util.stanza + tests: Bail out of loop if we are iterating too far, fixes #981

1 files changed, 7 insertions, 0 deletions

diff --git a/spec/util_stanza_spec.lua b/spec/util_stanza_spec.lua
index aabeeadc..383beae3 100644
--- a/spec/util_stanza_spec.lua
+++ b/spec/util_stanza_spec.lua
@@ -327,5 +327,12 @@ describe("util.stanza", function()
 			end);
 			assert.equal(3, #s.tags);
 		end);
+		it("errors on invalid data - #981", function ()
+			local s = st.message({}, "Hello");
+			s.tags[1] = st.clone(s.tags[1]);
+			assert.has_error_match(function ()
+				s:maptags(function () end);
+			end, "Invalid stanza");
+		end);
 	end);
 end);