[INFO] fetching crate hamster_wheel 0.2.1...
[INFO] testing hamster_wheel-0.2.1 against 1.47.0 for beta-1.48-1
[INFO] extracting crate hamster_wheel 0.2.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate hamster_wheel 0.2.1 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hamster_wheel 0.2.1
[INFO] finished tweaking crates.io crate hamster_wheel 0.2.1
[INFO] tweaked toml for crates.io crate hamster_wheel 0.2.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c29e8029bef60691a4c2a1a986e1369eb0092e6f695aecfe5984196b3d4c4141
[INFO] running `Command { std: "docker" "start" "-a" "c29e8029bef60691a4c2a1a986e1369eb0092e6f695aecfe5984196b3d4c4141", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c29e8029bef60691a4c2a1a986e1369eb0092e6f695aecfe5984196b3d4c4141", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c29e8029bef60691a4c2a1a986e1369eb0092e6f695aecfe5984196b3d4c4141", kill_on_drop: false }`
[INFO] [stdout] c29e8029bef60691a4c2a1a986e1369eb0092e6f695aecfe5984196b3d4c4141
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 87ac13f3cd819da6b0702ebd2658e26c022235c5f92904ac9fd92b9bea1ba46f
[INFO] running `Command { std: "docker" "start" "-a" "87ac13f3cd819da6b0702ebd2658e26c022235c5f92904ac9fd92b9bea1ba46f", kill_on_drop: false }`
[INFO] [stderr]    Compiling beef v0.4.4
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]    Compiling try_from v0.3.2
[INFO] [stderr]    Compiling regex v1.4.1
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling flate2 v1.0.18
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling bstr v0.2.13
[INFO] [stderr]    Compiling logos-derive v0.10.0
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling publicsuffix v1.5.4
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling csv v1.1.3
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]    Compiling logos v0.10.0
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling reqwest v0.9.24
[INFO] [stderr]    Compiling hamster_wheel v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/interpreter/importer.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let mut joined;
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.67s
[INFO] running `Command { std: "docker" "inspect" "87ac13f3cd819da6b0702ebd2658e26c022235c5f92904ac9fd92b9bea1ba46f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87ac13f3cd819da6b0702ebd2658e26c022235c5f92904ac9fd92b9bea1ba46f", kill_on_drop: false }`
[INFO] [stdout] 87ac13f3cd819da6b0702ebd2658e26c022235c5f92904ac9fd92b9bea1ba46f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc450c67ef4c515b42a3f5f21335b37915e754e2b0afd33d5c8d55ae06fe78d7
[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" "cc450c67ef4c515b42a3f5f21335b37915e754e2b0afd33d5c8d55ae06fe78d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling hamster_wheel v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/interpreter/importer.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let mut joined;
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/interpreter/importer.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let mut joined;
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.24s
[INFO] running `Command { std: "docker" "inspect" "cc450c67ef4c515b42a3f5f21335b37915e754e2b0afd33d5c8d55ae06fe78d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc450c67ef4c515b42a3f5f21335b37915e754e2b0afd33d5c8d55ae06fe78d7", kill_on_drop: false }`
[INFO] [stdout] cc450c67ef4c515b42a3f5f21335b37915e754e2b0afd33d5c8d55ae06fe78d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f0e6d287849cb1561239e7c5dd4d82f030980c1fb25e77164beaafd9d04889f1
[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" "f0e6d287849cb1561239e7c5dd4d82f030980c1fb25e77164beaafd9d04889f1", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/interpreter/importer.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let mut joined;
[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: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/interpreter/importer.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |         let mut joined;
[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: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.26s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/hamster_wheel-d1d584bdd7faaae1
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tokenizer::tokenizer::tests::peek_checks_next_token ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/hamster_wheel-bc4e66ff7ef5acd8
[INFO] [stdout] test tokenizer::tokenizer::tests::eof_peek ... ok
[INFO] [stdout] test tokenizer::tokenizer::tests::multiple_peeks ... ok
[INFO] [stdout] test tokenizer::tokenizer::tests::peek_after_advance ... ok
[INFO] [stdout] test tokenizer::tokenizer::tests::two_peeks_after_advance ... ok
[INFO] [stdout] test tokenizer::tokenizer::tests::peek_preserves_current_info ... ok
[INFO] [stdout] test tokenizer::tokenizer::tests::peeks_and_advances ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hamster_wheel
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f0e6d287849cb1561239e7c5dd4d82f030980c1fb25e77164beaafd9d04889f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0e6d287849cb1561239e7c5dd4d82f030980c1fb25e77164beaafd9d04889f1", kill_on_drop: false }`
[INFO] [stdout] f0e6d287849cb1561239e7c5dd4d82f030980c1fb25e77164beaafd9d04889f1
