[INFO] cloning repository https://github.com/jtempest/rust_book_exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jtempest/rust_book_exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtempest%2Frust_book_exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtempest%2Frust_book_exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23b10de80673adaee05523125cf3695738c31e09
[INFO] testing jtempest/rust_book_exercises against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjtempest%2Frust_book_exercises" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jtempest/rust_book_exercises on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jtempest/rust_book_exercises
[INFO] finished tweaking git repo https://github.com/jtempest/rust_book_exercises
[INFO] tweaked toml for git repo https://github.com/jtempest/rust_book_exercises written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/jtempest/rust_book_exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fcff7a5083e6c7c853d8ed6ca6a0ba07ce9bb2cddebe9863ea1b4efb98928c94
[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" "fcff7a5083e6c7c853d8ed6ca6a0ba07ce9bb2cddebe9863ea1b4efb98928c94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcff7a5083e6c7c853d8ed6ca6a0ba07ce9bb2cddebe9863ea1b4efb98928c94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcff7a5083e6c7c853d8ed6ca6a0ba07ce9bb2cddebe9863ea1b4efb98928c94", kill_on_drop: false }`
[INFO] [stdout] fcff7a5083e6c7c853d8ed6ca6a0ba07ce9bb2cddebe9863ea1b4efb98928c94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a73c2578d0ae367cfd301fdb49d00685d13bd1a8401115b7e0255015d3431e4
[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" "1a73c2578d0ae367cfd301fdb49d00685d13bd1a8401115b7e0255015d3431e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling regex-syntax v0.6.17
[INFO] [stderr]    Compiling webserver v0.1.0 (/opt/rustwide/workdir/webserver)
[INFO] [stderr]    Compiling twelve_days v0.1.0 (/opt/rustwide/workdir/twelve_days)
[INFO] [stderr]    Compiling two_threads v0.1.0 (/opt/rustwide/workdir/threads)
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling pig_latin v0.1.0 (/opt/rustwide/workdir/pig_latin)
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling regex v1.3.6
[INFO] [stderr]    Compiling guessing v0.1.0 (/opt/rustwide/workdir/guessing)
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling averages v0.1.0 (/opt/rustwide/workdir/averages)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.13s
[INFO] running `Command { std: "docker" "inspect" "1a73c2578d0ae367cfd301fdb49d00685d13bd1a8401115b7e0255015d3431e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a73c2578d0ae367cfd301fdb49d00685d13bd1a8401115b7e0255015d3431e4", kill_on_drop: false }`
[INFO] [stdout] 1a73c2578d0ae367cfd301fdb49d00685d13bd1a8401115b7e0255015d3431e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--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] a2d730da77f6ec64947845832d2e93a874f7a91307860a54c0a1573900993114
[INFO] running `Command { std: "docker" "start" "-a" "a2d730da77f6ec64947845832d2e93a874f7a91307860a54c0a1573900993114", kill_on_drop: false }`
[INFO] [stderr]    Compiling webserver v0.1.0 (/opt/rustwide/workdir/webserver)
[INFO] [stderr]    Compiling two_threads v0.1.0 (/opt/rustwide/workdir/threads)
[INFO] [stderr]    Compiling twelve_days v0.1.0 (/opt/rustwide/workdir/twelve_days)
[INFO] [stderr]    Compiling pig_latin v0.1.0 (/opt/rustwide/workdir/pig_latin)
[INFO] [stderr]    Compiling guessing v0.1.0 (/opt/rustwide/workdir/guessing)
[INFO] [stderr]    Compiling averages v0.1.0 (/opt/rustwide/workdir/averages)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.51s
[INFO] running `Command { std: "docker" "inspect" "a2d730da77f6ec64947845832d2e93a874f7a91307860a54c0a1573900993114", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2d730da77f6ec64947845832d2e93a874f7a91307860a54c0a1573900993114", kill_on_drop: false }`
[INFO] [stdout] a2d730da77f6ec64947845832d2e93a874f7a91307860a54c0a1573900993114
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7c53ff71eb87edbeac1440967d4bd05b613ee4e6157d258aa8f0c953ac218ea9
[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" "7c53ff71eb87edbeac1440967d4bd05b613ee4e6157d258aa8f0c953ac218ea9", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] running 4 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/averages-48671c72121d4b01)
[INFO] [stdout] test test_mean ... ok
[INFO] [stdout] test test_parity_cmp ... ok
[INFO] [stdout] test test_mode ... ok
[INFO] [stdout] test test_median ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/guessing-618d077d02b07c65)
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/pig_latin-dd928fe9a78b17a8)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/twelve_days-475dd65f625d7c60)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/two_threads-030e54f5dd863b34)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/webserver-68bce7e82474a72e)
[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 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/main-f88efc7f0ce95d1c)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests webserver
[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 0.00s
[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; finished in 0.00s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7c53ff71eb87edbeac1440967d4bd05b613ee4e6157d258aa8f0c953ac218ea9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c53ff71eb87edbeac1440967d4bd05b613ee4e6157d258aa8f0c953ac218ea9", kill_on_drop: false }`
[INFO] [stdout] 7c53ff71eb87edbeac1440967d4bd05b613ee4e6157d258aa8f0c953ac218ea9