[INFO] fetching crate buffer 0.1.9...
[INFO] testing buffer-0.1.9 against 1.55.0 for beta-1.56-1
[INFO] extracting crate buffer 0.1.9 into /workspace/builds/worker-104/source
[INFO] validating manifest of crates.io crate buffer 0.1.9 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate buffer 0.1.9
[INFO] finished tweaking crates.io crate buffer 0.1.9
[INFO] tweaked toml for crates.io crate buffer 0.1.9 written to /workspace/builds/worker-104/source/Cargo.toml
[INFO] crate crates.io crate buffer 0.1.9 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mac v0.0.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 791bc25f0bd37fe161ba11de9fc668de3d2d215f8d56211d3d72d50ec8416874
[INFO] running `Command { std: "docker" "start" "-a" "791bc25f0bd37fe161ba11de9fc668de3d2d215f8d56211d3d72d50ec8416874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "791bc25f0bd37fe161ba11de9fc668de3d2d215f8d56211d3d72d50ec8416874", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "791bc25f0bd37fe161ba11de9fc668de3d2d215f8d56211d3d72d50ec8416874", kill_on_drop: false }`
[INFO] [stdout] 791bc25f0bd37fe161ba11de9fc668de3d2d215f8d56211d3d72d50ec8416874
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54eab7e9910ac57ab3a6dca2203fce214d9eff432efe97326e25ca66b3e97f78
[INFO] running `Command { std: "docker" "start" "-a" "54eab7e9910ac57ab3a6dca2203fce214d9eff432efe97326e25ca66b3e97f78", kill_on_drop: false }`
[INFO] [stderr]    Compiling mac v0.0.2
[INFO] [stderr]    Compiling arrayvec v0.5.2
[INFO] [stderr]    Compiling buffer v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/traits.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let read = try!(reader.read(buf.uninitialized_mut()));
[INFO] [stdout]    |                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `Command { std: "docker" "inspect" "54eab7e9910ac57ab3a6dca2203fce214d9eff432efe97326e25ca66b3e97f78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54eab7e9910ac57ab3a6dca2203fce214d9eff432efe97326e25ca66b3e97f78", kill_on_drop: false }`
[INFO] [stdout] 54eab7e9910ac57ab3a6dca2203fce214d9eff432efe97326e25ca66b3e97f78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2489b17b192a8deb5677add8c15fd477de2a562d05ef14148f643319668daeab
[INFO] running `Command { std: "docker" "start" "-a" "2489b17b192a8deb5677add8c15fd477de2a562d05ef14148f643319668daeab", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling buffer v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/traits.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let read = try!(reader.read(buf.uninitialized_mut()));
[INFO] [stdout]    |                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/traits.rs:15:16
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let read = try!(reader.read(buf.uninitialized_mut()));
[INFO] [stdout]    |                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `Command { std: "docker" "inspect" "2489b17b192a8deb5677add8c15fd477de2a562d05ef14148f643319668daeab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2489b17b192a8deb5677add8c15fd477de2a562d05ef14148f643319668daeab", kill_on_drop: false }`
[INFO] [stdout] 2489b17b192a8deb5677add8c15fd477de2a562d05ef14148f643319668daeab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e665e1f349e8646633c1b0a5e9f226ef27cc01f17fb2fe74e261df5173c31d32
[INFO] running `Command { std: "docker" "start" "-a" "e665e1f349e8646633c1b0a5e9f226ef27cc01f17fb2fe74e261df5173c31d32", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout] running 1 test
[INFO] [stderr]   --> src/traits.rs:15:16
[INFO] [stdout] test impls::buffer_ref::test::buffer_ref_remaining ... ok
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 15 |     let read = try!(reader.read(buf.uninitialized_mut()));
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |                ^^^
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `buffer` (lib) generated 1 warning
[INFO] [stderr] warning: `buffer` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/buffer-6234fb000a861f89)
[INFO] [stderr]    Doc-tests buffer
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e665e1f349e8646633c1b0a5e9f226ef27cc01f17fb2fe74e261df5173c31d32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e665e1f349e8646633c1b0a5e9f226ef27cc01f17fb2fe74e261df5173c31d32", kill_on_drop: false }`
[INFO] [stdout] e665e1f349e8646633c1b0a5e9f226ef27cc01f17fb2fe74e261df5173c31d32