[INFO] fetching crate art-tree 0.2.0...
[INFO] checking art-tree-0.2.0 against master#9610dfe5a9a731ced1ea4923ecbd0c57fe367898 for beta-170-4
[INFO] extracting crate art-tree 0.2.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate art-tree 0.2.0 on toolchain 9610dfe5a9a731ced1ea4923ecbd0c57fe367898
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate art-tree 0.2.0
[INFO] finished tweaking crates.io crate art-tree 0.2.0
[INFO] tweaked toml for crates.io crate art-tree 0.2.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85d62119c6d268384a291b9e563bb13de07ddc70d28ec6c69272f6d47a1e6dfb
[INFO] running `Command { std: "docker" "start" "-a" "85d62119c6d268384a291b9e563bb13de07ddc70d28ec6c69272f6d47a1e6dfb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85d62119c6d268384a291b9e563bb13de07ddc70d28ec6c69272f6d47a1e6dfb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85d62119c6d268384a291b9e563bb13de07ddc70d28ec6c69272f6d47a1e6dfb", kill_on_drop: false }`
[INFO] [stdout] 85d62119c6d268384a291b9e563bb13de07ddc70d28ec6c69272f6d47a1e6dfb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce6619f67b751e08d3b05f378c78efa5b939a09fe5f02c73abe98bde68792c75
[INFO] running `Command { std: "docker" "start" "-a" "ce6619f67b751e08d3b05f378c78efa5b939a09fe5f02c73abe98bde68792c75", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking plotters-backend v0.3.4
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking rayon-core v1.11.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking criterion-plot v0.4.5
[INFO] [stderr]     Checking plotters-svg v0.3.3
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking plotters v0.3.4
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking art-tree v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/node.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 241 |               return Some(val);
[INFO] [stdout]     |               ---------------- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 244 | /         for i in 0..self.keys.len() {
[INFO] [stdout] 245 | |             // find key which uses last cell inside values array
[INFO] [stdout] 246 | |             if self.keys[i] == self.len as u8 {
[INFO] [stdout] 247 | |                 // move value of key which points to last array cell
[INFO] [stdout] ...   |
[INFO] [stdout] 252 | |             }
[INFO] [stdout] 253 | |         }
[INFO] [stdout]     | |_________^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking csv v1.2.2
[INFO] [stdout] warning: the type `[Option<V>; 256]` does not permit being left uninitialized
[INFO] [stdout]    --> src/node.rs:378:22
[INFO] [stdout]     |
[INFO] [stdout] 378 |             unsafe { MaybeUninit::<[Option<V>; 256]>::uninit().assume_init() };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this code causes undefined behavior when executed
[INFO] [stdout]     |                      help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout] note: enums with multiple inhabited variants have to be initialized to a variant
[INFO] [stdout]    --> /rustc/9610dfe5a9a731ced1ea4923ecbd0c57fe367898/library/core/src/option.rs:563:1
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex v1.8.3
[INFO] [stderr]    Compiling serde_derive v1.0.163
[INFO] [stderr]     Checking criterion v0.3.6
[INFO] [stdout] error: couldn't read benches/art_bench.rs: No such file or directory (os error 2)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `art-tree` (bench "art_bench") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/node.rs:244:9
[INFO] [stdout]     |
[INFO] [stdout] 241 |               return Some(val);
[INFO] [stdout]     |               ---------------- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 244 | /         for i in 0..self.keys.len() {
[INFO] [stdout] 245 | |             // find key which uses last cell inside values array
[INFO] [stdout] 246 | |             if self.keys[i] == self.len as u8 {
[INFO] [stdout] 247 | |                 // move value of key which points to last array cell
[INFO] [stdout] ...   |
[INFO] [stdout] 252 | |             }
[INFO] [stdout] 253 | |         }
[INFO] [stdout]     | |_________^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `[Option<V>; 256]` does not permit being left uninitialized
[INFO] [stdout]    --> src/node.rs:378:22
[INFO] [stdout]     |
[INFO] [stdout] 378 |             unsafe { MaybeUninit::<[Option<V>; 256]>::uninit().assume_init() };
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      this code causes undefined behavior when executed
[INFO] [stdout]     |                      help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]     |
[INFO] [stdout] note: enums with multiple inhabited variants have to be initialized to a variant
[INFO] [stdout]    --> /rustc/9610dfe5a9a731ced1ea4923ecbd0c57fe367898/library/core/src/option.rs:563:1
[INFO] [stdout]     = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ce6619f67b751e08d3b05f378c78efa5b939a09fe5f02c73abe98bde68792c75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce6619f67b751e08d3b05f378c78efa5b939a09fe5f02c73abe98bde68792c75", kill_on_drop: false }`
[INFO] [stdout] ce6619f67b751e08d3b05f378c78efa5b939a09fe5f02c73abe98bde68792c75
