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Verify safety of NonZero operations (Challenge 12) #544

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Verify safety of NonZero operations (Challenge 12) #544

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a698020
Verify safety of NonZero operations (Challenge 12)
jrey8343 Feb 8, 2026
8267fcb
Apply upstream rustfmt formatting via check_rustc.sh --bless
jrey8343 Feb 11, 2026
b23d05f
Use bounded exponent for NonZeroI128/U128 saturating_pow harnesses
jrey8343 Feb 21, 2026
9d26114
Fix checked_pow_i128/u128 CBMC timeout: bound exponent to avoid explo…
jrey8343 Feb 21, 2026
b16b2db
Add missing isqrt harnesses for u64, u128, and usize
jrey8343 Apr 2, 2026
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1 change: 0 additions & 1 deletion library/core/src/num/int_macros.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1736,7 +1736,6 @@ macro_rules! int_impl {
let mut base = self;
let mut acc: Self = 1;

#[safety::loop_invariant(true)]
loop {
if (exp & 1) == 1 {
acc = try_opt!(acc.checked_mul(base));
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