cargo-show-asm: Panic running with `--rust` and `--everything`

Issue: Running cargo asm --rust --everything panics and outputs this error: thread 'main' panicked at 'index out of bounds: the len is 0 but the index is 210'

stack backtrace:

0: rust_begin_unwind
1: core::panicking::panic_fmt
2: core::panicking::panic_bounds_check
3: cargo_show_asm::asm::dump_range
4: cargo_show_asm::asm::dump_function
5: cargo_asm::main