Fixes#49403.
When one scope included another, we were appending to a list stored on the scope to
track what was included, and we would clear the list when the scope was removed.
This assumes that the scopes are always strictly pushed then popped, but the order can
be violated when serializing config scopes across processes (and then activating
environments in subprocesses), or if, e.g., instead of removing each scope we simply
cleared the list of config scopes. Removal can be skipped, which can cause the list of
includes on a cached scope (like the one we use for environments) to grow every time it
is pushed, and this triggers an assertion error.
There isn't actually a need to construct and destroy the include list. We can just
compute it once and cache it -- it's the same every time.
- [x] Cache included scope list on scope objects
- [x] Do not dynamically append/clear the included scope list
Signed-off-by: Todd Gamblin <tgamblin@llnl.gov>
4f6836c878