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Fix overflow checking in shift operator

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hkalbasi 2023-07-01 17:16:56 +03:30
parent bb85a980e0
commit 15a0da6f30
2 changed files with 7 additions and 1 deletions
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7
crates/hir-ty/src/mir/eval.rs
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@ -1037,13 +1037,18 @@ impl Evaluator<'_> {
BinOp::Shr => l128.checked_shr(shift_amount),
_ => unreachable!(),
};
if shift_amount as usize >= lc.len() * 8 {
return Err(MirEvalError::Panic(format!(
"Overflow in {op:?}"
)));
}
if let Some(r) = r {
break 'b r;
}
};
return Err(MirEvalError::Panic(format!("Overflow in {op:?}")));
};
check_overflow(r)?
Owned(r.to_le_bytes()[..lc.len()].to_vec())
}
BinOp::Offset => not_supported!("offset binop"),
}