Memory leak in Letterplace

[Simon King]

I don't know if the following memory leak in Letterplace has been fixed in more recent versions of Singular. In any case, in version 3-1-7 shipped with Sage, I get:

> LIB "freegb.lib";
...
> ring r = 0,(x,y,z),dp;
> def R = makeLetterplaceRing(30);
> setring R;
> poly p = x(1)*x(2)*x(3)*x(4) + x(1)*y(2)*x(3)*z(4) + 2*z(1)*z(2)*x(3)*y(4);
> poly q = lpPower(p,7);
> memory(0); memory(1);  memory(2);
3494384
8634368
8667136
> q = lpPower(p,7);
> memory(0); memory(1);  memory(2);
5393576
10731520
10764288
> q = lpPower(p,7);
> memory(0); memory(1);  memory(2);
7292768
12828672
12861440
> q = lpPower(p,7);
> memory(0); memory(1);  memory(2);
9191960
14925824
14958592
> q = lpPower(p,7);
> memory(0); memory(1);  memory(2);
11091152
17022976
17055744

[Simon King]

PS: I think memory leaks generally are "major", not "minor".

[hannes]

fixed with 0b51f6a84259fb2407bab08b6cd743bf83f0e420

[hannes]

​https://github.com/Singular/Sources/commit/0b51f6a84259fb2407bab08b6cd743bf83f0e420