When I run a newer version of spack to recreate an environment that used to work I get the following error:

spack -d env create foo ~/spack.git/var/spack/environments/lbann-dev-power9le/spack.yaml
==> Error: 'syaml_str' object has no attribute 'lc'

Steps to reproduce the issue

$ spack -d env create foo ~/spack.git/var/spack/environments/lbann-dev-power9le/spack.yaml
...

Error Message

==> Error: 'syaml_str' object has no attribute 'lc'

Information on your system

This failed on Lassen.

vanessen@lassen709 [spack_test.git] %> spack debug report

• Spack: 0.14.2-1172-46ab939
• Python: 3.7.2
• Platform: linux-rhel7-power9le

Additional information

• I have run spack debug report and reported the version of Spack/Python/Platform
• I have searched the issues of this repo and believe this is not a duplicate
• I have run the failing commands in debug mode and reported the output