From 1dbc0cdd15e3c0d96e676ed686e8f02163a0bf20 Mon Sep 17 00:00:00 2001
From: Jeff Bezanson <jeff.bezanson@gmail.com>
Date: Tue, 26 Apr 2016 16:06:30 -0400
Subject: [PATCH] avoid allocating Boxes for variables assigned once in the
 first basic block

helps the easier cases of #15276
---
 src/julia-syntax.scm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/julia-syntax.scm b/src/julia-syntax.scm
index 0e79308edd805..6f76f02a4a261 100644
--- a/src/julia-syntax.scm
+++ b/src/julia-syntax.scm
@@ -2716,6 +2716,8 @@ f(x) = yt(x)
                             (error (string "cannot add method to function argument " name)))
                         (if (eqv? (string.char (string name) 0) #\@)
                             (error "macro definition not allowed inside a local scope"))))
+             (if lam2
+                 (lambda-optimize-vars! lam2))
              (if (not local?) ;; not a local function; will not be closure converted to a new type
                  (cond (short e)
                        ((null? cvs)