Stack overflow - last zone 4 encounter

[Doronimmo]

Stack overflow after accepting delivery quest

[Doronimmo]

After restart, issue continues

[evanbowman]

After restart, issue continues

Can I have the save file? This could be really helpful to have if the issue is easily reproducible upon restart.

[Doronimmo]

Skyland.srm.txt
Savefile (srm and sav are basically the same)

[evanbowman]

Did you start a new game afterwards? Are you using an overdrive? This version of the save file is not saved at a state right before the crash happens.

[evanbowman]

Sometimes with an everdrive, some models will write files back to the sd card upon the next time that the game is loaded, could this be an older version of the save file?

[evanbowman]

Unfortunately, this issue is possibly my recursive merge-sort function

skyland-beta/scripts/stdlib.lisp

Line 116 in 21ff1dd

(defn/c sort (lat comp)

I'll rewrite it to use the C++ sort function. My lisp sort function was so concise and pretty, RIP

[Doronimmo]

Sometimes with an everdrive, some models will write files back to the sd card upon the next time that the game is loaded, could this be an older version of the save file?

might be the case, this looks like the same game, but 1 zone before.

[Doronimmo]

Unfortunately, this issue is possibly my recursive merge-sort function

skyland-beta/scripts/stdlib.lisp

Line 116 in 21ff1dd

(defn/c sort (lat comp)

I'll rewrite it to use the C++ sort function. My lisp sort function was so concise and pretty, RIP

is this the lisp api backend?

[evanbowman]

Unfortunately, this issue is possibly my recursive merge-sort function

skyland-beta/scripts/stdlib.lisp

Line 116 in 21ff1dd

(defn/c sort (lat comp)

I'll rewrite it to use the C++ sort function. My lisp sort function was so concise and pretty, RIP

is this the lisp api backend?

Some of the lisp api is written in lisp. I'll have to replace this function with C++ code, because it's using too much stack space.

[evanbowman]

a13acf0

[evanbowman]

#118
These two issues could be the same underlying problem

[Doronimmo]

#118 These two issues could be the same underlying problem

So this is when the stack overflow is not detected?

[evanbowman]

#118 These two issues could be the same underlying problem

So this is when the stack overflow is not detected?

Possibly, yeah. I do my best to detect stack overflows, but it's imprecise and quite difficult. There's no operating system on the gba and I have to do some manual checks to see if sentinel values placed at the end of the stack get trampled upon. Certain patterns of writes can skip over the memory locations that I use to detect invalid stack writes, preventing the stack overflow detection logic from working. Due to lack of hardware memory protection support in the gameboy, this is the best I can do.