From 54daed1dc8b9f05bb941238319d59e6b806ad418 Mon Sep 17 00:00:00 2001
From: Andrea Cavalli <andrea@cavallium.it>
Date: Wed, 22 Jun 2022 12:11:06 +0200
Subject: [PATCH] Update data builder

---
 .../java/it/cavallium/data/generator/SourcesGenerator.java     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/java/it/cavallium/data/generator/SourcesGenerator.java b/src/main/java/it/cavallium/data/generator/SourcesGenerator.java
index 7632169..ce30326 100644
--- a/src/main/java/it/cavallium/data/generator/SourcesGenerator.java
+++ b/src/main/java/it/cavallium/data/generator/SourcesGenerator.java
@@ -1478,6 +1478,9 @@ public class SourcesGenerator {
 										String toTypeName = nextVersionFieldTypes.get(key);
 										Family toFamily = typeFamily.get(toTypeName);
 										TypeName toType = nextVersionTypeTypes.get(toTypeName);
+										Objects.requireNonNull(toType,
+												"Type " + toTypeName + " is unknown in version " + nextVersion.orElse(null)
+										);
 										TypeName toTypeBoxed = toType.isPrimitive() ? toType.box() : toType;
 										{
 											currentVarNumber.addTo(key, 1);