From ad5ac78e068875d96a6be935b5d280f59b81857d Mon Sep 17 00:00:00 2001
From: modmuss50 <modmuss50@gmail.com>
Date: Tue, 13 Jul 2021 00:05:24 +0100
Subject: [PATCH] Improve some bad stack traces.

Idk why this happens.
---
 src/main/java/net/fabricmc/loom/task/LoomTasks.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/java/net/fabricmc/loom/task/LoomTasks.java b/src/main/java/net/fabricmc/loom/task/LoomTasks.java
index 2ac3aad..59a596e 100644
--- a/src/main/java/net/fabricmc/loom/task/LoomTasks.java
+++ b/src/main/java/net/fabricmc/loom/task/LoomTasks.java
@@ -114,6 +114,13 @@ public final class LoomTasks {
 
 		project.afterEvaluate(p -> {
 			MappingsProviderImpl mappingsProvider = extension.getMappingsProvider();
+			if (mappingsProvider.mappedProvider == null) {
+				// If this is ever null something has gone badly wrong,
+				// for some reason for another this afterEvaluate still gets called when something has gone badly
+				// wrong, returning here seems to produce nicer errors.
+				return;
+			}
+
 			File inputJar = mappingsProvider.mappedProvider.getMappedJar();
 
 			if (mappingsProvider.hasUnpickDefinitions()) {