Concretizer: 'xsdk' version in package is wrongly accepted #17145
Description
Related to #9445: concretizing an older nonexistent version is causing an xsdk version to be accepted even though the xsdk tags are not related to the actual version number.
Steps to reproduce the issue
$ spack spec superlu-dist@:4.3
Input spec
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superlu-dist@:4.3
Concretized
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[email protected] <snip...>Information on your system
$ spack debug report
* **Spack:** 0.14.2-1466-32e5480ae
* **Python:** 3.7.6
* **Platform:** linux-rhel7-skylake_avx512
Additional information
- I have run
spack debug reportand 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