize = ASTHelpers.constValue(arguments.get(0), Integer.class);
     Integer maximumPoolSize = ASTHelpers.constValue(arguments.get(1), Integer.class);
     if (corePoolSize == null || maximumPoolSize == null || corePoolSize.equals(maximumPoolSize)) {