[INFO] fetching crate rbtag 0.3.0...
[INFO] testing rbtag-0.3.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate rbtag 0.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rbtag 0.3.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rbtag 0.3.0
[INFO] finished tweaking crates.io crate rbtag 0.3.0
[INFO] tweaked toml for crates.io crate rbtag 0.3.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", 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] d51c65a0c50bf0d31940e1e8ae052b0cb34f8b76f6fb1d8c2cbd279b8dfb12ed
[INFO] running `Command { std: "docker" "start" "-a" "d51c65a0c50bf0d31940e1e8ae052b0cb34f8b76f6fb1d8c2cbd279b8dfb12ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d51c65a0c50bf0d31940e1e8ae052b0cb34f8b76f6fb1d8c2cbd279b8dfb12ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d51c65a0c50bf0d31940e1e8ae052b0cb34f8b76f6fb1d8c2cbd279b8dfb12ed", kill_on_drop: false }`
[INFO] [stdout] d51c65a0c50bf0d31940e1e8ae052b0cb34f8b76f6fb1d8c2cbd279b8dfb12ed
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1c48110369bb72594e6d2de2632b53335653fcb933e2bfc2a4a171cdfeb353e
[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" "c1c48110369bb72594e6d2de2632b53335653fcb933e2bfc2a4a171cdfeb353e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rbtag_derive v0.3.0
[INFO] [stderr]    Compiling rbtag v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `Command { std: "docker" "inspect" "c1c48110369bb72594e6d2de2632b53335653fcb933e2bfc2a4a171cdfeb353e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1c48110369bb72594e6d2de2632b53335653fcb933e2bfc2a4a171cdfeb353e", kill_on_drop: false }`
[INFO] [stdout] c1c48110369bb72594e6d2de2632b53335653fcb933e2bfc2a4a171cdfeb353e
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b04139cd771538f91b3292274811ceb8803ceb2c446fb3d8f3c72ee8b2a8832c
[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" "b04139cd771538f91b3292274811ceb8803ceb2c446fb3d8f3c72ee8b2a8832c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rbtag v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "b04139cd771538f91b3292274811ceb8803ceb2c446fb3d8f3c72ee8b2a8832c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b04139cd771538f91b3292274811ceb8803ceb2c446fb3d8f3c72ee8b2a8832c", kill_on_drop: false }`
[INFO] [stdout] b04139cd771538f91b3292274811ceb8803ceb2c446fb3d8f3c72ee8b2a8832c
[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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", 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] 0e36c5ffe51c3c2547b38fa6a19c0a31448d16f110f912be514a4b62070a32b7
[INFO] running `Command { std: "docker" "start" "-a" "0e36c5ffe51c3c2547b38fa6a19c0a31448d16f110f912be514a4b62070a32b7", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rbtag-980d56d4947424e9
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rbtag
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0e36c5ffe51c3c2547b38fa6a19c0a31448d16f110f912be514a4b62070a32b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e36c5ffe51c3c2547b38fa6a19c0a31448d16f110f912be514a4b62070a32b7", kill_on_drop: false }`
[INFO] [stdout] 0e36c5ffe51c3c2547b38fa6a19c0a31448d16f110f912be514a4b62070a32b7