• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: OSX 10.14.6 (Mojave); also on a recent Ubuntu
• Poetry version: 1.1.0b2 (also 1.1.0a3)
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/dclayh/6325891755faa4215e288082491f8f4b

Issue

Downloading wheels from an Azure Devops feed fails with a 401 Unathorized error using http-basic authorization. This is true whether creds are set with poetry config or env vars. Version collection still succeeds from the private repo. This is a bug (or undocumented interface change?) with the 1.1.0 prereleases, since everything works fine with 1.0.5.

Snippet of poetry update -vvv output:

Package operations: 0 installs, 1 update, 0 removals

  • Updating data-utils (0.7.0 -> 0.6.20): Pending...
  • Updating data-utils (0.7.0 -> 0.6.20): Failed

HTTPError

401 Client Error: Unauthorized for url: https://guycarp.pkgs.visualstudio.com/9fb36d55-4aac-44bd-9e13-0d2773f027b9/_packaging/c31f3100-0441-4ca7-8b74-4f948c9eb523/pypi/download/data-utils/0.6.20/data_utils-0.6.20-py3-none-any.whl#sha256=40ba0db196547929b735f3aee626be3ebdc990c929d1f5c0623ba6affd129588