Hi, Sergey! Thanks for the patch! LGTM, except for a single nit below: > >When `tonumber()` is recorded (as a part of a trace) for cdata argument >can't be converted to number the `nil` value is recorded as the yielded >result. But without special check on trace for cdata type this nil will >be returned for another type of cdata that can be converted. The first sentence lacks commas and is completely unreadable. I suggest the following fix: | When `tonumber()` is recorded (as a part of a trace) for a cdata argument that can't be converted to number, the `nil` value is | recorded as the yielded result. > >This patch adds the corresponding check for recoding of failed cdata >conversions. Typo: s/recoding/recording   -- Best regards, Maxim Kokryashkin