[INFO] cloning repository https://github.com/briheet/LRU
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/briheet/LRU" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbriheet%2FLRU", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbriheet%2FLRU'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 24ef8a7a679c003a098e99f61f47893f41cc428a
[INFO] testing briheet/LRU against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbriheet%2FLRU" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/briheet/LRU
[INFO] finished tweaking git repo https://github.com/briheet/LRU
[INFO] tweaked toml for git repo https://github.com/briheet/LRU written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/briheet/LRU on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/briheet/LRU 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb0864f80f4a41185bc21f5a867d62d04455140730a00be9ec5b63bd457f81a3
[INFO] running `Command { std: "docker" "start" "-a" "eb0864f80f4a41185bc21f5a867d62d04455140730a00be9ec5b63bd457f81a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb0864f80f4a41185bc21f5a867d62d04455140730a00be9ec5b63bd457f81a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb0864f80f4a41185bc21f5a867d62d04455140730a00be9ec5b63bd457f81a3", kill_on_drop: false }`
[INFO] [stdout] eb0864f80f4a41185bc21f5a867d62d04455140730a00be9ec5b63bd457f81a3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b7c97b35aed22533c06bc8ceadc91c5a262721048c13a3df43f62f7941600aa
[INFO] running `Command { std: "docker" "start" "-a" "3b7c97b35aed22533c06bc8ceadc91c5a262721048c13a3df43f62f7941600aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.7.4
[INFO] [stderr]    Compiling LRU v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `num::NonZero`
[INFO] [stdout]   --> src/main.rs:10:26
[INFO] [stdout]    |
[INFO] [stdout] 10 | use core::{mem::replace, num::NonZero}; // Replaces the previous with the new with its reference to the old memory
[INFO] [stdout]    |                          ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: `#[panic_handler]` function required, but not found
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unwinding panics are not supported without std
[INFO] [stdout]   |
[INFO] [stdout]   = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding
[INFO] [stdout]   = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `LRU` (bin "LRU") due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "3b7c97b35aed22533c06bc8ceadc91c5a262721048c13a3df43f62f7941600aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b7c97b35aed22533c06bc8ceadc91c5a262721048c13a3df43f62f7941600aa", kill_on_drop: false }`
[INFO] [stdout] 3b7c97b35aed22533c06bc8ceadc91c5a262721048c13a3df43f62f7941600aa