Met an Error of misaligned memory access when tried with sqlparser crate

[silathdiir]

Hi, this is really a good project!

I tried to use the VM to write some examples with crates (nostd, default-features = false) in a simple project, most work well for me!

But I failed in a simple example with sqlparser-rs in this code, it reports the error of misaligned memory access. This code could work well in a normal project (without VM), I tried to debug it, seems the SQL tokens are parsed wrong from the string (may be caused by macro).
Do you have any ideas about this eror? Thanks.

[danielmarinq]

Thanks @silathdiir! Great catch. Might be because of the memory allocator failing to allocate the string as expected by the parser.

@govereau or @sjudson, what do you think?

[danielmarinq]

It might be due to the allocator here: https://github.com/nexus-xyz/nexus-zkvm/blob/main/runtime/src/lib.rs

[govereau]

I was able to reproduce with the riscv VM using Paged memory, both release and debug with a larger memory size. Looks like a real unaligned access from the rust compiler.