From e6ac69bdca16b5c5f03476e682fbffa9af6eb0c5 Mon Sep 17 00:00:00 2001
From: Ary Borenszweig <asterite@gmail.com>
Date: Thu, 26 Jul 2018 20:50:30 -0300
Subject: [PATCH] Compiler: missing `request_value` in `not` call

---
 spec/compiler/codegen/not_spec.cr       | 12 ++++++++++++
 src/compiler/crystal/codegen/codegen.cr |  4 +++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/spec/compiler/codegen/not_spec.cr b/spec/compiler/codegen/not_spec.cr
index 3dda494fcf1f..99a0520ed639 100644
--- a/spec/compiler/codegen/not_spec.cr
+++ b/spec/compiler/codegen/not_spec.cr
@@ -55,4 +55,16 @@ describe "Code gen: not" do
       !a.is_a?(String) && !a
       )).to_b.should be_false
   end
+
+  it "codegens not with inlinable value (#6451)" do
+    codegen(%(
+      class Test
+        def test
+          false
+        end
+      end
+
+      !Test.new.test
+      nil))
+  end
 end
diff --git a/src/compiler/crystal/codegen/codegen.cr b/src/compiler/crystal/codegen/codegen.cr
index 236b525b48c4..c2f98a3d51ba 100644
--- a/src/compiler/crystal/codegen/codegen.cr
+++ b/src/compiler/crystal/codegen/codegen.cr
@@ -815,7 +815,9 @@ module Crystal
     end
 
     def visit(node : Not)
-      accept node.exp
+      request_value do
+        accept node.exp
+      end
       @last = codegen_cond node.exp.type.remove_indirection
       @last = not @last
       false