Fuzzing failure

[slide-bot]

Daily slide fuzzing failed. Last 30 lines of the output log are as follows:

Reproduce with:

	cargo fuzz run slide_fuzzer fuzz/artifacts/slide_fuzzer/slow-unit-3c88a97ff1d6557c235c51d7b4160c65253365cd

Minimize test case with:

	cargo fuzz tmin slide_fuzzer fuzz/artifacts/slide_fuzzer/slow-unit-3c88a97ff1d6557c235c51d7b4160c65253365cd


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Failing input:

	fuzz/artifacts/slide_fuzzer/crash-6ae63c336da0add2fa825c45f9c58f0ba5231a08

Output of `std::fmt::Debug`:

	"7x^371 / x"

Reproduce with:

	cargo fuzz run slide_fuzzer fuzz/artifacts/slide_fuzzer/crash-6ae63c336da0add2fa825c45f9c58f0ba5231a08

Minimize test case with:

	cargo fuzz tmin slide_fuzzer fuzz/artifacts/slide_fuzzer/crash-6ae63c336da0add2fa825c45f9c58f0ba5231a08

────────────────────────────────────────────────────────────────────────────────

Error: Fuzz target exited with exit code: 77

Download this test case at https://free.keep.sh/4q6ZJQnh0cRXc4W7/slow-unit-3c88a97ff1d6557c235c51d7b4160c65253365cd

Command run output

Fuzz output file

[ayazhafiz]

The problem is that polynomials are stored as arrays (so 7x^371 + x looks like 1 | ... 370 slots ... | 7), but this breaks down quickly when you need to do work with high-dimensional polynomial. So it's better to represent it as a dense graph of degree -> coefficient.