[INFO] cloning repository https://github.com/problame/libzfs-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/problame/libzfs-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fproblame%2Flibzfs-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fproblame%2Flibzfs-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 74d07deef85b6da7918f2a1937721b470d9fa9dd
[INFO] checking problame/libzfs-rs against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fproblame%2Flibzfs-rs" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/problame/libzfs-rs on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/problame/libzfs-rs
[INFO] finished tweaking git repo https://github.com/problame/libzfs-rs
[INFO] tweaked toml for git repo https://github.com/problame/libzfs-rs written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/problame/libzfs-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98ac14eb9d658fee37b5a9a2ed4a64b9a43aa23c31f808ea2d4650fe94ce58e3
[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" "98ac14eb9d658fee37b5a9a2ed4a64b9a43aa23c31f808ea2d4650fe94ce58e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98ac14eb9d658fee37b5a9a2ed4a64b9a43aa23c31f808ea2d4650fe94ce58e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98ac14eb9d658fee37b5a9a2ed4a64b9a43aa23c31f808ea2d4650fe94ce58e3", kill_on_drop: false }`
[INFO] [stdout] 98ac14eb9d658fee37b5a9a2ed4a64b9a43aa23c31f808ea2d4650fe94ce58e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/jobserver:/tmp/crater-runner-fifo:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "RUSTUP_TOOLCHAIN=3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "-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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/tmp/crater-runner-fifo/jobserver-crater-fwd" "/opt/rustwide/cargo-home/bin/cargo" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3aabd963f083026208287573eaa5624b162503314baf342a197b7742b4634be
[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" "e3aabd963f083026208287573eaa5624b162503314baf342a197b7742b4634be", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling utf8-ranges v1.0.1
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling bindgen v0.36.1
[INFO] [stderr]    Compiling nvpair-sys v0.1.0
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling libloading v0.5.0
[INFO] [stderr]    Compiling clang-sys v0.22.0
[INFO] [stderr]    Compiling textwrap v0.10.0
[INFO] [stderr]    Compiling humantime v1.1.1
[INFO] [stderr]    Compiling proc-macro2 v0.3.5
[INFO] [stderr]    Compiling nom v3.2.1
[INFO] [stderr]    Compiling clap v2.32.0
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling cexpr v0.2.3
[INFO] [stderr]    Compiling aho-corasick v0.6.8
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling libzfs-bindings v0.1.0 (/opt/rustwide/workdir/libzfs-bindings)
[INFO] [stderr]     Checking libzfs-rs v0.1.0 (/opt/rustwide/workdir/libzfs-rs)
[INFO] [stdout] warning: type `Send_zfs_handle_t` should have an upper camel case name
[INFO] [stdout]   --> libzfs-rs/src/lib.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 | struct Send_zfs_handle_t(*mut zfs_handle_t);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `SendZfsHandleT`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:136:20
[INFO] [stdout]     |
[INFO] [stdout] 136 |     stack: Vec<Box<Iterator<Item=ZFSHandle>>>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=ZFSHandle>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:140:24
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn init(roots: Box<Iterator<Item=ZFSHandle>>) -> RecursiveChildren {
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=ZFSHandle>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iterator_thread`
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |         let iterator_thread = std::thread::spawn(move || {
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iterator_thread`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:130:17
[INFO] [stdout]     |
[INFO] [stdout] 130 |             Err(e) => None,
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:106:26
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let (mut sender, mut receiver) = std::sync::mpsc::sync_channel(0);
[INFO] [stdout]     |                          ----^^^^^^^^
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:111:21
[INFO] [stdout]     |
[INFO] [stdout] 110 |                  unsafe extern "C" fn iter_cb(zh: *mut zfs_handle_t, sender_ptr: *mut std::os::raw::c_void) -> i32 {
[INFO] [stdout]     |                  ------------------------------------------------------------------------------------------------- because it's nested under this `unsafe` fn
[INFO] [stdout] 111 |                     unsafe {
[INFO] [stdout]     |                     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `h`
[INFO] [stdout]   --> libzfs-rs/src/lib.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     h: Send_zfs_handle_t,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `init`
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:140:8
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn init(roots: Box<Iterator<Item=ZFSHandle>>) -> RecursiveChildren {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:113:25
[INFO] [stdout]     |
[INFO] [stdout] 113 |                         sender.send(Send_zfs_handle_t(zh));
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Send_zfs_handle_t` should have an upper camel case name
[INFO] [stdout]   --> libzfs-rs/src/lib.rs:90:8
[INFO] [stdout]    |
[INFO] [stdout] 90 | struct Send_zfs_handle_t(*mut zfs_handle_t);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `SendZfsHandleT`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:136:20
[INFO] [stdout]     |
[INFO] [stdout] 136 |     stack: Vec<Box<Iterator<Item=ZFSHandle>>>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=ZFSHandle>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:140:24
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn init(roots: Box<Iterator<Item=ZFSHandle>>) -> RecursiveChildren {
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item=ZFSHandle>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iterator_thread`
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 |         let iterator_thread = std::thread::spawn(move || {
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_iterator_thread`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:130:17
[INFO] [stdout]     |
[INFO] [stdout] 130 |             Err(e) => None,
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `h`
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:174:13
[INFO] [stdout]     |
[INFO] [stdout] 174 |         let h = LibZFSHandle::init();
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_h`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:106:26
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let (mut sender, mut receiver) = std::sync::mpsc::sync_channel(0);
[INFO] [stdout]     |                          ----^^^^^^^^
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `unsafe` block
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:111:21
[INFO] [stdout]     |
[INFO] [stdout] 110 |                  unsafe extern "C" fn iter_cb(zh: *mut zfs_handle_t, sender_ptr: *mut std::os::raw::c_void) -> i32 {
[INFO] [stdout]     |                  ------------------------------------------------------------------------------------------------- because it's nested under this `unsafe` fn
[INFO] [stdout] 111 |                     unsafe {
[INFO] [stdout]     |                     ^^^^^^ unnecessary `unsafe` block
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_unsafe)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `h`
[INFO] [stdout]   --> libzfs-rs/src/lib.rs:96:5
[INFO] [stdout]    |
[INFO] [stdout] 96 |     h: Send_zfs_handle_t,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> libzfs-rs/src/lib.rs:113:25
[INFO] [stdout]     |
[INFO] [stdout] 113 |                         sender.send(Send_zfs_handle_t(zh));
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 09s
[INFO] running `Command { std: "docker" "inspect" "e3aabd963f083026208287573eaa5624b162503314baf342a197b7742b4634be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3aabd963f083026208287573eaa5624b162503314baf342a197b7742b4634be", kill_on_drop: false }`
[INFO] [stdout] e3aabd963f083026208287573eaa5624b162503314baf342a197b7742b4634be