[INFO] fetching crate functiontrace-server 0.4.0...
[INFO] testing functiontrace-server-0.4.0 against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] extracting crate functiontrace-server 0.4.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate functiontrace-server 0.4.0 on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate functiontrace-server 0.4.0
[INFO] finished tweaking crates.io crate functiontrace-server 0.4.0
[INFO] tweaked toml for crates.io crate functiontrace-server 0.4.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate functiontrace-server 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded argh_shared v0.1.4
[INFO] [stderr]   Downloaded paste v1.0.4
[INFO] [stderr]   Downloaded mio v0.7.6
[INFO] [stderr]   Downloaded argh_derive v0.1.4
[INFO] [stderr]   Downloaded bytesize v1.0.1
[INFO] [stderr]   Downloaded argh v0.1.4
[INFO] [stderr]   Downloaded serde_repr v0.1.6
[INFO] [stderr]   Downloaded env_logger v0.8.2
[INFO] [stderr]   Downloaded rmp-serde v0.15.0
[INFO] [stderr]   Downloaded rmp v0.8.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b1819bb207f05c570aaadc53435a7e5fb80d8c4a03e24f8ce690d8ecb72d98a
[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" "2b1819bb207f05c570aaadc53435a7e5fb80d8c4a03e24f8ce690d8ecb72d98a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b1819bb207f05c570aaadc53435a7e5fb80d8c4a03e24f8ce690d8ecb72d98a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b1819bb207f05c570aaadc53435a7e5fb80d8c4a03e24f8ce690d8ecb72d98a", kill_on_drop: false }`
[INFO] [stdout] 2b1819bb207f05c570aaadc53435a7e5fb80d8c4a03e24f8ce690d8ecb72d98a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "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] befe396af845e1f67c875e188b30ec2500490d9540fe829cd9b770efa387be4b
[INFO] running `Command { std: "docker" "start" "-a" "befe396af845e1f67c875e188b30ec2500490d9540fe829cd9b770efa387be4b", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.56
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.60
[INFO] [stderr]    Compiling argh_shared v0.1.4
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling paste v1.0.4
[INFO] [stderr]    Compiling bytesize v1.0.1
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling mio v0.7.6
[INFO] [stderr]    Compiling env_logger v0.8.2
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling crossbeam-queue v0.3.1
[INFO] [stderr]    Compiling rmp v0.8.9
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling argh_derive v0.1.4
[INFO] [stderr]    Compiling serde_repr v0.1.6
[INFO] [stderr]    Compiling argh v0.1.4
[INFO] [stderr]    Compiling rmp-serde v0.15.0
[INFO] [stderr]    Compiling functiontrace-server v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `GarbageCollection`
[INFO] [stdout]   --> src/profile_generator.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     GarbageCollection,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 58.23s
[INFO] running `Command { std: "docker" "inspect" "befe396af845e1f67c875e188b30ec2500490d9540fe829cd9b770efa387be4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "befe396af845e1f67c875e188b30ec2500490d9540fe829cd9b770efa387be4b", kill_on_drop: false }`
[INFO] [stdout] befe396af845e1f67c875e188b30ec2500490d9540fe829cd9b770efa387be4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 703cbfdde74e8635629516c3712050657874fab9f30f388abe569b4831f2e4ae
[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" "703cbfdde74e8635629516c3712050657874fab9f30f388abe569b4831f2e4ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling functiontrace-server v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `GarbageCollection`
[INFO] [stdout]   --> src/profile_generator.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     GarbageCollection,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `GarbageCollection`
[INFO] [stdout]   --> src/profile_generator.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     GarbageCollection,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.89s
[INFO] running `Command { std: "docker" "inspect" "703cbfdde74e8635629516c3712050657874fab9f30f388abe569b4831f2e4ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "703cbfdde74e8635629516c3712050657874fab9f30f388abe569b4831f2e4ae", kill_on_drop: false }`
[INFO] [stdout] 703cbfdde74e8635629516c3712050657874fab9f30f388abe569b4831f2e4ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 947467e9a2d6ecc870ca4e337cd1acbbca9fcf201823e24493535c6fa063e66e
[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" "947467e9a2d6ecc870ca4e337cd1acbbca9fcf201823e24493535c6fa063e66e", kill_on_drop: false }`
[INFO] [stderr] warning: variant is never constructed: `GarbageCollection`
[INFO] [stderr]   --> src/profile_generator.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     GarbageCollection,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `functiontrace-server` (lib) generated 1 warning
[INFO] [stderr] warning: `functiontrace-server` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/functiontrace_server-5a0453dba1e63485)
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/functiontrace_server-8ae7937e7b8374d4)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests functiontrace-server
[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" "947467e9a2d6ecc870ca4e337cd1acbbca9fcf201823e24493535c6fa063e66e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "947467e9a2d6ecc870ca4e337cd1acbbca9fcf201823e24493535c6fa063e66e", kill_on_drop: false }`
[INFO] [stdout] 947467e9a2d6ecc870ca4e337cd1acbbca9fcf201823e24493535c6fa063e66e