Patch 1.24 return bug false positive fixer
Retail patch 1.24 brought a lot of doom and destruction to the world of Jass, thanks to some new blizzard bugs, certain functions with more than one return statement would silent cause syntax errors or crash the game, effectively making innocent maps unplayable, even if they do not use the now infamous &aquot;Return bug exploiters&aquot;. This was the reason, that I had to add a quick fix to jasshelper, this compiler mod will replace all your functions with multiple return values into two separate functions that will be safe from the false positive.
Side effects and limitations
This fixer is only meant as a temporary measure while blizzard fixes this terrible bug or while you make your functions safe from having multiple return statements, whatever happens first. The technique is a little dumb, for each function that is suspect, it will create a new dummy one that returns nothing, and just assigns a global before returning, then the old function will actually call this dummy function. In short words, this means that this fixer will make calling certain functions (specifically those that have a return value and more than 1 return statements) slightly slower by adding an extra function call.
This method does not work correctly with recursive functions (as it is still not possible to call a function from above its declaration). It is likely that if a function is recursive and has multiple return statements, it will cause a compiler error. In this case, it is better to modify the function, as it is most likely also a return bug false positive (so it probably causes your map to be unplayable in patch 1.24). To prevent this, jasshelper will try to detect the recursion, and if possible, take care of it. But there are some recursion patterns that jasshelper cannot fix at this moment.
Enabling the return fixer
This feature must be manually enabled, so if you for some reason need to make your map work specifically with patch 1.24, or if maybe you think that some return bug false positive is still affecting your map, you can enable the feature. In order to enable the return fixer, take jasshelper.conf and replace [noreturnfixer] with [doreturnfixer] if there is no tag [noreturnfixer] in jasshelper.conf, then simply add the [doreturnfixer] tag to it.