Track pre-existing LP unbounded status misclassification in B&B fallback mapping
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@mlubin is already working on this.
Since Jun 22, 2026.
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Description
A pre-existing status-mapping issue was identified in the branch-and-bound fallback LP status conversion path.
Context:
- The conversion helper in
cpp/src/branch_and_bound/branch_and_bound.cppmapslp_status_tvalues into dual-simplex status values for fallback solve paths. lp_status_t::UNBOUNDEDis not handled explicitly and can fall through to the generic numerical-status path.- This can cause an unbounded LP status to be reported or handled as a numerical issue in affected fallback paths.
Backlinks:
- PR: https://github.com/NVIDIA/cuopt/pull/1446
- Review discussion: https://github.com/NVIDIA/cuopt/pull/1446#discussion_r3453442458
Requested by: @mlubin
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