From 36520da049b8bb88ef0d05eabaa066d425c0b705 Mon Sep 17 00:00:00 2001
From: "Benedicto Franco Jr." <bene@trendvidia.com>
Date: Mon, 2 Nov 2026 23:39:31 -0800
Subject: [PATCH] check-decode-android: exit 2 on a missing --schema

Map.of refuses a null key, so the lookup threw, and the uncaught NPE
exited 1, the harness's reject code (#177).
---
 .../java/org/protowire/check/android/CheckDecodeAndroid.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/check-decode-android/src/main/java/org/protowire/check/android/CheckDecodeAndroid.java b/check-decode-android/src/main/java/org/protowire/check/android/CheckDecodeAndroid.java
index c0bc5cf..4c4cf43 100644
--- a/check-decode-android/src/main/java/org/protowire/check/android/CheckDecodeAndroid.java
+++ b/check-decode-android/src/main/java/org/protowire/check/android/CheckDecodeAndroid.java
@@ -63,7 +63,8 @@ public static void main(String[] args) {
                 }
             }
         }
-        PxfMeta meta = METAS.get(schema);
+        // Map.of refuses a null key, and the NPE would exit 1, the reject code.
+        PxfMeta meta = schema == null ? null : METAS.get(schema);
         if (format == null || input == null || meta == null) {
             System.err.println("check-decode-android: need --format, --input and a known --schema, got " + schema);
             System.exit(2);