Steps to reproduce

Refers to #48574 (comment) The error is encoded in a xfailing unit test.

@JohnGouwar reported in DM that the potential source of the issue is likely the topological order used in the splicing implementation, which is unstable. When the unit test fails:

[[email protected]/kdgv3sodjrdmvaejldwcl4vcjc4isoei, [email protected]/jpufqbulg2an2jh3olo2dpzcfbgfeir2, [email protected]/ry4yllp5frzp35bcxzxn64wjs2aahyuw, [email protected]/76rrwplin42mcyv4xeued5fwsz4t2d7r, [email protected]/ujzmt4yad7bfs6s5sr6puherehfegtrf, [email protected]/titp6gw3kqfej76bqzyvum3sinjxv2lu]

when the unit test passes:

[[email protected]/jpufqbulg2an2jh3olo2dpzcfbgfeir2, [email protected]/ry4yllp5frzp35bcxzxn64wjs2aahyuw, [email protected]/kdgv3sodjrdmvaejldwcl4vcjc4isoei, [email protected]/ujzmt4yad7bfs6s5sr6puherehfegtrf, [email protected]/76rrwplin42mcyv4xeued5fwsz4t2d7r, [email protected]/titp6gw3kqfej76bqzyvum3sinjxv2lu]

Error message

No error, but instabilities in spliced specs

Information on your system

• Spack: 0.24.0.dev0 (59a7195)
• Python: 3.13.0
• Platform: linux-ubuntu20.04-icelake

General 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