[INFO] fetching crate db-core 0.2.0...
[INFO] checking db-core-0.2.0 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate db-core 0.2.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate db-core 0.2.0 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate db-core 0.2.0
[INFO] finished tweaking crates.io crate db-core 0.2.0
[INFO] tweaked toml for crates.io crate db-core 0.2.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7df8412b0581c9558a96f2201669a0a3115415e5735dd227e5158f24fe5631da
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7df8412b0581c9558a96f2201669a0a3115415e5735dd227e5158f24fe5631da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7df8412b0581c9558a96f2201669a0a3115415e5735dd227e5158f24fe5631da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7df8412b0581c9558a96f2201669a0a3115415e5735dd227e5158f24fe5631da", kill_on_drop: false }`
[INFO] [stdout] 7df8412b0581c9558a96f2201669a0a3115415e5735dd227e5158f24fe5631da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77d9bf07a2ef3fe0458628672d49d85fb9a33893374da14cec7b924238a87947
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "77d9bf07a2ef3fe0458628672d49d85fb9a33893374da14cec7b924238a87947", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking db-core v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stdout] warning: use of deprecated type alias `std::alloc::LayoutErr`: Name does not follow std convention, use LayoutError
[INFO] [stdout]    --> src/common/errors.rs:219:17
[INFO] [stdout]     |
[INFO] [stdout] 219 |     std::alloc::LayoutErr, IncorrectLayout, layout_err,
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `std::alloc::LayoutErr`: Name does not follow std convention, use LayoutError
[INFO] [stdout]    --> src/common/errors.rs:209:79
[INFO] [stdout]     |
[INFO] [stdout] 209 |     IncorrectLayout             , incorrect_layout              , std::alloc::LayoutErr,
[INFO] [stdout]     |                                                                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::sync::atomic::spin_loop_hint`: use hint::spin_loop instead
[INFO] [stdout]    --> src/common/intercom.rs:202:33
[INFO] [stdout]     |
[INFO] [stdout] 202 |             core::sync::atomic::spin_loop_hint();
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/log_mgr/buf.rs:112:52
[INFO] [stdout]     |
[INFO] [stdout] 112 |             let cur_acq_size = self.acquire_size.0.compare_and_swap(
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/log_mgr/buf.rs:182:52
[INFO] [stdout]     |
[INFO] [stdout] 182 |             let cur_acq_size = self.acquire_size.0.compare_and_swap(
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stdout] warning: field is never read: `write_ready`
[INFO] [stdout]   --> src/buf_mgr/buf_writer.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     write_ready:        SyncNotification<usize>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `wait_time`
[INFO] [stdout]    --> src/log_mgr/buf.rs:244:5
[INFO] [stdout]     |
[INFO] [stdout] 244 |     wait_time:   u64,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `wait_count`
[INFO] [stdout]    --> src/log_mgr/buf.rs:245:5
[INFO] [stdout]     |
[INFO] [stdout] 245 |     wait_count:  u64,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_extent_bit`
[INFO] [stdout]    --> src/block_mgr/free_info.rs:121:12
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub fn set_extent_bit(&self, file_id: u16, extent_id: u16, set: bool) -> Result<(), Error> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `used_iter`
[INFO] [stdout]    --> src/block_mgr/free_info.rs:321:12
[INFO] [stdout]     |
[INFO] [stdout] 321 |     pub fn used_iter(&self) -> FiDataIter {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `delete_entry`
[INFO] [stdout]    --> src/block_mgr/block.rs:276:12
[INFO] [stdout]     |
[INFO] [stdout] 276 |     pub fn delete_entry(&mut self, entry_id: u16) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mark_extent_full`
[INFO] [stdout]   --> src/block_mgr/allocator.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn mark_extent_full(&self, file_id: u16, extent_id: u16) -> Result<(), Error> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_free_info_free`
[INFO] [stdout]    --> src/block_mgr/allocator.rs:127:12
[INFO] [stdout]     |
[INFO] [stdout] 127 |     pub fn set_free_info_free(&self, block_id: &BlockId) -> Result<(), Error> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `std::alloc::LayoutErr`: Name does not follow std convention, use LayoutError
[INFO] [stdout]    --> src/common/errors.rs:219:17
[INFO] [stdout]     |
[INFO] [stdout] 219 |     std::alloc::LayoutErr, IncorrectLayout, layout_err,
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated type alias `std::alloc::LayoutErr`: Name does not follow std convention, use LayoutError
[INFO] [stdout]    --> src/common/errors.rs:209:79
[INFO] [stdout]     |
[INFO] [stdout] 209 |     IncorrectLayout             , incorrect_layout              , std::alloc::LayoutErr,
[INFO] [stdout]     |                                                                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::sync::atomic::spin_loop_hint`: use hint::spin_loop instead
[INFO] [stdout]    --> src/common/intercom.rs:202:33
[INFO] [stdout]     |
[INFO] [stdout] 202 |             core::sync::atomic::spin_loop_hint();
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/log_mgr/buf.rs:112:52
[INFO] [stdout]     |
[INFO] [stdout] 112 |             let cur_acq_size = self.acquire_size.0.compare_and_swap(
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/log_mgr/buf.rs:182:52
[INFO] [stdout]     |
[INFO] [stdout] 182 |             let cur_acq_size = self.acquire_size.0.compare_and_swap(
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `write_ready`
[INFO] [stdout]   --> src/buf_mgr/buf_writer.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     write_ready:        SyncNotification<usize>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `wait_time`
[INFO] [stdout]    --> src/log_mgr/buf.rs:244:5
[INFO] [stdout]     |
[INFO] [stdout] 244 |     wait_time:   u64,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `wait_count`
[INFO] [stdout]    --> src/log_mgr/buf.rs:245:5
[INFO] [stdout]     |
[INFO] [stdout] 245 |     wait_count:  u64,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mark_extent_full`
[INFO] [stdout]   --> src/block_mgr/allocator.rs:93:12
[INFO] [stdout]    |
[INFO] [stdout] 93 |     pub fn mark_extent_full(&self, file_id: u16, extent_id: u16) -> Result<(), Error> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]     --> src/block_mgr/block.rs:1128:9
[INFO] [stdout]      |
[INFO] [stdout] 1128 |         &mut entry4_buf.copy_from_slice(entry.data);
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]      |
[INFO] [stdout] 1128 |         let _ = &mut entry4_buf.copy_from_slice(entry.data);
[INFO] [stdout]      |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.59s
[INFO] running `Command { std: "docker" "inspect" "77d9bf07a2ef3fe0458628672d49d85fb9a33893374da14cec7b924238a87947", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77d9bf07a2ef3fe0458628672d49d85fb9a33893374da14cec7b924238a87947", kill_on_drop: false }`
[INFO] [stdout] 77d9bf07a2ef3fe0458628672d49d85fb9a33893374da14cec7b924238a87947