[INFO] cloning repository https://github.com/bl0rk/rust_learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bl0rk/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbl0rk%2Frust_learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbl0rk%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3fdd98539f4c1f4c2302300e11a5f729495ac77f
[INFO] checking bl0rk/rust_learning against try#9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869 for pr-129249
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbl0rk%2Frust_learning" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bl0rk/rust_learning on toolchain 9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bl0rk/rust_learning
[INFO] finished tweaking git repo https://github.com/bl0rk/rust_learning
[INFO] tweaked toml for git repo https://github.com/bl0rk/rust_learning written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/bl0rk/rust_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e6c5e62dc196b9dbf22f216ffcccc578b4c304be10b1f18324b36310294c751
[INFO] running `Command { std: "docker" "start" "-a" "9e6c5e62dc196b9dbf22f216ffcccc578b4c304be10b1f18324b36310294c751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e6c5e62dc196b9dbf22f216ffcccc578b4c304be10b1f18324b36310294c751", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e6c5e62dc196b9dbf22f216ffcccc578b4c304be10b1f18324b36310294c751", kill_on_drop: false }`
[INFO] [stdout] 9e6c5e62dc196b9dbf22f216ffcccc578b4c304be10b1f18324b36310294c751
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+9543f8ea2aae74b8f13ac2a6e6c0ecdca9810869" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af94fc2e5eaef065cb4a2ac8489c8dc473a4123382698b57abf27d47c0bed995
[INFO] running `Command { std: "docker" "start" "-a" "af94fc2e5eaef065cb4a2ac8489c8dc473a4123382698b57abf27d47c0bed995", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking general_testing v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this conversion is useless `usize` to `usize`
[INFO] [stdout]   --> src/b_tree.rs:65:43
[INFO] [stdout]    |
[INFO] [stdout] 65 |             if (*self.root).keys.len() == (self.order*2-1).into() { 
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `general_testing` (bin "general_testing" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this conversion is useless `usize` to `usize`
[INFO] [stdout]   --> src/b_tree.rs:65:43
[INFO] [stdout]    |
[INFO] [stdout] 65 |             if (*self.root).keys.len() == (self.order*2-1).into() { 
[INFO] [stdout]    |                                           ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `general_testing` (bin "general_testing") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "af94fc2e5eaef065cb4a2ac8489c8dc473a4123382698b57abf27d47c0bed995", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af94fc2e5eaef065cb4a2ac8489c8dc473a4123382698b57abf27d47c0bed995", kill_on_drop: false }`
[INFO] [stdout] af94fc2e5eaef065cb4a2ac8489c8dc473a4123382698b57abf27d47c0bed995