BROKEN_TESTS.md

How to find the source code of a broken test?

1. Download the rust compiler source git clone https://github.com/rust-lang/rust.git --depth 1000
2. Go into the library directory
3. Serach for the name of your test grep -r "broken_test"

How to minimze a broken test?

1. After finding a broken test, extract it into a spearte crate.
2. Build the crate into native Rust using cargo test and check that it behaves as expcted.
3. IMPORTANT! Clean the build cache using cargo clean. NEVER skip this step, beacause it can lead to suprising results which may hide the real issue.
4. Build the crate using rustc_codegen_clr and observe the incorrect results.
5. Make a small change by removing \ simplifing some code in your example.
6. Clean the build cache using cargo clean again before rebuilding to prevent issues. DO NOT SKIP THS STEP.
7. Repeat steps 2-7 untill the test program can no longer be simplified.
8. Create an issue with your simplified broken test.

List of broken core test:

Did not compleate:

atomic::atomic_access_bool
atomic::bool_
atomic::int_max
atomic::int_min
atomic::int_nand
atomic::int_xor
atomic::ptr_bitops
atomic::uint_max
atomic::uint_min
atomic::uint_nand
atomic::uint_xor
cell::refcell_ref_coercion
future::test_join
hash::test_writer_hasher
iter::adapters::step_by::test_iterator_step_by_nth_try_fold
iter::range::test_range_advance_by
iter::test_monad_laws_left_identity
manually_drop::smoke
num::flt2dec::random::shortest_f32_exhaustive_equivalence_test
num::flt2dec::random::shortest_f64_hard_random_equivalence_test
num::i128::tests::test_saturating_abs
num::i128::tests::test_saturating_neg
num::int_log::checked_ilog
ptr::ptr_metadata
ptr::test_ptr_metadata_in_const
ptr::test_variadic_fnptr
result::result_try_trait_v2_branch
simd::testing
slice::select_nth_unstable
slice::take_in_bounds_max_range_from
slice::take_in_bounds_max_range_to
slice::take_mut_in_bounds_max_range_from
slice::take_mut_in_bounds_max_range_to
slice::take_mut_oob_max_range_to_inclusive
slice::take_oob_max_range_to_inclusive

Failed

num::i8::tests::test_pow
iter::adapters::flat_map::test_flat_map_try_folds
num::bignum::test_add_small_overflow
num::i16::tests::test_checked_next_multiple_of
slice::swap_panics::index_b_equals_len
num::bignum::test_mul_small_overflow
mem::uninit_fill_clone_panic_drop
num::i128::tests::test_lots_of_isqrt
iter::adapters::peekable::test_peek_try_folds
num::bignum::test_mul_digits_overflow_1
num::i8::tests::test_from_str_radix
net::ip_addr::ipv6_properties
num::test_int_from_str_overflow
iter::traits::double_ended::test_rev_try_folds
ascii::test_is_ascii_align_size_thoroughly
num::i16::tests::test_pow
slice::swap_panics::index_a_equals_len
net::ip_addr::ipv6_addr_to_string
iter::adapters::flatten::test_flatten_try_folds
num::bignum::test_get_bit_out_of_range
slice::take_last_nonempty
num::bignum::test_add_overflow_1
iter::adapters::skip::test_skip_try_folds
num::i16::tests::test_from_str
net::socket_addr::ipv6_socket_addr_to_string
iter::adapters::map::test_map_try_folds
cell::refcell_unsized
num::f32::min
iter::adapters::cloned::test_cloned_try_folds
num::bignum::test_from_u64_overflow
iter::adapters::flatten::test_flatten_one_shot
slice::take_first_nonempty
num::i16::tests::test_from_str_radix
num::f32::max
option::as_slice
num::u16::tests::test_rotate
iter::adapters::step_by::test_iterator_step_by_nth_try_rfold
iter::range::test_range_inclusive_folds
iter::adapters::take_while::test_take_while_folds
iter::adapters::take::test_take_try_folds
num::u16::tests::test_leading_trailing_ones
slice::swap_panics::index_b_greater_than_len
iter::adapters::skip_while::test_skip_while_try_fold
slice::take_first_mut_nonempty
num::f64::max
net::socket_addr::socket_v6_to_str
num::i16::tests::test_rotate
slice::swap_panics::index_a_greater_than_len
num::i8::tests::test_checked_next_multiple_of
num::bignum::test_mul_digits_overflow_2
num::f64::min
num::i8::tests::test_from_str
slice::take_last_mut_nonempty
iter::adapters::filter_map::test_filter_map_try_folds
ptr::from_raw_parts
num::u8::tests::test_leading_trailing_ones
num::i16::tests::test_leading_trailing_ones
num::i8::tests::test_leading_trailing_ones
iter::adapters::flatten::test_flatten_one_shot_rev
num::bignum::test_mul_pow5_overflow_2
num::bignum::test_add_overflow_2
num::u128::tests::test_pow
result::result_const
iter::adapters::filter::test_filter_try_folds
num::bignum::test_mul_pow2_overflow_2
num::i128::tests::test_pow

List of broken alloc tests:

Did not compleate:

arc::make_mut_unsized
arc::shared_from_iter_normal
arc::shared_from_iter_trustedlen_no_fuse
arc::shared_from_iter_trustedlen_normal
arc::shared_from_iter_trustedlen_panic
arc::slice
arc::trait_object
arc::uninhabited
autotraits::test_binary_heap
autotraits::test_btree_map
autotraits::test_btree_set
autotraits::test_linked_list
autotraits::test_vec_deque
borrow::test_from_cow_c_str
borrow::test_from_cow_os_str
borrow::test_from_cow_path
borrow::test_from_cow_slice
borrow::test_from_cow_str
heap::alloc_system_overaligned_request
rc::shared_from_iter_normal
rc::shared_from_iter_trustedlen_no_fuse
rc::shared_from_iter_trustedlen_normal
rc::shared_from_iter_trustedlen_panic
rc::slice
rc::trait_object
rc::uninhabited
slice::subslice_patterns
slice::test_split_last
string::test_try_reserve
task::test_local_waker_will_wake_clone
task::test_waker_will_wake_clone
thin_box::align1zst
thin_box::align2zst
thin_box::align64_size_not_pow2
thin_box::align64big
thin_box::align64med
thin_box::align64small
thin_box::align64zst
vec::test_try_reserve
vec_deque::test_try_reserve

Failed:

slice::test_split_first_mut
vec::test_index_out_of_bounds
vec::vec_macro_repeating_null_raw_fat_pointer
slice::test_split_first
vec::extract_if_unconsumed_panic
vec::extract_if_consumed_panic
vec_deque::test_try_rfold_moves_iter
vec_deque::test_try_fold_moves_iter
str::const_str_ptr
vec::test_collect_after_iterator_clone