fdLock: invalid argument on i386 linux cabal 3.4.0.0 via ghcup

[tomjaguarpaw]

I'm seeing the dreaded fdLock: invalid argument.

To Reproduce

$ ~/.ghcup/bin/cabal-3.4.0.0 v2-update
Downloading the latest package list from hackage.haskell.org
fdLock: invalid argument (Invalid argument)

(I got my cabal-3.4.0.0 via ./i386-linux-ghcup install cabal 3.4.0.0.)

Anyone else seeing this?

[tomjaguarpaw]

I can confirm that this problem also occurs on cabal-3.4.0.0 built from source.

[phadej]

What's your

• kernel version
• glibc version

EDIT: this might be duplicate of haskellari/lukko#15 and #6602

[tomjaguarpaw]

% uname -a
Linux henry 4.19.0-13-686 #1 SMP Debian 4.19.160-2 (2020-11-28) i686 GNU/Linux
% dpkg -l libc6
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
ii  libc6:i386     2.29-3       i386         GNU C Library: Shared libraries

[tomjaguarpaw]

I believe it is a duplicate! Should we close this issue then?

[phadej]

Yes, I'd say this is lukko issue (15). I have no plans to work on it though (I have no machines to test).

EDIT: I still recommend -ofd-locking for 32bit Linux. I don't know how official cabal-install-3.4.0.0 bindist is compiled (I didn't make it).

[tomjaguarpaw]

I can confirm that it works if I compile with

cabal-3.2.0.0 v2-install cabal-install-3.4.0.0 --constraint 'lukko -ofd-locking' ...

Perhaps the bindist should be updated to fix this.

[hasufell]

ghcup now uses an updated bindist: https://gitlab.haskell.org/haskell/ghcup-hs/-/commit/7e0f839ff8f91cb7cfc78eaa57782bc1af30dc4b

https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.4.0.0/cabal-install-3.4.0.0-i386-unknown-linux.tar.xz