[INFO] fetching crate j-api 0.1.0...
[INFO] testing j-api-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate j-api 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate j-api 0.1.0 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 j-api 0.1.0
[INFO] finished tweaking crates.io crate j-api 0.1.0
[INFO] tweaked toml for crates.io crate j-api 0.1.0 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] [stdout] fa47143290d8f0a8572c87d616cf8c0e7152ff36d65734e1f321f71ab98a42b7
[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" "fa47143290d8f0a8572c87d616cf8c0e7152ff36d65734e1f321f71ab98a42b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa47143290d8f0a8572c87d616cf8c0e7152ff36d65734e1f321f71ab98a42b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa47143290d8f0a8572c87d616cf8c0e7152ff36d65734e1f321f71ab98a42b7", kill_on_drop: false }`
[INFO] [stdout] fa47143290d8f0a8572c87d616cf8c0e7152ff36d65734e1f321f71ab98a42b7
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 88e46701af18311b9840e89fefffba2900e3ff2f52683b3e2be3136e38113141
[INFO] running `Command { std: "docker" "start" "-a" "88e46701af18311b9840e89fefffba2900e3ff2f52683b3e2be3136e38113141", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]    Compiling j-api v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around assigned value
[INFO] [stdout]    --> src/json_api/mod.rs:115:49
[INFO] [stdout]     |
[INFO] [stdout] 115 | const JSON_API_OBJECT: JsonApiObject<'static> = { JsonApiObject { version: "1.0" } };
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` 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 5.22s
[INFO] running `Command { std: "docker" "inspect" "88e46701af18311b9840e89fefffba2900e3ff2f52683b3e2be3136e38113141", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88e46701af18311b9840e89fefffba2900e3ff2f52683b3e2be3136e38113141", kill_on_drop: false }`
[INFO] [stdout] 88e46701af18311b9840e89fefffba2900e3ff2f52683b3e2be3136e38113141
[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] 535cef1448dcab3a6c09a6f9f40af0cfc1713161564d6d1e1c0a4c21ff6ad5b0
[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" "535cef1448dcab3a6c09a6f9f40af0cfc1713161564d6d1e1c0a4c21ff6ad5b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling j-api v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around assigned value
[INFO] [stdout]    --> src/json_api/mod.rs:115:49
[INFO] [stdout]     |
[INFO] [stdout] 115 | const JSON_API_OBJECT: JsonApiObject<'static> = { JsonApiObject { version: "1.0" } };
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around assigned value
[INFO] [stdout]    --> src/json_api/mod.rs:115:49
[INFO] [stdout]     |
[INFO] [stdout] 115 | const JSON_API_OBJECT: JsonApiObject<'static> = { JsonApiObject { version: "1.0" } };
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.74s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "535cef1448dcab3a6c09a6f9f40af0cfc1713161564d6d1e1c0a4c21ff6ad5b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "535cef1448dcab3a6c09a6f9f40af0cfc1713161564d6d1e1c0a4c21ff6ad5b0", kill_on_drop: false }`
[INFO] [stdout] 535cef1448dcab3a6c09a6f9f40af0cfc1713161564d6d1e1c0a4c21ff6ad5b0
[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] [stdout] 2c50ed6e69cd30ac178294aaff3cca01828a763a3ffeee05b29432bd45dc5ba4
[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" "2c50ed6e69cd30ac178294aaff3cca01828a763a3ffeee05b29432bd45dc5ba4", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> src/json_api/mod.rs:115:49
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stderr] 115 | const JSON_API_OBJECT: JsonApiObject<'static> = { JsonApiObject { version: "1.0" } };
[INFO] [stdout] 
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stderr]    --> src/json_api/mod.rs:115:49
[INFO] [stderr]     |
[INFO] [stderr] 115 | const JSON_API_OBJECT: JsonApiObject<'static> = { JsonApiObject { version: "1.0" } };
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.44s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/j_api-bdc8fd989e1c7d63
[INFO] [stderr]    Doc-tests j-api
[INFO] [stderr] warning: unnecessary braces around assigned value
[INFO] [stderr]    --> /opt/rustwide/workdir/src/json_api/mod.rs:115:49
[INFO] [stderr]     |
[INFO] [stderr] 115 | const JSON_API_OBJECT: JsonApiObject<'static> = { JsonApiObject { version: "1.0" } };
[INFO] [stderr]     |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_braces)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[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" "2c50ed6e69cd30ac178294aaff3cca01828a763a3ffeee05b29432bd45dc5ba4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c50ed6e69cd30ac178294aaff3cca01828a763a3ffeee05b29432bd45dc5ba4", kill_on_drop: false }`
[INFO] [stdout] 2c50ed6e69cd30ac178294aaff3cca01828a763a3ffeee05b29432bd45dc5ba4