[INFO] fetching crate algorithms-edu 0.2.7...
[INFO] checking algorithms-edu-0.2.7 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate algorithms-edu 0.2.7 into /workspace/builds/worker-89/source
[INFO] validating manifest of crates.io crate algorithms-edu 0.2.7 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate algorithms-edu 0.2.7
[INFO] finished tweaking crates.io crate algorithms-edu 0.2.7
[INFO] tweaked toml for crates.io crate algorithms-edu 0.2.7 written to /workspace/builds/worker-89/source/Cargo.toml
[INFO] crate crates.io crate algorithms-edu 0.2.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ordered-float v2.0.1
[INFO] [stderr]   Downloaded disjoint-sets v0.4.2
[INFO] [stderr]   Downloaded partial-min-max v0.4.0
[INFO] [stderr]   Downloaded kodama v0.2.3
[INFO] [stderr]   Downloaded priority-queue v1.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ae25e881f401af7d2ae09e4ee3e54959d690e0dc10557225a09b0b2853737c6
[INFO] running `Command { std: "docker" "start" "-a" "3ae25e881f401af7d2ae09e4ee3e54959d690e0dc10557225a09b0b2853737c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ae25e881f401af7d2ae09e4ee3e54959d690e0dc10557225a09b0b2853737c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ae25e881f401af7d2ae09e4ee3e54959d690e0dc10557225a09b0b2853737c6", kill_on_drop: false }`
[INFO] [stdout] 3ae25e881f401af7d2ae09e4ee3e54959d690e0dc10557225a09b0b2853737c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3df3510c4bb7688b897636c6f190e151a523e97a5c5cb3a01e5a61b343b8c91d
[INFO] running `Command { std: "docker" "start" "-a" "3df3510c4bb7688b897636c6f190e151a523e97a5c5cb3a01e5a61b343b8c91d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking disjoint-sets v0.4.2
[INFO] [stderr]     Checking partial-min-max v0.4.0
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling priority-queue v1.0.5
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking kodama v0.2.3
[INFO] [stderr]     Checking ordered-float v2.0.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking algorithms-edu v0.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/algo/graph/eulerian_path.rs:81:10
[INFO] [stdout]    |
[INFO] [stdout] 81 |         };
[INFO] [stdout]    |          ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/algo/graph/eulerian_path.rs:81:10
[INFO] [stdout]    |
[INFO] [stdout] 81 |         };
[INFO] [stdout]    |          ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/algo/math/log2.rs:30:27
[INFO] [stdout]    |
[INFO] [stdout] 30 |         assert_eq!(0x10u8.log2(), 4);
[INFO] [stdout]    |                           ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `log2::IntLog2::log2(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(int_log)]` to the crate attributes to enable `core::num::<impl u8>::log2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/algo/math/log2.rs:31:30
[INFO] [stdout]    |
[INFO] [stdout] 31 |         assert_eq!(0x0111u16.log2(), 8);
[INFO] [stdout]    |                              ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `log2::IntLog2::log2(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(int_log)]` to the crate attributes to enable `core::num::<impl u16>::log2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: an associated function with this name may be added to the standard library in the future
[INFO] [stdout]   --> src/algo/math/log2.rs:32:30
[INFO] [stdout]    |
[INFO] [stdout] 32 |         assert_eq!(0x0101i32.log2(), 8);
[INFO] [stdout]    |                              ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = help: call with fully qualified syntax `log2::IntLog2::log2(...)` to keep using the current method
[INFO] [stdout]    = help: add `#![feature(int_log)]` to the crate attributes to enable `core::num::<impl i32>::log2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.59s
[INFO] running `Command { std: "docker" "inspect" "3df3510c4bb7688b897636c6f190e151a523e97a5c5cb3a01e5a61b343b8c91d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3df3510c4bb7688b897636c6f190e151a523e97a5c5cb3a01e5a61b343b8c91d", kill_on_drop: false }`
[INFO] [stdout] 3df3510c4bb7688b897636c6f190e151a523e97a5c5cb3a01e5a61b343b8c91d