"Out of memory" instead of "Undefined user function" the second time

[Marcos Cruz]

After some investigation, I can confirm something strange happens with functions. It seems it's not related only to integer functions or recursion, as it seemed at first. Look:

print fnz$(0)
Undefined user function
Ok 
print fnz$(0)
Out of memory
Ok 

The print commands were typed right after the boot of PC-BASIC 15.08.11. I typed the same code in the original GW-BASIC 3.23, and the second error is "Undefined user function" as expected.

What do you think?

[Rob Hagemans]

Hi Marcos, thanks for working this out! I think I know what's going on - PC-BASIC keeps track of what FN functions are being evaluated to be able to cut recursive calls short; it looks like that flag fails to get cleared if the function doesn't actually exist. That would be easy to fix - I'll check if this is the case.

Rob

[Rob Hagemans]

Bug tracker here https://github.com/robhagemans/pcbasic/issues/19