[INFO] cloning repository https://github.com/chad-russell/seam
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chad-russell/seam" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchad-russell%2Fseam", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchad-russell%2Fseam'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 177abf0e17689ba5a0340ddb7f3346779a74feef
[INFO] testing chad-russell/seam against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchad-russell%2Fseam" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chad-russell/seam on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chad-russell/seam
[INFO] finished tweaking git repo https://github.com/chad-russell/seam
[INFO] tweaked toml for git repo https://github.com/chad-russell/seam written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/chad-russell/seam already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51e3b1255ca3f7f4667a158df8d648d32a2624cdaabef712889ff243ec045ac6
[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" "51e3b1255ca3f7f4667a158df8d648d32a2624cdaabef712889ff243ec045ac6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51e3b1255ca3f7f4667a158df8d648d32a2624cdaabef712889ff243ec045ac6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51e3b1255ca3f7f4667a158df8d648d32a2624cdaabef712889ff243ec045ac6", kill_on_drop: false }`
[INFO] [stdout] 51e3b1255ca3f7f4667a158df8d648d32a2624cdaabef712889ff243ec045ac6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "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] b9f49f4646da9f8f1403f41d9aac46ae3fe08d7650d187b6c9f7e8f1824ca878
[INFO] running `Command { std: "docker" "start" "-a" "b9f49f4646da9f8f1403f41d9aac46ae3fe08d7650d187b6c9f7e8f1824ca878", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cranelift-entity v0.76.0
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.76.0
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling target-lexicon v0.12.1
[INFO] [stderr]    Compiling anyhow v1.0.32
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling ahash v0.3.8
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling libloading v0.7.0
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling regalloc v0.0.31
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.76.0
[INFO] [stderr]    Compiling cranelift-bforest v0.76.0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling region v2.2.0
[INFO] [stderr]    Compiling gimli v0.25.0
[INFO] [stderr]    Compiling object v0.26.0
[INFO] [stderr]    Compiling string-interner v0.12.0
[INFO] [stderr]    Compiling cranelift-codegen v0.76.0
[INFO] [stderr]    Compiling cranelift-module v0.76.0
[INFO] [stderr]    Compiling cranelift-native v0.76.0
[INFO] [stderr]    Compiling cranelift-frontend v0.76.0
[INFO] [stderr]    Compiling cranelift v0.76.0
[INFO] [stderr]    Compiling cranelift-jit v0.76.0
[INFO] [stderr]    Compiling cranelift-object v0.76.0
[INFO] [stderr]    Compiling seam v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/backend.rs:1637:17
[INFO] [stdout]      |
[INFO] [stdout] 1637 |                 self.handle_defers(id);
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/backend.rs:2395:29
[INFO] [stdout]      |
[INFO] [stdout] 2395 | ...                   self.handle_defers(id);
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/backend.rs:2421:29
[INFO] [stdout]      |
[INFO] [stdout] 2421 | ...                   self.handle_defers(id);
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/backend.rs:2470:25
[INFO] [stdout]      |
[INFO] [stdout] 2470 |                         self.handle_defers(id);
[INFO] [stdout]      |                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 56s
[INFO] running `Command { std: "docker" "inspect" "b9f49f4646da9f8f1403f41d9aac46ae3fe08d7650d187b6c9f7e8f1824ca878", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9f49f4646da9f8f1403f41d9aac46ae3fe08d7650d187b6c9f7e8f1824ca878", kill_on_drop: false }`
[INFO] [stdout] b9f49f4646da9f8f1403f41d9aac46ae3fe08d7650d187b6c9f7e8f1824ca878
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 254d04dd8520dc50bfd16ba49aba3c01a4603c489e3d202a90aa4790448dd26e
[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" "254d04dd8520dc50bfd16ba49aba3c01a4603c489e3d202a90aa4790448dd26e", kill_on_drop: false }`
[INFO] [stderr]    Compiling seam v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/backend.rs:1637:17
[INFO] [stdout]      |
[INFO] [stdout] 1637 |                 self.handle_defers(id);
[INFO] [stdout]      |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/backend.rs:2395:29
[INFO] [stdout]      |
[INFO] [stdout] 2395 | ...                   self.handle_defers(id);
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/backend.rs:2421:29
[INFO] [stdout]      |
[INFO] [stdout] 2421 | ...                   self.handle_defers(id);
[INFO] [stdout]      |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/backend.rs:2470:25
[INFO] [stdout]      |
[INFO] [stdout] 2470 |                         self.handle_defers(id);
[INFO] [stdout]      |                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.68s
[INFO] running `Command { std: "docker" "inspect" "254d04dd8520dc50bfd16ba49aba3c01a4603c489e3d202a90aa4790448dd26e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "254d04dd8520dc50bfd16ba49aba3c01a4603c489e3d202a90aa4790448dd26e", kill_on_drop: false }`
[INFO] [stdout] 254d04dd8520dc50bfd16ba49aba3c01a4603c489e3d202a90aa4790448dd26e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 05802945307f17f786c652da60aef22d552e94cad38a81119528ed2e5db62869
[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" "05802945307f17f786c652da60aef22d552e94cad38a81119528ed2e5db62869", kill_on_drop: false }`
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/backend.rs:1637:17
[INFO] [stderr]      |
[INFO] [stderr] 1637 |                 self.handle_defers(id);
[INFO] [stderr]      |                 ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/backend.rs:2395:29
[INFO] [stderr]      |
[INFO] [stderr] 2395 | ...                   self.handle_defers(id);
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/backend.rs:2421:29
[INFO] [stderr]      |
[INFO] [stderr] 2421 | ...                   self.handle_defers(id);
[INFO] [stderr]      |                       ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/backend.rs:2470:25
[INFO] [stderr]      |
[INFO] [stderr] 2470 |                         self.handle_defers(id);
[INFO] [stderr]      |                         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: `seam` (bin "seam" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/seam-a0afc150a4230a5c)
[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" "05802945307f17f786c652da60aef22d552e94cad38a81119528ed2e5db62869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05802945307f17f786c652da60aef22d552e94cad38a81119528ed2e5db62869", kill_on_drop: false }`
[INFO] [stdout] 05802945307f17f786c652da60aef22d552e94cad38a81119528ed2e5db62869