32 bit Exports crash on startup in Godot 3.6.0

[Daniel-da-Silva]

Tested versions

Reproducable in Godot 3.6.0. Not in any other version.

System information

Windows 10 - i7-4790 - RX570 (Driver 23.5.2) - GLES3

Issue description

Ayayay, I recently updated my game Fight in the Arena from 3.5.3 to 3.6.0 and after I exported my project (32 bit) on Windows it crashed. Not always but very often (more than 50% of the time). When I switched to 64 bit export it worked fine. I thought maybe this is game specific but then I thought: The game is so simple (text-adventure with minimal graphics) it likely is something Engine related. My almost empty testproject yielded the same result. Never happened in any other version.

I have an old driver since I got visual glitches in another game of mine with newer ones (this was fixed in 4.3) but since it was never a problem in any other Engine version I don't think it's driver related. Still if not reproducable I can look into it.

Steps to reproduce

Export a 32 bit project on Windows and try to start it. Closes after half a second or so.

Minimal reproduction project (MRP)

N/A

[Daniel-da-Silva]

Hey! To make sure it is not driver related I just tested it on the computer of my fiancee which has a nvidia gpu. Still the same startup crash most of the time with 32 bit Windows export.

[lawnjelly]

I don't have a windows machine but I've just tested some exports on wine, and while debug 32 bit seems to be working, release 32 bit export does indeed seem to crash. 64 bit release seems fine.

Linux 32 bit release doesn't seem to crash (on my 64 bit Linux Mint). Could be something windows specific rather than just the 32 bit. I was suspecting something assuming a 64 bit pointer size, but that seems less likely if Linux 32 bit works, unless it is something platform specific.

May need someone with windows to debug.

If it doesn't get debugged soon, I have long intended to try and install windows on an old 32 bit laptop, so may be able to take a look but it likely won't be until at least next week.

[akien-mga]

A potential culprit can be the toolchains version we used for 3.6. I updated to a newer mingw/GCC in January 2024: godotengine/build-containers#135

Comparing release dates, this might have been first used for 3.6-beta4. It would be useful to test various beta snapshots to pinpoint the first which crashes (which if my assumption is correct might be beta4).

[lawnjelly]

I'll try this, as although I can't debug I can at least replicate the crash in WINE.

beta 3 seems to work fine, will test beta 4 now to see whether this was the breaking change.
UPDATE:
Yes, can confirm beta 4 is the first version that the 32 bit release crashes are occurring on for me.

[akien-mga]

I'll look into it, it's not the first time toolchains updates makes Windows 32-bit crash I think, we might have had this issue with 4.x in the past.