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diff --git a/tests/ui-msrv/transmute-size-decrease.stderr b/tests/ui-msrv/transmute-size-decrease.stderr
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+error[E0512]: cannot transmute between types of different sizes, or dependently-sized types
+ --> tests/ui-msrv/transmute-size-decrease.rs:19:27
+ |
+19 | const DECREASE_SIZE: u8 = transmute!(AU16(0));
+ | ^^^^^^^^^^^^^^^^^^^
+ |
+ = note: source type: `AU16` (16 bits)
+ = note: target type: `u8` (8 bits)
+ = note: this error originates in the macro `transmute` (in Nightly builds, run with -Z macro-backtrace for more info)