Failing ideal tests using Macaulay2 1.23 ("did not throw an error")

[d-torrance]

With Macaulay2 1.23, the m2r test suite fails with the following:

══ Failed tests ════════════════════════════════════════════════════════════════
── Failure ('test-ideal.R:145:3'): ideal_(list("x+y x^2+y^2"), raw_chars = TRUE) errors ──
`ideal_(list("x+y x^2+y^2"), raw_chars = TRUE)` did not throw an error.
── Failure ('test-ideal.R:322:3'): ideal_.(list("x+y x^2+y^2"), raw_chars = TRUE) errors ──
`ideal_.(list("x+y x^2+y^2"), raw_chars = TRUE)` did not throw an error.

This is because x + y x^2+y^2 is now valid Macaulay2 code. In particular, it interprets the middle term y x^2 like sub(y, {x => x^2, y => y}), which evaluates to y, and so the entire expression evaluates to y^2 + x + y.

[dkahle]

Hey @d-torrance, thanks for the shout. Got a good reference where I can I read more about that change in M2?

[d-torrance]

Here's the documentation for the new feature:

https://macaulay2.com/doc/Macaulay2/share/doc/Macaulay2/Macaulay2Doc/html/___Ring__Element_sp__Sequence.html