crash using gbTrace in free resolutions

[mikestillman]

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The following crashes Macaulay2.

gbTrace=3 -- 1 and 2 work fine! >= 3 seem to crash
kk = ZZ/32003;
S = kk[a..d];
I = ideal(b^2-a*c, b*c - a*d, c^2-b*d)
res(module I, Strategy => 0) -- CRASH!!