From 939772ee9603277a8eb8d03dc69c13926bf027b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johannes=20M=C3=BCller?= <straightshoota@gmail.com>
Date: Wed, 4 Jan 2023 21:27:10 +0100
Subject: [PATCH] Fix: Unwrap nested errors in error handler for
 `Crystal::Error` (#12888)

---
 src/compiler/crystal/command.cr | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/compiler/crystal/command.cr b/src/compiler/crystal/command.cr
index 7f9ea58148be..ca66b460d83b 100644
--- a/src/compiler/crystal/command.cr
+++ b/src/compiler/crystal/command.cr
@@ -141,6 +141,14 @@ class Crystal::Command
   rescue ex : Crystal::Error
     report_warnings
 
+    # This unwraps nested errors which could be caused by `require` which wraps
+    # errors in order to trace the require path. The causes are listed similarly
+    # to `#inspect_with_backtrace` but without the backtrace.
+    while cause = ex.cause
+      error ex.message, exit_code: nil
+      ex = cause
+    end
+
     error ex.message
   rescue ex : OptionParser::Exception
     error ex.message