[INFO] fetching crate if_empty 0.3.0...
[INFO] testing if_empty-0.3.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate if_empty 0.3.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate if_empty 0.3.0 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 crates.io crate if_empty 0.3.0
[INFO] finished tweaking crates.io crate if_empty 0.3.0
[INFO] tweaked toml for crates.io crate if_empty 0.3.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate crates.io crate if_empty 0.3.0 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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] c64943db9ef07df18b679db2511c5c0732ffb871132b88a58370d8bcdff2410f
[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" "c64943db9ef07df18b679db2511c5c0732ffb871132b88a58370d8bcdff2410f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c64943db9ef07df18b679db2511c5c0732ffb871132b88a58370d8bcdff2410f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c64943db9ef07df18b679db2511c5c0732ffb871132b88a58370d8bcdff2410f", kill_on_drop: false }`
[INFO] [stdout] c64943db9ef07df18b679db2511c5c0732ffb871132b88a58370d8bcdff2410f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 66e6c4e09fbc63f497a06706cd8cc47ac208ab04fe299eb136402b655c0f4bda
[INFO] running `Command { std: "docker" "start" "-a" "66e6c4e09fbc63f497a06706cd8cc47ac208ab04fe299eb136402b655c0f4bda", kill_on_drop: false }`
[INFO] [stderr]    Compiling if_empty_derive v0.1.0
[INFO] [stderr]    Compiling if_empty v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.30s
[INFO] running `Command { std: "docker" "inspect" "66e6c4e09fbc63f497a06706cd8cc47ac208ab04fe299eb136402b655c0f4bda", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66e6c4e09fbc63f497a06706cd8cc47ac208ab04fe299eb136402b655c0f4bda", kill_on_drop: false }`
[INFO] [stdout] 66e6c4e09fbc63f497a06706cd8cc47ac208ab04fe299eb136402b655c0f4bda
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stdout] b3998be17778f191d985252c02c9c87a78d36c691ffc5f7d5743af8e4721aa1a
[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" "b3998be17778f191d985252c02c9c87a78d36c691ffc5f7d5743af8e4721aa1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling if_empty v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.76s
[INFO] running `Command { std: "docker" "inspect" "b3998be17778f191d985252c02c9c87a78d36c691ffc5f7d5743af8e4721aa1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3998be17778f191d985252c02c9c87a78d36c691ffc5f7d5743af8e4721aa1a", kill_on_drop: false }`
[INFO] [stdout] b3998be17778f191d985252c02c9c87a78d36c691ffc5f7d5743af8e4721aa1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 79aa00c8855550403d1c129799c7533b1e65c8eb257cf250d79f89ef901f0228
[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" "79aa00c8855550403d1c129799c7533b1e65c8eb257cf250d79f89ef901f0228", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] running 6 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/if_empty-37cb9f0bd20125a3)
[INFO] [stdout] test tests::os_string ... ok
[INFO] [stdout] test tests::os_str ... ok
[INFO] [stdout] test tests::derive_macro ... ok
[INFO] [stdout] test tests::custom ... ok
[INFO] [stdout] test tests::string ... ok
[INFO] [stderr]    Doc-tests if_empty
[INFO] [stdout] test tests::str ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 19) ... ok
[INFO] [stdout] test src/lib.rs - (line 59) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.72s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "79aa00c8855550403d1c129799c7533b1e65c8eb257cf250d79f89ef901f0228", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79aa00c8855550403d1c129799c7533b1e65c8eb257cf250d79f89ef901f0228", kill_on_drop: false }`
[INFO] [stdout] 79aa00c8855550403d1c129799c7533b1e65c8eb257cf250d79f89ef901f0228