# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1589146203 -7200
# Node ID fad124c0e34906c4b03216a80f54e0cf0e49dfc7
# Parent  a30777aed380973aed72945bb9f148e9358fb705
patch 8.2.0735: Vim9: using unitialized memory

Commit: https://github.com/vim/vim/commit/bc38f25c021dc4314c77d50a608329a328b0d988
Author: Bram Moolenaar <Bram@vim.org>
Date:   Sun May 10 23:20:06 2020 +0200

    patch 8.2.0735: Vim9: using unitialized memory

    Problem:    Vim9: using unitialized memory.
    Solution:   Clear the arg_lvar field.

diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    735,
+/**/
     734,
 /**/
     733,
diff --git a/src/vim9compile.c b/src/vim9compile.c
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -4762,18 +4762,20 @@ compile_assignment(char_u *arg, exarg_T 
 		}
 
 	    lvar = lookup_local(arg, varlen, cctx);
-	    if (lvar == NULL
-		    && lookup_arg(arg, varlen,
+	    if (lvar == NULL)
+	    {
+		CLEAR_FIELD(arg_lvar);
+		if (lookup_arg(arg, varlen,
 			    &arg_lvar.lv_idx, &arg_lvar.lv_type,
 			    &arg_lvar.lv_from_outer, cctx) == OK)
-	    {
-		if (is_decl)
 		{
-		    semsg(_(e_used_as_arg), name);
-		    goto theend;
+		    if (is_decl)
+		    {
+			semsg(_(e_used_as_arg), name);
+			goto theend;
+		    }
+		    lvar = &arg_lvar;
 		}
-		arg_lvar.lv_const = 0;
-		lvar = &arg_lvar;
 	    }
 	    if (lvar != NULL)
 	    {