Stack trace on render()

[bkreider]

I'm definitely doing it wrong, but this should still be caught and handled:

In [4]: p = Path("./meta.yaml")

In [5]: p
Out[5]: PosixPath('meta.yaml')

In [6]: r = recipe.render(p)
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Input In [6], in <cell line: 1>()
----> 1 r = recipe.render(p)

File /opt/anaconda/lib/python3.9/site-packages/percy/render/recipe.py:746, in render(recipe_path, subdir, python, others, return_exceptions)
    744 if others is None:
    745     others = {"r_implementation": "r-base", "rust_compiler": "rust"}
--> 746 variants = read_conda_build_config(recipe_path, subdir, python, others)
    748 # render for each variant and combine similar results
    749 render_results = []

File /opt/anaconda/lib/python3.9/site-packages/percy/render/variants.py:263, in read_conda_build_config(recipe_path, subdir, python, others, variant_config_files, exclusive_config_files)
    261     if k not in zip_keys and type(v) is list and len(v) > 1:
    262         groups[k] = v
--> 263 group_keys, group_values = zip(*groups.items())
    264 group_permutations = [
    265     dict(zip(group_keys, v)) for v in itertools.product(*group_values)
    266 ]
    267 for d in group_permutations:

ValueError: not enough values to unpack (expected 2, got 0)

[schuylermartin45]

Tracking: https://anaconda.atlassian.net/browse/PAT-168