stack 1.5.1 broken on 18.04 (AesonException)

[Janne Blomqvist]

Installing the package "haskell-stack" and then trying to run the ghci interpreter results in

❯ stack ghci
Writing implicit global project config file to: /home/janne/.stack/global-project/stack.yaml
Note: You can change the snapshot via the resolver field there.
Using latest snapshot resolver: lts-12.5
Downloaded lts-12.5 build plan.
AesonException "Error in $.packages.cassava.constraints.flags['bytestring--lt-0_10_4']: Invalid flag name: \"bytestring--lt-0_10_4\""

Per https://github.com/commercialhaskell/stackage/issues/2759 and https://github.com/commercialhaskell/stack/issues/3345 this is apparently a bug in stack which has subsequently been fixed. Indeed downloading and installing the latest stack per the instructions at https://docs.haskellstack.org/en/stable/README/ works.

More info as requested in bug reporting guidelines:

1)

❯ lsb_release -rd
Description: Ubuntu 18.04.1 LTS
Release: 18.04

2) haskell-stack version 1.5.1-1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ahmad Jagot (ahmadjagot)]

Any update? This bug still exists.

[Oliver Anteros (olian04)]

Just ran into this issue. Are there any updates on this?

[Tin Aung Win (tinaungwin)]

Exact same problem in Ubuntu 18.04 - except it was for lts-13.2. No issues for Windows version though.
Look like the bug lives through the versions.

[Camilla (kiwiremote)]

Same problem. Ubuntu 18.04, LTS-13.16

[WUTOU (anchroom)]

Still have it, same problem too.

[Alexandre Horst (alehorst)]

I have the same problem with Ubuntu 18.04, lts-13.17. (Linux Subsystem on Windows 10).

[mathiajusth (mathiajusth)]

Had the same problem. This worked

1. uninstalling haskell-cabal with apt

2. installing it agains with curl

    curl -sSL https://get.haskellstack.org/ | sh

as it is recommended (https://docs.haskellstack.org/en/stable/README/#how-to-install)