Broken dependency in today update (GCC-9.1)

[angelog0]

Just now:

$ pacman -Syu
:: Sincronizzazione dei database in corso...
 mingw32                                   545,0 KiB   792K/s 00:01 [####################################] 100%
 mingw32.sig                               119,0   B  0,00B/s 00:00 [####################################] 100%
 mingw64                                   546,1 KiB   943K/s 00:01 [####################################] 100%
 mingw64.sig                               119,0   B  0,00B/s 00:00 [####################################] 100%
 msys è aggiornato
:: Starting core system upgrade...
 non ci sono aggiornamenti disponibili
:: Aggiornamento del sistema in corso...
risoluzione delle dipendenze in corso...
ricerca dei pacchetti in conflitto in corso...
errore: impossibile eseguire l'operazione richiesta (impossibile soddisfare le dipendenze)
:: installing mingw-w64-i686-gcc (9.1.0-1) breaks dependency 'mingw-w64-i686-gcc=7.4.0-1' required by mingw-w64-i686-gcc-ada
:: installing mingw-w64-i686-gcc (9.1.0-1) breaks dependency 'mingw-w64-i686-gcc=7.4.0-1' required by mingw-w64-i686-gcc-objc
:: installing mingw-w64-x86_64-gcc (9.1.0-1) breaks dependency 'mingw-w64-x86_64-gcc=8.3.0-2' required by mingw-w64-x86_64-gcc-ada
:: installing mingw-w64-x86_64-gcc (9.1.0-1) breaks dependency 'mingw-w64-x86_64-gcc=8.3.0-2' required by mingw-w64-x86_64-gcc-objc

How to fix?

[Alexpux]

Remove Ada and ObjC packages. They are dropped now.

[Ede123]

Is there a good option to do this in CI environments which are broken because of this?
Or is "manually" uninstalling the only way?

[Alexpux]

I think only manually can do

[Biswa96]

I have this error in pacman:

resolving dependencies...
looking for conflicting packages...
error: failed to prepare transaction (could not satisfy dependencies)
:: installing mingw-w64-x86_64-gcc (9.1.0-1) breaks dependency 'mingw-w64-x86_64-gcc=8.3.0-2' required by mingw-w64-x86_64-gcc-ada
:: installing mingw-w64-x86_64-gcc (9.1.0-1) breaks dependency 'mingw-w64-x86_64-gcc=8.3.0-2' required by mingw-w64-x86_64-gcc-objc

[lazka]

Is there a good option to do this in CI environments which are broken because of this?

# Workaround gcc9 update issues
pacman -R --noconfirm mingw-w64-i686-gcc-ada mingw-w64-i686-gcc-objc || true;
pacman -R --noconfirm mingw-w64-x86_64-gcc-ada mingw-w64-x86_64-gcc-objc || true;

[Ede123]

Yes, that's what I referred to as "manually" and implemented accordingly.

The obvious problem is that this requires manual intervention and does not prevent the CI from failing if this type of conflict occurs for a different package in future.

[Optiligence]

To alleviate this problem the gcc PKGBUILD could make use of replaces

One could say that the usage would be incorrect, but I would argue that the benefits outweigh that argument here.

[lazka]

The obvious problem is that this requires manual intervention and does not prevent the CI from failing if this type of conflict occurs for a different package in future.

Yeah, agreed, this came up @ https://gitter.im/msys2/msys2?at=5cee3b899b50f639354862e5

[angelog0]

@Alexpux wrote:

Remove Ada and ObjC packages. They are dropped now.

What a pity!

Ok, fixed now... and closing the issue...

[Ede123]

The obvious problem is that this requires manual intervention and does not prevent the CI from failing if this type of conflict occurs for a different package in future.

Yeah, agreed, this came up @ https://gitter.im/msys2/msys2?at=5cee3b899b50f639354862e5

I see, so it's not obvious if this even is solvable without causing more trouble... (Oh, and thanks for pointing towards gitter, I always thought IRC was the most official communication channel for MSYS2).