Macaulay2 / Macaulay2/M2

Error: not divisible in FreeAlgebra.create unit test

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Dominant language
Macaulay2
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435
Forks
297
Avg merge
4d 20h
Merged PRs (30d)
11

Description

From an [amd64 PPA build](https://launchpadlibrarian.net/572902367/buildlog_ubuntu-impish-amd64.macaulay2_1.19.1.1+git202112072115-0ppa202112032154~ubuntu21.10.1_BUILDING.txt.gz) of the development branch:

```
[----------] 5 tests from FreeAlgebra
[ RUN ] FreeAlgebra.create
Error: not divisible
NCGroebnerTest.cpp:270: Failure
Value of: false
Actual: false
Expected: true
[ FAILED ] FreeAlgebra.create (0 ms)
[ RUN ] FreeAlgebra.polyarithmetic
[ OK ] FreeAlgebra.polyarithmetic (0 ms)
[ RUN ] FreeAlgebra.quotientArithmetic
[ OK ] FreeAlgebra.quotientArithmetic (0 ms)
[ RUN ] FreeAlgebra.comparisons
[ OK ] FreeAlgebra.comparisons (0 ms)
[ RUN ] FreeAlgebra.spairs
[ OK ] FreeAlgebra.spairs (0 ms)
[----------] 5 tests from FreeAlgebra (1 ms total)
```
Possibly related to #2324?

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  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the FreeAlgebra.create test and the failure at NCGroebnerTest.cpp:270, then compare its output with the linked amd64 PPA build log. Determine why the test reports “Error: not divisible” while the other FreeAlgebra tests pass. Done means the failure is understood and FreeAlgebra.create passes reliably.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
testing-qa
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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