From cf3a6da3ce643e1d602ecac57c69c0d69a8bb481 Mon Sep 17 00:00:00 2001
From: Dzmitry Malyshau <kvarkus@gmail.com>
Date: Wed, 31 Mar 2021 23:18:33 -0400
Subject: [PATCH] [msl] clean up emitted expressions at the end of a block

---
 src/back/msl/writer.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/back/msl/writer.rs b/src/back/msl/writer.rs
index a82c456613..f748b5a7b0 100644
--- a/src/back/msl/writer.rs
+++ b/src/back/msl/writer.rs
@@ -969,6 +969,16 @@ impl<W: Write> Writer<W> {
                 }
             }
         }
+
+        // un-emit expressions
+        //TODO: take care of loop/continuing?
+        for statement in statements {
+            if let crate::Statement::Emit(ref range) = *statement {
+                for handle in range.clone() {
+                    self.named_expressions.remove(handle.index());
+                }
+            }
+        }
         Ok(())
     }