mir_transform_arithmetic_overflow = this arithmetic operation will overflow mir_transform_const_defined_here = `const` item defined here mir_transform_const_modify = attempting to modify a `const` item .note = each usage of a `const` item creates a new temporary; the original `const` item will not be modified mir_transform_const_mut_borrow = taking a mutable reference to a `const` item .note = each usage of a `const` item creates a new temporary .note2 = the mutable reference will refer to this temporary, not the original `const` item .note3 = mutable reference created due to call to this method mir_transform_exceeds_mcdc_test_vector_limit = number of total test vectors in one function will exceed limit ({$max_num_test_vectors}) if this decision is instrumented, so MC/DC analysis ignores it mir_transform_ffi_unwind_call = call to {$foreign -> [true] foreign function *[false] function pointer } with FFI-unwind ABI mir_transform_fn_item_ref = taking a reference to a function item does not give a function pointer .suggestion = cast `{$ident}` to obtain a function pointer mir_transform_must_not_suspend = {$pre}`{$def_path}`{$post} held across a suspend point, but should not be .label = the value is held across this suspend point .note = {$reason} .help = consider using a block (`{"{ ... }"}`) to shrink the value's scope, ending before the suspend point mir_transform_operation_will_panic = this operation will panic at runtime mir_transform_tail_expr_drop_order = relative drop order changing in Rust 2024 .temporaries = in Rust 2024, this temporary value will be dropped first .observers = in Rust 2024, this local variable or temporary value will be dropped second .note_dtors = dropping the temporary value runs this custom `Drop` impl, which we could not prove to be side-effect free .note_observer_dtors = dropping the local runs this custom `Drop` impl, which we could not prove to be side-effect free .drop_location = now the temporary value is dropped here, before the local variables in the block or statement .note_epilogue = most of the time, changing drop order is harmless; inspect the `impl Drop`s for side effects like releasing locks or sending messages .label_local_epilogue = {$is_dropped_first_edition_2024 -> [true] up until Edition 2021 `{$name}` is dropped last but will be dropped earlier in Edition 2024 *[false] `{$name}` will be dropped later as of Edition 2024 } mir_transform_tail_expr_dtor = {$dtor_kind -> [dyn] `{$name}` may invoke a custom destructor because it contains a trait object *[concrete] `{$name}` invokes this custom destructor } mir_transform_tail_expr_local = {$is_generated_name -> [true] this value will be stored in a temporary; let us call it `{$name}` *[false] `{$name}` calls a custom destructor } mir_transform_unaligned_packed_ref = reference to packed field is unaligned .note = packed structs are only aligned by one byte, and many modern architectures penalize unaligned field accesses .note_ub = creating a misaligned reference is undefined behavior (even if that reference is never dereferenced) .help = copy the field contents to a local variable, or replace the reference with a raw pointer and use `read_unaligned`/`write_unaligned` (loads and stores via `*p` must be properly aligned even when using raw pointers) mir_transform_undefined_transmute = pointers cannot be transmuted to integers during const eval .note = at compile-time, pointers do not have an integer value .note2 = avoiding this restriction via `union` or raw pointers leads to compile-time undefined behavior .help = for more information, see https://doc.rust-lang.org/std/mem/fn.transmute.html mir_transform_unknown_pass_name = MIR pass `{$name}` is unknown and will be ignored