tests/fail/function_calls/arg_inplace_mutate.stack.stderr

error: Undefined Behavior: not granting access to tag <TAG> because that would remove [Unique for <TAG>] which is strongly protected
  --> tests/fail/function_calls/arg_inplace_mutate.rs:LL:CC
   |
LL |     unsafe { ptr.write(S(0)) };
   |              ^^^^^^^^^^^^^^^ Undefined Behavior occurred here
   |
   = help: this indicates a potential bug in the program: it performed an invalid operation, but the Stacked Borrows rules it violated are still experimental
   = help: see https://github.com/rust-lang/unsafe-code-guidelines/blob/master/wip/stacked-borrows.md for further information
help: <TAG> was created by a SharedReadWrite retag at offsets [0x0..0x4]
  --> tests/fail/function_calls/arg_inplace_mutate.rs:LL:CC
   |
LL | /     mir! {
LL | |         let _unit: ();
LL | |         {
LL | |             let non_copy = S(42);
...  |
LL | |     }
   | |_____^
help: <TAG> is this argument
  --> tests/fail/function_calls/arg_inplace_mutate.rs:LL:CC
   |
LL |     unsafe { ptr.write(S(0)) };
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: stack backtrace:
           0: callee
               at tests/fail/function_calls/arg_inplace_mutate.rs:LL:CC
           1: main
               at tests/fail/function_calls/arg_inplace_mutate.rs:LL:CC
   = note: this error originates in the macro `::core::intrinsics::mir::__internal_remove_let` which comes from the expansion of the macro `mir` (in Nightly builds, run with -Z macro-backtrace for more info)

note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace

error: aborting due to 1 previous error