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Unsound implementation leads to misaligned pointer dereference
The source of unsoundness
First of all, there are similar unsound implementation in get
and put
.
Lines 60 to 61 in 3986072
Lines 51 to 52 in 3986072
They both tried to cast u8 to u64 and created a misaligned pointer. In
put
, the misaligned pointer was deref at line 61, and in get
, deref occurred at line 52.
To reproduce the bug
Simply running cargo test
could trigger the first undefined behavior
running 9 tests
test dictionary_old::tests::add ... ok
test paged_vector::tests::add_even_more ... ignored
test paged_vector::tests::add ... ok
test paged_vector::tests::add_some ... ok
Here
0/39 = 0
1/39 = 51
thread 'bit_array::tests::foo' panicked at 'misaligned pointer dereference: address must be a multiple of 0x8 but is 0x7fc1f4000d41', src/bit_array.rs:61:31
stack backtrace:
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