$ cargo build --release --target armv7-unknown-linux-gnueabihf
   Compiling repro v0.1.0
thread 'rustc' panicked at 'assertion failed: `(left == right)`
  left: `Size { raw: 92 }`,
 right: `Size { raw: 88 }`', src/librustc_codegen_llvm/type_of.rs:148:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.38.0-nightly (dddb7fca0 2019-07-30) running on x86_64-unknown-linux-gnu

note: compiler flags: -C opt-level=3 -C linker=arm-linux-gnueabihf-gcc --crate-type bin

note: some of the compiler flags provided by cargo are hidden

error: Could not compile `repro`.

To learn more, run the command again with --verbose.