diff --git a/src/testdir/test_tuple.vim b/src/testdir/test_tuple.vim
index e767851..45f730d 100644
--- a/src/testdir/test_tuple.vim
+++ b/src/testdir/test_tuple.vim
@@ -1586,6 +1586,17 @@
         \ 'E121: Undefined variable: pat'])
 endfunc
 
+" The following used to crash Vim
+func Test_import_invalid_tuple()
+  let lines =<< trim END
+    imp(",G0}11*f[+\x","#|
+  END
+  new
+  call setline(1, lines)
+  call assert_fails('source', 'E114: Missing double quote: "#|')
+  bw!
+endfunc
+
 " Test for add() with a tuple
 func Test_tuple_add()
   let lines =<< trim END
diff --git a/src/tuple.c b/src/tuple.c
index eff4bdc..9ca1f34 100644
--- a/src/tuple.c
+++ b/src/tuple.c
@@ -518,6 +518,9 @@
 	    // Add the first item to the tuple from "rettv"
 	    if (tuple_append_tv(tuple, rettv) == FAIL)
 		return FAIL;
+	    // The first item in "rettv" is added to the tuple.  Set the rettv
+	    // type to unknown, so that the caller doesn't free it.
+	    rettv->v_type = VAR_UNKNOWN;
 	}
     }
 
diff --git a/src/version.c b/src/version.c
index c45c65e..b9af08a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -710,6 +710,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1406,
+/**/
     1405,
 /**/
     1404,