Bug in rawSelectByDegrees
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- Dominant language
- Macaulay2
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Description
What is happening here?
```m2
R = ZZ/101[a..d, Degrees=>toList(4:{1,2})]
M = coker matrix"a,b;c,d"
SM = symmetricAlgebra M
debug Core
A = raw source matrix {{p_0, p_1}}
tally apply(100, i -> rawSelectByDegrees(A, {1}, {1}))
tally apply(100, i -> rawSelectByDegrees(A, {1}, {1,0,0}))
```
Example:
```m2
i18 : tally apply(100, i -> rawSelectByDegrees(A, {0}, {1,0,0}))
o18 = Tally{{} => 42 }
{0, 1} => 58
```
The input isn't valid, but absent of an error, the output is bizarre.
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Research direction
Reproduce the examples in the issue, starting with the rawSelectByDegrees calls on the raw source matrix A. Locate the implementation or entry point for rawSelectByDegrees and trace how invalid degree inputs are handled. Done means the invalid input has defined, non-bizarre behavior, preferably with a regression check for the shown cases.
Written by the indexing model from the issue text.
Assessment
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 45/100