| 3 Aug 2025 |
|  prescientmoon changed their display name from Adriel to prescientmoon. | 14:31:42 |
| 4 Aug 2025 |
 Marc Jakobi | Has anyone else noticed a significant increase in memory when compiling Haskell packages with ghc 9.8.4 compared to ghc 9.6.6? I haven't been able to pinpoint it yet and I can't reproduce it outside of nix builds. | 09:45:42 |
 ners | Does this happen on the same nixpkgs pin, e.g. nix build nixpkgs#haskell.packages.ghc984.rhine vs nix build nixpkgs#haskell.packages.ghc966.rhine? | 10:09:07 |
| Marc Jakobi | In reply to @ners:nixos.dev
Does this happen on the same nixpkgs pin, e.g. nix build nixpkgs#haskell.packages.ghc984.rhine vs nix build nixpkgs#haskell.packages.ghc966.rhine? It doesn't even happen for all packages. I'm trying to build the same package with ghc 9.6, but it's failing to build singletons-th (or singletons-th_3_5), which is one of the dependencies - which kind of adds to my suspicion that this may be a template-haskell regression. | 14:28:51 |
| Marc Jakobi | Yep, no matter how I try to override or jailbreak packages, I can't seem escape dependency hell if I use another ghc version. | 15:13:23 |
 Teo (he/him) | Are you able to reproduce this outside of nix? Might be good to open a GHC ticket if you can confirm it's a GHC issue | 15:31:08 |
| Teo (he/him) | Oh you already said you couldn't reproduce it outside of nix builds | 15:34:38 |
 sterni (he/him) | teo (they/he): I mean what you could put on your GHC review pile is my never reviewed MR :p https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13932 | 16:30:06 |
| Teo (he/him) | Will do! Feel free to tag me in the future too. It's a real shame that that slipped through the cracks | 16:31:20 |
| Teo (he/him) | I hadn't realized you were already trying to build a stage2 compiler for these configurations. I know that isn't supported in hadrian in general and that's being fixed in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/11444. But maybe it would be supported in this case and something is just going wrong with this flag. I'll look into it and see if there's an easy fix | 16:33:24 |
