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remove unnecessary cast

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This commit is contained in:
Ralf Jung 2020-03-21 17:28:46 +01:00
parent d7e2650db2
commit f16b491015
1 changed files with 1 additions and 1 deletions
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src/librustc_mir/interpret/operand.rs
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@ -341,7 +341,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
// Turn the wide MPlace into a string (must already be dereferenced!)
pub fn read_str(&self, mplace: MPlaceTy<'tcx, M::PointerTag>) -> InterpResult<'tcx, &str> {
let len = mplace.len(self)?;
let bytes = self.memory.read_bytes(mplace.ptr, Size::from_bytes(u64::from(len)))?;
let bytes = self.memory.read_bytes(mplace.ptr, Size::from_bytes(len))?;
let str = ::std::str::from_utf8(bytes)
.map_err(|err| err_ub_format!("this string is not valid UTF-8: {}", err))?;
Ok(str)