[INFO] fetching crate serde_tuple 0.5.0... [INFO] checking serde_tuple-0.5.0 against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819 [INFO] extracting crate serde_tuple 0.5.0 into /workspace/builds/worker-0/source [INFO] validating manifest of crates.io crate serde_tuple 0.5.0 on toolchain 4a04890980766cc79878135f5ade8c0c4321e943 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate serde_tuple 0.5.0 [INFO] finished tweaking crates.io crate serde_tuple 0.5.0 [INFO] tweaked toml for crates.io crate serde_tuple 0.5.0 written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate crates.io crate serde_tuple 0.5.0 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded serde_derive v1.0.92 [INFO] [stderr] Downloaded syn v0.15.36 [INFO] [stderr] Downloaded serde_tuple_macros v0.5.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e794b1c7c26e967904c12a8aa5455ef90c393ca9dc437618ad203bc4420deea8 [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" "e794b1c7c26e967904c12a8aa5455ef90c393ca9dc437618ad203bc4420deea8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e794b1c7c26e967904c12a8aa5455ef90c393ca9dc437618ad203bc4420deea8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e794b1c7c26e967904c12a8aa5455ef90c393ca9dc437618ad203bc4420deea8", kill_on_drop: false }` [INFO] [stdout] e794b1c7c26e967904c12a8aa5455ef90c393ca9dc437618ad203bc4420deea8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 056e483b85cc76a54c6464712fa506abf897c780fb252713c527aef72f1d93b0 [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" "056e483b85cc76a54c6464712fa506abf897c780fb252713c527aef72f1d93b0", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling proc-macro2 v1.0.7 [INFO] [stderr] Compiling syn v0.15.36 [INFO] [stderr] Compiling unicode-xid v0.2.0 [INFO] [stderr] Compiling syn v1.0.13 [INFO] [stderr] Compiling serde v1.0.92 [INFO] [stderr] Compiling ryu v0.2.8 [INFO] [stderr] Checking itoa v0.4.4 [INFO] [stderr] Compiling quote v1.0.2 [INFO] [stderr] Compiling quote v0.6.12 [INFO] [stderr] Compiling serde_derive v1.0.92 [INFO] [stderr] Compiling serde_tuple_macros v0.5.0 [INFO] [stderr] Checking serde_json v1.0.39 [INFO] [stderr] Checking serde_tuple v0.5.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::borrow::Cow` [INFO] [stdout] --> examples/simple.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::borrow::Cow; [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Ok` [INFO] [stdout] --> examples/simple.rs:23:8 [INFO] [stdout] | [INFO] [stdout] 23 | struct Ok; [INFO] [stdout] | ^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 36.05s [INFO] running `Command { std: "docker" "inspect" "056e483b85cc76a54c6464712fa506abf897c780fb252713c527aef72f1d93b0", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "056e483b85cc76a54c6464712fa506abf897c780fb252713c527aef72f1d93b0", kill_on_drop: false }` [INFO] [stdout] 056e483b85cc76a54c6464712fa506abf897c780fb252713c527aef72f1d93b0