[INFO] fetching crate backoff 0.4.0...
[INFO] checking backoff-0.4.0 against try#e61be1c89a2b3fd02452eef3c6186592711e4772 for pr-98456
[INFO] extracting crate backoff 0.4.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate backoff 0.4.0 on toolchain e61be1c89a2b3fd02452eef3c6186592711e4772
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e61be1c89a2b3fd02452eef3c6186592711e4772" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate backoff 0.4.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate backoff 0.4.0
[INFO] tweaked toml for crates.io crate backoff 0.4.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate backoff 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e61be1c89a2b3fd02452eef3c6186592711e4772" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+e61be1c89a2b3fd02452eef3c6186592711e4772" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 849dcbb13bb6ccd96abfa00a26938d68727fec34c668d56af3aef99165c42971
[INFO] running `Command { std: "docker" "start" "-a" "849dcbb13bb6ccd96abfa00a26938d68727fec34c668d56af3aef99165c42971", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "849dcbb13bb6ccd96abfa00a26938d68727fec34c668d56af3aef99165c42971", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "849dcbb13bb6ccd96abfa00a26938d68727fec34c668d56af3aef99165c42971", kill_on_drop: false }`
[INFO] [stdout] 849dcbb13bb6ccd96abfa00a26938d68727fec34c668d56af3aef99165c42971
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+e61be1c89a2b3fd02452eef3c6186592711e4772" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9996db3688b55ae3e37461b20bf5655de01f1140e0cd558f293b29efac1b8025
[INFO] running `Command { std: "docker" "start" "-a" "9996db3688b55ae3e37461b20bf5655de01f1140e0cd558f293b29efac1b8025", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
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[INFO] [stderr]    Compiling libc v0.2.84
[INFO] [stderr]    Compiling autocfg v1.0.1
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[INFO] [stderr]     Checking futures-io v0.3.12
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
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[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]    Compiling openssl v0.10.32
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[INFO] [stderr]     Checking http-body v0.4.0
[INFO] [stderr]     Checking url v2.2.0
[INFO] [stderr]     Checking backoff v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-executor v0.3.12
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]    Compiling ctor v0.1.18
[INFO] [stderr]    Compiling tokio-macros v1.0.0
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[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking mio v0.7.7
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking pin-project v1.0.4
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking tracing-futures v0.2.4
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[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/exponential.rs:69:11
[INFO] [stdout]    |
[INFO] [stdout] 69 |         ..ExponentialBackoff::default()
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `C` declared on the struct `ExponentialBackoff`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `backoff` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9996db3688b55ae3e37461b20bf5655de01f1140e0cd558f293b29efac1b8025", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9996db3688b55ae3e37461b20bf5655de01f1140e0cd558f293b29efac1b8025", kill_on_drop: false }`
[INFO] [stdout] 9996db3688b55ae3e37461b20bf5655de01f1140e0cd558f293b29efac1b8025