Panics in code are causing problems for me

[omarandlorraine]

I appreciate that my project strop is unusual in that it needs to be able to run malformed code.

But here is where I am getting stuck:

thread 'main' (309758) panicked at /home/redacted/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/armagnac-0.3.0/src/arith.rs:57:5:
assertion failed: (shift > 0) && (shift < 32)

Here's what ARM docs say about shift values that are out of range:

This instruction shifts a register value right by a variable number of bits, shifting in copies of its sign bit, and writes the
result to the destination register. The value of the second source register modulo the register size in bits gives the number
of bits by which the first source register is right-shifted.

(DDI0487, Section C6.2.21)

So I'm not sure why this assert! is there. I understand that this operation would be undefined behaviour in C, but the ARM specification seems to define it.