[INFO] fetching crate envy 0.4.1...
[INFO] testing envy-0.4.1 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate envy 0.4.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate envy 0.4.1 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate envy 0.4.1
[INFO] finished tweaking crates.io crate envy 0.4.1
[INFO] tweaked toml for crates.io crate envy 0.4.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate envy 0.4.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0e013efc1693557c9b0ea28494eeeb613c781a5cc5f091def5a7b7afc36a025
[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" "a0e013efc1693557c9b0ea28494eeeb613c781a5cc5f091def5a7b7afc36a025", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0e013efc1693557c9b0ea28494eeeb613c781a5cc5f091def5a7b7afc36a025", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0e013efc1693557c9b0ea28494eeeb613c781a5cc5f091def5a7b7afc36a025", kill_on_drop: false }`
[INFO] [stdout] a0e013efc1693557c9b0ea28494eeeb613c781a5cc5f091def5a7b7afc36a025
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e1e33bb481ff59508d81a1c7485d97ec62df3ea70ae1d78a5ca7f77f73e559b
[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" "9e1e33bb481ff59508d81a1c7485d97ec62df3ea70ae1d78a5ca7f77f73e559b", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling envy v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.46s
[INFO] running `Command { std: "docker" "inspect" "9e1e33bb481ff59508d81a1c7485d97ec62df3ea70ae1d78a5ca7f77f73e559b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e1e33bb481ff59508d81a1c7485d97ec62df3ea70ae1d78a5ca7f77f73e559b", kill_on_drop: false }`
[INFO] [stdout] 9e1e33bb481ff59508d81a1c7485d97ec62df3ea70ae1d78a5ca7f77f73e559b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 850f0db2cc608361817f0b2345f452794178c18f053b42691ffe59be91af67dd
[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" "850f0db2cc608361817f0b2345f452794178c18f053b42691ffe59be91af67dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling envy v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:75:44
[INFO] [stdout]    |
[INFO] [stdout] 75 |             Error::MissingValue("foo_bar").description(),
[INFO] [stdout]    |                                            ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:79:51
[INFO] [stdout]    |
[INFO] [stdout] 79 |         assert_eq!(Error::Custom("whoops".into()).description(), "custom error")
[INFO] [stdout]    |                                                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.99s
[INFO] running `Command { std: "docker" "inspect" "850f0db2cc608361817f0b2345f452794178c18f053b42691ffe59be91af67dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "850f0db2cc608361817f0b2345f452794178c18f053b42691ffe59be91af67dd", kill_on_drop: false }`
[INFO] [stdout] 850f0db2cc608361817f0b2345f452794178c18f053b42691ffe59be91af67dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 02ab7cb75e1a32346f511bbc5bb670b3d8eb91cb13c04f00127288323e9ad02e
[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" "02ab7cb75e1a32346f511bbc5bb670b3d8eb91cb13c04f00127288323e9ad02e", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:75:44
[INFO] [stderr]    |
[INFO] [stderr] 75 |             Error::MissingValue("foo_bar").description(),
[INFO] [stderr]    |                                            ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:79:51
[INFO] [stderr]    |
[INFO] [stderr] 79 |         assert_eq!(Error::Custom("whoops".into()).description(), "custom error")
[INFO] [stderr]    |                                                   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/envy-282c6c360e82f09e
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test error::tests::error_description ... ok
[INFO] [stdout] test tests::fails_with_invalid_type ... ok
[INFO] [stdout] test tests::deserialize_from_iter ... ok
[INFO] [stdout] test tests::prefixed_strips_prefixes ... ok
[INFO] [stdout] test tests::fails_with_missing_value ... ok
[INFO] [stdout] test error::tests::error_impl_std_error ... ok
[INFO] [stdout] test error::tests::error_display ... ok
[INFO] [stdout] test tests::deserializes_from_prefixed_fieldnames ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests envy
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - prefixed (line 334) ... ok
[INFO] [stdout] test src/lib.rs - (line 37) ... ok
[INFO] [stdout] test src/lib.rs - (line 13) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.80s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "02ab7cb75e1a32346f511bbc5bb670b3d8eb91cb13c04f00127288323e9ad02e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02ab7cb75e1a32346f511bbc5bb670b3d8eb91cb13c04f00127288323e9ad02e", kill_on_drop: false }`
[INFO] [stdout] 02ab7cb75e1a32346f511bbc5bb670b3d8eb91cb13c04f00127288323e9ad02e