## Summary After a `nixpkgs` revision update, my GHC 9.10 build of IHaskell is failing with the following error: ``` ihaskell: internal error: ARR_WORDS object (0x4203ec35d8) entered! Stack trace: ihaskell: Failed to get stack frames of current process: No DWARF information found: Success 0x5827090 (null) (/nix/store/syzlkldvk6jyya2ch3324409ia179j1r-ihaskell-0.12.0.0/bin/ihaskell) 0x7f2dd9d8a1a8 dwfl_thread_getframes (/nix/store/hx43gnc9mwk61dzq7vd90ql8nlkifjjv-elfutils-0.192/lib/libdw-0.192.so) 0x7f2dd9d89bdb get_one_thread_cb (/nix/store/hx43gnc9mwk61dzq7vd90ql8nlkifjjv-elfutils-0.192/lib/libdw-0.192.so) 0x7f2dd9d89faa dwfl_getthreads (/nix/store/hx43gnc9mwk61dzq7vd90ql8nlkifjjv-elfutils-0.192/lib/libdw-0.192.so) 0x7f2dd9d8a514 dwfl_getthread_frames (/nix/store/hx43gnc9mwk61dzq7vd90ql8nlkifjjv-elfutils-0.192/lib/libdw-0.192.so) 0x58277d1 (null) (/nix/store/syzlkldvk6jyya2ch3324409ia179j1r-ihaskell-0.12.0.0/bin/ihaskell) 0x582f206 (null) (/nix/store/syzlkldvk6jyya2ch3324409ia179j1r-ihaskell-0.12.0.0/bin/ihaskell) 0x582f43c (null) (/nix/store/syzlkldvk6jyya2ch3324409ia179j1r-ihaskell-0.12.0.0/bin/ihaskell) 0x58639ed (null) (/nix/store/syzlkldvk6jyya2ch3324409ia179j1r-ihaskell-0.12.0.0/bin/ihaskell) (GHC version 9.10.1 for x86_64_unknown_linux) Please report this as a GHC bug: https://www.haskell.org/ghc/reportabug ``` ## Steps to reproduce 1. Check out https://github.com/IHaskell/IHaskell/pull/1571/commits/ab6d1a2e2e75956bf8d44a8b00accf527036dca8 2. Run `nix build .#ihaskell-env-ghc910` 3. Run `test/acceptance.nbconvert.sh result/bin/jupyter-nbconvert` or launch `result/bin/jupyter lab` and try to run a Haskell expression in a notebook ## Expected behavior The same steps work correctly on current `master`, e.g. https://github.com/IHaskell/IHaskell/commit/fefb187c617b958458244a3919200d5f091a6f6e. ## Environment * GHC version used: GHC 9.10 Optional: * Operating System: NixOS 24.11 * System Architecture: x86_64-linux