Changed assertion to try/catch construct with warning.
Changed assertion to try/catch construct with warning.

dan-blanchard/conda-build,dan-blanchard/conda-build,ilastik/conda-build,sandhujasmine/conda-build,dan-blanchard/conda-build,ilastik/conda-build,ilastik/conda-build,sandhujasmine/conda-build,sandhujasmine/conda-build