diff --git a/src/testdir/test_vim9_assign.vim b/src/testdir/test_vim9_assign.vim
index 1075e17..60c8fe9 100644
--- a/src/testdir/test_vim9_assign.vim
+++ b/src/testdir/test_vim9_assign.vim
@@ -326,6 +326,18 @@
   END
   CheckDefFailure(lines, 'E1012: Type mismatch; expected number but got dict<unknown>', 3)
 
+  lines =<< trim END
+    var lines: list<string>
+    lines['a'] = 'asdf'
+  END
+  CheckDefFailure(lines, 'E39:', 2)
+
+  lines =<< trim END
+    var lines: string
+    lines[9] = 'asdf'
+  END
+  CheckDefFailure(lines, 'E1141:', 2)
+
   # list of dict
   var ld: list<dict<number>>
   ld[0] = {}
diff --git a/src/version.c b/src/version.c
index 2d39c1b..f6c51e1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2139,
+/**/
     2138,
 /**/
     2137,
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 6cbf784..3fae25e 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -5856,8 +5856,6 @@
 	    int r;
 
 	    // Compile the "idx" in "var[idx]" or "key" in "var.key".
-	    if (new_local)
-		--cctx->ctx_locals.ga_len;
 	    p = var_start + varlen;
 	    if (*p == '[')
 	    {
@@ -5877,8 +5875,6 @@
 
 		r = generate_PUSHS(cctx, key);
 	    }
-	    if (new_local)
-		++cctx->ctx_locals.ga_len;
 	    if (r == FAIL)
 		goto theend;