[INFO] fetching crate thincollections 0.5.3...
[INFO] checking thincollections-0.5.3 against try#8b72f65b805cbe4c261de45030d663f524f27376 for pr-78991
[INFO] extracting crate thincollections 0.5.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate thincollections 0.5.3 on toolchain 8b72f65b805cbe4c261de45030d663f524f27376
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate thincollections 0.5.3
[INFO] finished tweaking crates.io crate thincollections 0.5.3
[INFO] tweaked toml for crates.io crate thincollections 0.5.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xoshiro v0.0.4
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ca2a8d625c14b75fc0370816f23cc93b9bd0e1ce8c452dd7c31dff5f1d018e5
[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" "8ca2a8d625c14b75fc0370816f23cc93b9bd0e1ce8c452dd7c31dff5f1d018e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ca2a8d625c14b75fc0370816f23cc93b9bd0e1ce8c452dd7c31dff5f1d018e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ca2a8d625c14b75fc0370816f23cc93b9bd0e1ce8c452dd7c31dff5f1d018e5", kill_on_drop: false }`
[INFO] [stdout] 8ca2a8d625c14b75fc0370816f23cc93b9bd0e1ce8c452dd7c31dff5f1d018e5
[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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+8b72f65b805cbe4c261de45030d663f524f27376" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 316af80c57d7d320f51ab6f1412af73109c482fff3c66874452d65fad21feabf
[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" "316af80c57d7d320f51ab6f1412af73109c482fff3c66874452d65fad21feabf", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking thincollections v0.5.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> src/thin_sentinel.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     #[inline(always)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> src/thin_sentinel.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     #[inline(always)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking xoshiro v0.0.4
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/thin_vec.rs:1244:29
[INFO] [stdout]      |
[INFO] [stdout] 1244 |     pub fn into_boxed_slice(mut self) -> Box<[T]> {
[INFO] [stdout]      |                             ----^^^^
[INFO] [stdout]      |                             |
[INFO] [stdout]      |                             help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ordered-float v1.1.0
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stdout] warning: unused import: `super::ThinSentinel`
[INFO] [stdout]     --> src/thin_map.rs:2135:9
[INFO] [stdout]      |
[INFO] [stdout] 2135 |     use super::ThinSentinel;
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> src/thin_sentinel.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     #[inline(always)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> src/thin_sentinel.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     #[inline(always)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/thin_vec.rs:1244:29
[INFO] [stdout]      |
[INFO] [stdout] 1244 |     pub fn into_boxed_slice(mut self) -> Box<[T]> {
[INFO] [stdout]      |                             ----^^^^
[INFO] [stdout]      |                             |
[INFO] [stdout]      |                             help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.68s
[INFO] running `Command { std: "docker" "inspect" "316af80c57d7d320f51ab6f1412af73109c482fff3c66874452d65fad21feabf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "316af80c57d7d320f51ab6f1412af73109c482fff3c66874452d65fad21feabf", kill_on_drop: false }`
[INFO] [stdout] 316af80c57d7d320f51ab6f1412af73109c482fff3c66874452d65fad21feabf