diff options
| -rw-r--r-- | lib/spack/spack/spec.py | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/spack/spack/spec.py b/lib/spack/spack/spec.py index e34f2b799d..6cf80754a1 100644 --- a/lib/spack/spack/spec.py +++ b/lib/spack/spack/spec.py @@ -1388,8 +1388,9 @@ class Spec(object): dependent = dep_spec.parent deptypes = dep_spec.deptypes - # remove self from all dependents. - del dependent._dependencies[self.name] + # remove self from all dependents, unless it is already removed + if self.name in dependent._dependencies: + del dependent._dependencies[self.name] # add the replacement, unless it is already a dep of dependent. if concrete.name not in dependent._dependencies: |