tests: print stack traces from check_answer callback function

diff --git a/tests/config/test_utils.lua b/tests/config/test_utils.lua
index 53b6c09c891760d9c5ec154b2506d4db1371fdc6..15a14520f3704dd1ad1f1a4daa355fe5b6b544c4 100644 (file)
--- a/tests/config/test_utils.lua
+++ b/tests/config/test_utils.lua
@@ -81,8 +81,17 @@ function M.check_answer(desc, qname, qtype, expected_rcode, expected_rdata)
                        end
                end
                done = true
-       end
-       resolve(qname, qtype, kres.class.IN, {}, callback)
+               end
+       resolve(qname, qtype, kres.class.IN, {},
+               function(...)
+                       local ok, err = xpcall(callback, debug.traceback, ...)
+                       if not ok then
+                               fail('error in check_answer callback function')
+                               io.stderr:write(string.format('%s\n', err))
+                               os.exit(2)
+                       end
+               end
+       )
 
        for delay = 0.1, 4, 0.5 do -- total max 14.9s in 8 steps
                if done then return end