From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 10 May 2020 21:20:06 +0000 (+0200)
Subject: patch 8.2.0735: Vim9: using unitialized memory
X-Git-Tag: v8.2.0735
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=bc38f25c021dc4314c77d50a608329a328b0d988;p=vim

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
index 19920dea8..96ca8898a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    735,
 /**/
     734,
 /**/
diff --git a/src/vim9compile.c b/src/vim9compile.c
index c8c87e737..99246e07d 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -4762,18 +4762,20 @@ compile_assignment(char_u *arg, exarg_T *eap, cmdidx_T cmdidx, cctx_T *cctx)
 		}
 
 	    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)
 	    {