From f3d36a6627e4d4e869f421c70176b8092dba9bed Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Johannes=20M=C3=BCller?= <straightshoota@gmail.com>
Date: Tue, 10 Nov 2020 18:22:02 +0100
Subject: [PATCH] Fix Command#report_warnings to gracefully handle missing
 Compiler#program (#9866)

---
 src/compiler/crystal/semantic/warnings.cr | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/compiler/crystal/semantic/warnings.cr b/src/compiler/crystal/semantic/warnings.cr
index 48fa1b504ef8..5516c605bb45 100644
--- a/src/compiler/crystal/semantic/warnings.cr
+++ b/src/compiler/crystal/semantic/warnings.cr
@@ -169,7 +169,8 @@ module Crystal
       compiler = @compiler
       return unless compiler
 
-      program = compiler.program
+      program = compiler.program?
+      return unless program
       return if program.warning_failures.empty?
 
       program.warning_failures.each do |message|