[INFO] fetching crate exponential-backoff 1.1.0...
[INFO] testing exponential-backoff-1.1.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate exponential-backoff 1.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate exponential-backoff 1.1.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exponential-backoff 1.1.0
[INFO] finished tweaking crates.io crate exponential-backoff 1.1.0
[INFO] tweaked toml for crates.io crate exponential-backoff 1.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5bde4fe6b97d7f6d959ddadb079cb1ca8bc50a0d0e2131327176bfb0bb4fff2f
[INFO] running `Command { std: "docker" "start" "-a" "5bde4fe6b97d7f6d959ddadb079cb1ca8bc50a0d0e2131327176bfb0bb4fff2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5bde4fe6b97d7f6d959ddadb079cb1ca8bc50a0d0e2131327176bfb0bb4fff2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bde4fe6b97d7f6d959ddadb079cb1ca8bc50a0d0e2131327176bfb0bb4fff2f", kill_on_drop: false }`
[INFO] [stdout] 5bde4fe6b97d7f6d959ddadb079cb1ca8bc50a0d0e2131327176bfb0bb4fff2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3dab61e6f1376ca518dd97695b9b6a0232254d9eac681cad7743d85d78b4407
[INFO] running `Command { std: "docker" "start" "-a" "a3dab61e6f1376ca518dd97695b9b6a0232254d9eac681cad7743d85d78b4407", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling exponential-backoff v1.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.19s
[INFO] running `Command { std: "docker" "inspect" "a3dab61e6f1376ca518dd97695b9b6a0232254d9eac681cad7743d85d78b4407", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3dab61e6f1376ca518dd97695b9b6a0232254d9eac681cad7743d85d78b4407", kill_on_drop: false }`
[INFO] [stdout] a3dab61e6f1376ca518dd97695b9b6a0232254d9eac681cad7743d85d78b4407
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 730bb015d374c52c605be9a13961e90e30740a01ff77a97adbd628c4071da72c
[INFO] running `Command { std: "docker" "start" "-a" "730bb015d374c52c605be9a13961e90e30740a01ff77a97adbd628c4071da72c", kill_on_drop: false }`
[INFO] [stderr]    Compiling exponential-backoff v1.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "730bb015d374c52c605be9a13961e90e30740a01ff77a97adbd628c4071da72c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "730bb015d374c52c605be9a13961e90e30740a01ff77a97adbd628c4071da72c", kill_on_drop: false }`
[INFO] [stdout] 730bb015d374c52c605be9a13961e90e30740a01ff77a97adbd628c4071da72c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5dc59dfa6d61a24964c7e0a1858b9e416e99c270f2685fb79397ebdd08a17d29
[INFO] running `Command { std: "docker" "start" "-a" "5dc59dfa6d61a24964c7e0a1858b9e416e99c270f2685fb79397ebdd08a17d29", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.43s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/exponential_backoff-c99566e5568947c2)
[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 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/test.rs (/opt/rustwide/target/debug/deps/test-8a6599877e39f759)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test doesnt_crash ... ok
[INFO] [stdout] test iterator_completes ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.09s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests exponential-backoff
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 17) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.35s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5dc59dfa6d61a24964c7e0a1858b9e416e99c270f2685fb79397ebdd08a17d29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dc59dfa6d61a24964c7e0a1858b9e416e99c270f2685fb79397ebdd08a17d29", kill_on_drop: false }`
[INFO] [stdout] 5dc59dfa6d61a24964c7e0a1858b9e416e99c270f2685fb79397ebdd08a17d29