patch 9.1.1401: list not materialized in prop_list()

Problem:  list not materialized in prop_list()
          (Nickwiz)
Solution: materialize list before accessing it

fixes: #17298
closes: #17349

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_textprop.vim b/src/testdir/test_textprop.vim
index d26efa9..bcf83ca 100644
--- a/src/testdir/test_textprop.vim
+++ b/src/testdir/test_textprop.vim
@@ -4757,4 +4757,29 @@
   call StopVimInTerminal(buf)
 endfunc
 
+func Test_textprop_materialize_list()
+	let ids = range(3)
+	call assert_equal([], prop_list(1, #{ids: ids}))
+
+	let ids = range(3) + []
+	call assert_equal([], prop_list(1, #{ids: ids}))
+
+	let ids = range(3)
+	let ids[0] = ids[0]
+	call assert_equal([], prop_list(1, #{ids: ids}))
+
+	let ids = range(3)
+	call assert_equal([], prop_list(1, #{ids: ids}))
+
+	call assert_equal([], prop_list(1, #{ids: range(3) + [] }))
+
+	let ids = range(3)
+	call assert_equal([], prop_list(1, #{ids: ids}))
+
+	let ids = range(0, 3)
+	call assert_equal([], prop_list(1, #{ids: ids}))
+
+	call assert_equal([], prop_list(1, #{ids: 3->range()}))
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab