[notabug] GetAchievementTimestamp(number achievementId) returns wrong datatype

[MrPikPik]

Hello everyone,

I noticed the function "GetAchievementTimestamp(number achievementId)" returns "wrong" values.
For my understanding the function expects a number, the id of an achievement, and should return a unix timestamp of the completion date of the given achievement or 0 if it hasn't been completed.


Calling the function for completed achievements however, the return value is a floating point number.

I did some investigation with the number the function returned: In my example, the returned number was "7.8484867882774e-315". The 64 bits of that double are "0000000000000000000000000000000001011110101011110101111011110011". When you interpret these bits as an unsigned long you get the value "1588551411", which is the actual unix timestamp of completion of the achievement I fed into the function, May 4th 2020.

Seems like the lua backend just interprets the memory as the wrong data type so the issue should be easily fixable trough some pointer-casting-magic

Unfortunatly I am unable to tell if this is a recent bug or if it has been in the game for longer.

I hope this is helpful for the devs