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[bug] Recent conan release breaks gsl-lite package from conan-center

See original GitHub issue

Environment Details (include every applicable attribute)

Operating System+version: Ubuntu 18.04 (WSL1 on Windows 10 1809)
Compiler+version: gcc 8
Conan version: 1.34.0
Python version: 3.6.9

Steps to reproduce (Include if Applicable)

In an empty folder, create a conanfile.txt with the following

[requires]
gsl-lite/0.34.0

Then run conan install. This works fine on Conan 1.30.2. On Conan 1.34.0 it fails with:

ERROR: .../.conan/data/gsl-lite/0.34.0/_/_/export/conanfile.py: Recipe 'description' must be a string.

Sure enough, the description in the package is a tuple of strings:

    description = ("A single-file header-only version of ISO C++ ",
                   "Guideline Support Library (GSL) for C++98, C++11 and later")

This seems to be due to this PR: https://github.com/conan-io/conan/pull/8143

The restriction seems well justified, but this breaks packages on conan-center, which I depend on and have been using for a long time. Is there a way to either except tuple-of-string descriptions, or roll back the change until the packages on conan-center have a chance to update?

I also filed an issue with Conan Center to work around the issue on their end: https://github.com/conan-io/conan-center-index/issues/4726

Issue Analytics

State:
Created 3 years ago
Comments:5 (5 by maintainers)

Top GitHub Comments

1reaction

memshardedcommented, Feb 28, 2021

Hi @parkertomatoes

I have just tried and it is working now, the recipe description is a string now:

 description = "A single-file header-only version of ISO C++ " \
                  "Guideline Support Library (GSL) for C++98, C++11 and later"

are you sure you have updated to last changes from ConanCenter?

Btw, this doesn’t seem a bug in Conan, see (https://github.com/conan-io/conan/pull/8143#issuecomment-787524810), but basically, the description field is a string, as documented in https://docs.conan.io/en/latest/reference/conanfile/attributes.html#description. Any other type is a recipe bug, and can raise or produce any undefined behavior.

0reactions

uilianriescommented, Mar 4, 2021

@memsharded I can confirm, it’s a cache/outdated package problem, not a Conan bug.

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