yeah exactly:
```
#0  core::ub_checks::maybe_is_aligned_and_not_null::runtime (ptr=0x42004019, align=1, is_zst=false)
    at /home/irees/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ub_checks.rs:127
#1  core::ub_checks::maybe_is_aligned_and_not_null (ptr=0x42004019, align=1, is_zst=false)
    at /home/irees/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/intrinsics/mod.rs:3241
#2  core::ptr::read_volatile::precondition_check (addr=0x42004019, align=1, is_zst=false)
    at /home/irees/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ptr/mod.rs:1746
#3  0x00004f26 in core::ptr::read_volatile<u8> (src=0x42004019)
    at /home/irees/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/ub_checks.rs:75
#4  0x000007f2 in vcell::VolatileCell<u8>::get<u8> (self=0x42004019)
    at /home/irees/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/vcell-0.1.3/src/lib.rs:33
#5  atsamd21g::generic::Reg<atsamd21g::adc::status::StatusSpec>::read<atsamd21g::adc::status::StatusSpec> (self=0x42004019)
    at pac/atsamd21g/src/generic.rs:490
#6  atsamd_hal::peripherals::adc::Adc<atsamd_hal::peripherals::adc::impls::Adc0>::sync<atsamd_hal::peripherals::adc::impls::Adc0> (
    self=0x20007f5c) at hal/src/peripherals/adc/d11/mod.rs:105
```