[INFO] fetching crate scuttlebutt 0.2.0...
[INFO] checking scuttlebutt-0.2.0 against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] extracting crate scuttlebutt 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate scuttlebutt 0.2.0 on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scuttlebutt 0.2.0
[INFO] finished tweaking crates.io crate scuttlebutt 0.2.0
[INFO] tweaked toml for crates.io crate scuttlebutt 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded language-tags v0.2.2
[INFO] [stderr]   Downloaded safemem v0.3.3
[INFO] [stderr]   Downloaded num-traits v0.1.43
[INFO] [stderr]   Downloaded itoa v0.3.4
[INFO] [stderr]   Downloaded kernel32-sys v0.2.2
[INFO] [stderr]   Downloaded matches v0.1.8
[INFO] [stderr]   Downloaded quote v0.3.15
[INFO] [stderr]   Downloaded typeable v0.1.2
[INFO] [stderr]   Downloaded rustc-serialize v0.3.24
[INFO] [stderr]   Downloaded bitflags v0.7.0
[INFO] [stderr]   Downloaded traitobject v0.1.0
[INFO] [stderr]   Downloaded version_check v0.1.5
[INFO] [stderr]   Downloaded unicase v1.4.2
[INFO] [stderr]   Downloaded base64 v0.9.3
[INFO] [stderr]   Downloaded unicode-bidi v0.3.5
[INFO] [stderr]   Downloaded tinyvec_macros v0.1.0
[INFO] [stderr]   Downloaded time v0.1.44
[INFO] [stderr]   Downloaded hermit-abi v0.1.18
[INFO] [stderr]   Downloaded wasi v0.10.0+wasi-snapshot-preview1
[INFO] [stderr]   Downloaded httparse v1.4.0
[INFO] [stderr]   Downloaded libc v0.2.93
[INFO] [stderr]   Downloaded url v1.7.2
[INFO] [stderr]   Downloaded log v0.3.9
[INFO] [stderr]   Downloaded percent-encoding v1.0.1
[INFO] [stderr]   Downloaded serde_codegen_internals v0.14.2
[INFO] [stderr]   Downloaded syntex_syntax v0.54.0
[INFO] [stderr]   Downloaded dtoa v0.4.8
[INFO] [stderr]   Downloaded serde_codegen v0.8.23
[INFO] [stderr]   Downloaded winapi v0.2.8
[INFO] [stderr]   Downloaded tinyvec v1.2.0
[INFO] [stderr]   Downloaded winapi v0.3.9
[INFO] [stderr]   Downloaded serde_codegen_internals v0.11.3
[INFO] [stderr]   Downloaded term v0.4.6
[INFO] [stderr]   Downloaded serde_derive v0.9.15
[INFO] [stderr]   Downloaded idna v0.1.5
[INFO] [stderr]   Downloaded log v0.4.14
[INFO] [stderr]   Downloaded unicode-normalization v0.1.17
[INFO] [stderr]   Downloaded cfg-if v1.0.0
[INFO] [stderr]   Downloaded hyper v0.10.16
[INFO] [stderr]   Downloaded syntex v0.54.0
[INFO] [stderr]   Downloaded serde v0.9.15
[INFO] [stderr]   Downloaded syntex_errors v0.54.0
[INFO] [stderr]   Downloaded synom v0.11.3
[INFO] [stderr]   Downloaded syntex_pos v0.54.0
[INFO] [stderr]   Downloaded unicode-xid v0.0.4
[INFO] [stderr]   Downloaded serde_json v0.9.10
[INFO] [stderr]   Downloaded mime v0.2.6
[INFO] [stderr]   Downloaded syn v0.11.11
[INFO] [stderr]   Downloaded winapi-build v0.1.1
[INFO] [stderr]   Downloaded syn v0.10.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c101b9d54a0968ea3362bb9c434a4d4ef5b4bfd3c7872cf1f2d47c999ae94d6c
[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" "c101b9d54a0968ea3362bb9c434a4d4ef5b4bfd3c7872cf1f2d47c999ae94d6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c101b9d54a0968ea3362bb9c434a4d4ef5b4bfd3c7872cf1f2d47c999ae94d6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c101b9d54a0968ea3362bb9c434a4d4ef5b4bfd3c7872cf1f2d47c999ae94d6c", kill_on_drop: false }`
[INFO] [stdout] c101b9d54a0968ea3362bb9c434a4d4ef5b4bfd3c7872cf1f2d47c999ae94d6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42b0455ee18cce0e21e352449c54d2855fdd4cc6fb7d9cc466d40bd016e331dc
[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" "42b0455ee18cce0e21e352449c54d2855fdd4cc6fb7d9cc466d40bd016e331dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling serde_derive v0.9.15
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking serde_json v0.9.10
[INFO] [stderr]     Checking scuttlebutt v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:228:19
[INFO] [stdout]     |
[INFO] [stdout] 228 |         let res = try!(
[INFO] [stdout]     |                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:228:19
[INFO] [stdout]     |
[INFO] [stdout] 228 |         let res = try!(
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.17s
[INFO] running `Command { std: "docker" "inspect" "42b0455ee18cce0e21e352449c54d2855fdd4cc6fb7d9cc466d40bd016e331dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42b0455ee18cce0e21e352449c54d2855fdd4cc6fb7d9cc466d40bd016e331dc", kill_on_drop: false }`
[INFO] [stdout] 42b0455ee18cce0e21e352449c54d2855fdd4cc6fb7d9cc466d40bd016e331dc