[INFO] crate zmq-rs 0.1.8 is already in cache
[INFO] checking zmq-rs-0.1.8 against master#4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb for pr-64672
[INFO] extracting crate zmq-rs 0.1.8 into work/builds/worker-4/source
[INFO] validating manifest of crates.io crate zmq-rs 0.1.8 on toolchain 4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate zmq-rs 0.1.8
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate zmq-rs 0.1.8
[INFO] tweaked toml for crates.io crate zmq-rs 0.1.8 written to work/builds/worker-4/source/Cargo.toml
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1f2f649b4556a74d76667a2967e3d3ab930bc984c707bca1a76fd551f29c3c30
[INFO] running `"docker" "start" "-a" "1f2f649b4556a74d76667a2967e3d3ab930bc984c707bca1a76fd551f29c3c30"`
[INFO] [stderr]    Compiling zmq-ffi v0.1.3
[INFO] [stderr]     Checking zmq-rs v0.1.8 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/socket.rs:389:23
[INFO] [stderr]     |
[INFO] [stderr] 389 |         let mut msg = try!(Message::new());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/socket.rs:400:19
[INFO] [stderr]     |
[INFO] [stderr] 400 |         let msg = try!(Message::from_slice(data));
[INFO] [stderr]     |                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:331:27
[INFO] [stderr]     |
[INFO] [stderr] 331 |             let mut msg = try!(Message::with_capcity(data.len()));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/socket.rs:389:23
[INFO] [stderr]     |
[INFO] [stderr] 389 |         let mut msg = try!(Message::new());
[INFO] [stderr]     |                       ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/socket.rs:400:19
[INFO] [stderr]     |
[INFO] [stderr] 400 |         let msg = try!(Message::from_slice(data));
[INFO] [stderr]     |                   ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:331:27
[INFO] [stderr]     |
[INFO] [stderr] 331 |             let mut msg = try!(Message::with_capcity(data.len()));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> examples/zguide/hwserver.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut context = zmq::Context::new().unwrap();
[INFO] [stderr]   |         ----^^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::option::Option::<T>::is_some` that must be used
[INFO] [stderr]   --> tests/lib.rs:72:5
[INFO] [stderr]    |
[INFO] [stderr] 72 |     empty.get_meta("Socket-Type").is_some();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you intended to assert that this has a value, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::option::Option::<T>::is_some` that must be used
[INFO] [stderr]   --> tests/lib.rs:73:5
[INFO] [stderr]    |
[INFO] [stderr] 73 |     empty.get_meta("Identity").is_some();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you intended to assert that this has a value, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::option::Option::<T>::is_some` that must be used
[INFO] [stderr]   --> tests/lib.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     empty.get_meta("Resource").is_some();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you intended to assert that this has a value, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.40s
[INFO] running `"docker" "inspect" "1f2f649b4556a74d76667a2967e3d3ab930bc984c707bca1a76fd551f29c3c30"`
[INFO] running `"docker" "rm" "-f" "1f2f649b4556a74d76667a2967e3d3ab930bc984c707bca1a76fd551f29c3c30"`
[INFO] [stdout] 1f2f649b4556a74d76667a2967e3d3ab930bc984c707bca1a76fd551f29c3c30