How to analyze / debug compiler crashes?

[SirTwist]

FPC 3.3.1 (maybe even 3.2.3) had some fixes around ppu loading. But you then need to adapt any code that doesn't compile.
3.2.3 would be preferable as it likely is more stable.

Yes, I upgraded to 3.3.1, but some external components wouldn't compile (BGRA, EyeCandy Controls, ...)
I downgraded to 3.2.3 and the crashes still ocure.

Have you tried to really remove **all** ppu from all folders/packages before the build?

Yes, before posting initially.

In general such errors have in part been known to be caused by circular unit references (uses in implementation). You may want to try to get rid of them if you can. (I know, easier said ...)

That might be a problem, or THE problem. My units are heavily cross linked. I try to clean this up as far as I get. Thank you!

Okay, Update: I tried to remove the dependencies (in the implementation part) and the crash now ocures on other files. I count that as progress...

Code: [Select]

¨BÆiø'mUUlcDmxUniverses.pas(361,53899) Error: Duplicate identifier "UlcPrjObjEditors"
¨BÆiø'mUUlcDmxUniverses.pas(361,53899) Hint: Identifier already defined in UlcDmxUniverses.pas at line 9
¨BÆiø'mUUlcDmxUniverses.pas(361,53899) Error: Compilation raised exception internally


[ALLIGATOR]

How to analyze / debug compiler crashes?

It may also be helpful to try to reduce the project to a minimal reproducible example.
Or, at the very least, to a state where it can be made publicly available, if it’s a closed-source project.
Or, if it’s open source, at least provide a link to the source code and instructions on how to reproduce the bug.

[SirTwist]

@Martin_fr and @Thaddy thanks for your input. I've now created a completly senseless project with just 30 units, and I wanted to irrationally cross link those units. But already with a generic definition in the first Unit "UTest01" and using that in "UTest02" is crashing the compiler. Tested with 3.2.3, currently fpcupdeluxe is installing 3.3.1.
I will raise a bug report.

[Fibonacci]

It does crash 3.2.2, but not 3.3.1 trunk/main.

[SirTwist]

It does crash 3.2.2, but not 3.3.1 trunk/main.

Thank you for trying it out!
Lazarus 4.9 (rev a181bda46a) FPC 3.2.3 x86_64-win64-win32/win64
is also crashing.

I have raised a bug report. Thank you all!

[Fibonacci]

Good luck - though the official 3.2.4 will probably take years to land, and may not even include the fix you need. I'd just use trunk and adjust your project to work with the latest trunk instead.

[jamie]

The recircle reference is the problem in the implementation section of unit01, remove the reference to unit02 and it's ok.

So, there are issues with generics in that respect.

P.S.
 Corrected, sorry.

Jamie