I tried this code:

fn main() {
    let _ = &[(); usize::MAX];
}

I expected to see this happen: code compiles in a reasonable amount of times or the slice gets elided entirely.

Instead, this happened: code takes multiple minutes to compile/gets killed by the playground.

Meta

rustc --version --verbose:

rustc 1.48.0-nightly (9b4154193 2020-09-14)
binary: rustc
commit-hash: 9b4154193e8471f36b1a9e781f1ef7d492fc6a6c
commit-date: 2020-09-14
host: x86_64-pc-windows-msvc
release: 1.48.0-nightly
LLVM version: 11.0

Also tested on playground stable and nightly.