From b8674e42d217b1b7ed6d7a1d89dc42a59902b108 Mon Sep 17 00:00:00 2001
From: aspect <aspect+tclcore@abstracted-spleen.org>
Date: Thu, 19 Feb 2015 02:42:13 +0000
Subject: handle [lreplace l x y ...] where y<x

---
 generic/tclCompCmdsGR.c | 7 ++++---
 tests/lreplace.test     | 3 +++
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/generic/tclCompCmdsGR.c b/generic/tclCompCmdsGR.c
index 5220576..e7f6473 100644
--- a/generic/tclCompCmdsGR.c
+++ b/generic/tclCompCmdsGR.c
@@ -1501,6 +1501,10 @@ TclCompileLreplaceCmd(
 	return TCL_ERROR;
     }
 
+    if(idx2 != INDEX_END && idx2 < idx1) {
+	idx2 = idx1-1;
+    }
+
     /*
      * Work out what this [lreplace] is actually doing.
      */
@@ -1524,9 +1528,6 @@ TclCompileLreplaceCmd(
 		tmpObj = Tcl_NewIntObj(idx1);
 		Tcl_IncrRefCount(tmpObj);
 	    }
-	    if(idx2 < idx1) {
-		idx2 = idx1-1;
-	    }
 	    goto dropRange;
 	}
     }
diff --git a/tests/lreplace.test b/tests/lreplace.test
index 44f3ac2..d5c51ae 100644
--- a/tests/lreplace.test
+++ b/tests/lreplace.test
@@ -143,6 +143,9 @@ test lreplace-4.3 {lreplace edge case} {
 test lreplace-4.4 {lreplace edge case} {
     lreplace {1 2 3 4 5} 3 1
 } {1 2 3 4 5}
+test lreplace-4.4 {lreplace edge case} {
+    lreplace {1 2 3 4 5} 3 0 _
+} {1 2 3 _ 4 5}
 
 # cleanup
 catch {unset foo}
-- 
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