[INFO] fetching crate art-tree 0.2.0...
[INFO] testing art-tree-0.2.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate art-tree 0.2.0 into /workspace/builds/worker-81/source
[INFO] validating manifest of crates.io crate art-tree 0.2.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-81/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07fc365df6401fd08d53fb9e0c35922df838b9cb072263b2d57b2393fc7efbb5
[INFO] running `Command { std: "docker" "start" "-a" "07fc365df6401fd08d53fb9e0c35922df838b9cb072263b2d57b2393fc7efbb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07fc365df6401fd08d53fb9e0c35922df838b9cb072263b2d57b2393fc7efbb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07fc365df6401fd08d53fb9e0c35922df838b9cb072263b2d57b2393fc7efbb5", kill_on_drop: false }`
[INFO] [stdout] 07fc365df6401fd08d53fb9e0c35922df838b9cb072263b2d57b2393fc7efbb5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d32c208ff1d5cb96f6396253601beef636e7da51b281439b7cbe80f7ba23164
[INFO] running `Command { std: "docker" "start" "-a" "2d32c208ff1d5cb96f6396253601beef636e7da51b281439b7cbe80f7ba23164", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.55s
[INFO] running `Command { std: "docker" "inspect" "2d32c208ff1d5cb96f6396253601beef636e7da51b281439b7cbe80f7ba23164", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d32c208ff1d5cb96f6396253601beef636e7da51b281439b7cbe80f7ba23164", kill_on_drop: false }`
[INFO] [stdout] 2d32c208ff1d5cb96f6396253601beef636e7da51b281439b7cbe80f7ba23164
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2663c9ef9dcc1605d8d831006bc08d08253e1b20b83895cb28394dfce11036e
[INFO] running `Command { std: "docker" "start" "-a" "f2663c9ef9dcc1605d8d831006bc08d08253e1b20b83895cb28394dfce11036e", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling semver v1.0.7
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling plotters-backend v0.3.2
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling half v1.8.2
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling oorandom v11.1.3
[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]    Compiling memoffset v0.6.5
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling plotters-svg v0.3.1
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling regex v1.5.5
[INFO] [stderr]    Compiling criterion-plot v0.4.4
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling criterion v0.3.5
[INFO] [stderr]    Compiling 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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 59.38s
[INFO] running `Command { std: "docker" "inspect" "f2663c9ef9dcc1605d8d831006bc08d08253e1b20b83895cb28394dfce11036e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2663c9ef9dcc1605d8d831006bc08d08253e1b20b83895cb28394dfce11036e", kill_on_drop: false }`
[INFO] [stdout] f2663c9ef9dcc1605d8d831006bc08d08253e1b20b83895cb28394dfce11036e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 102359c5f18e6420012315c627860365d1eecaa2f233232c9d5b3361c3d16c4f
[INFO] running `Command { std: "docker" "start" "-a" "102359c5f18e6420012315c627860365d1eecaa2f233232c9d5b3361c3d16c4f", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/node.rs:244:9
[INFO] [stderr]     |
[INFO] [stderr] 241 |               return Some(val);
[INFO] [stderr]     |               ---------------- any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 244 | /         for i in 0..self.keys.len() {
[INFO] [stderr] 245 | |             // find key which uses last cell inside values array
[INFO] [stderr] 246 | |             if self.keys[i] == self.len as u8 {
[INFO] [stderr] 247 | |                 // move value of key which points to last array cell
[INFO] [stderr] ...   |
[INFO] [stderr] 252 | |             }
[INFO] [stderr] 253 | |         }
[INFO] [stderr]     | |_________^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `art-tree` (lib) generated 1 warning
[INFO] [stderr] warning: `art-tree` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/art_tree-e68f971ba2bd3157)
[INFO] [stdout] 
[INFO] [stdout] running 44 tests
[INFO] [stdout] test node::tests::node48 ... ok
[INFO] [stdout] test node::tests::node256 ... ok
[INFO] [stdout] test node::tests::flat_node ... ok
[INFO] [stdout] test scanner::tests::double_ended_iter ... ok
[INFO] [stdout] test scanner::tests::range_scan_on_sequential_f64_keys ... ok
[INFO] [stdout] test scanner::tests::iter_with_long_prefix ... ok
[INFO] [stdout] test scanner::tests::range_scan_on_sequential_f32_keys ... ok
[INFO] [stdout] test scanner::tests::seq_u8 ... ok
[INFO] [stdout] test tests::seq_insert_f32 ... ok
[INFO] [stdout] test tests::seq_insert_f64 ... ok
[INFO] [stdout] test tests::seq_insert_i8 ... ok
[INFO] [stdout] test tests::seq_remove_i8 ... ok
[INFO] [stdout] test tests::seq_insert_u8 ... ok
[INFO] [stdout] test tests::seq_remove_u8 ... ok
[INFO] [stdout] test tests::insert_with_long_prefix ... ok
[INFO] [stdout] test scanner::tests::range_scan_with_long_prefix ... ok
[INFO] [stdout] test scanner::tests::range_scan_on_sequential_u32_keys ... ok
[INFO] [stdout] test tests::upsert ... ok
[INFO] [stdout] test tests::seq_remove_u32 ... ok
[INFO] [stdout] test tests::seq_insert_u32 ... ok
[INFO] [stdout] test tests::seq_remove_i32 ... ok
[INFO] [stdout] test tests::seq_insert_i32 ... ok
[INFO] [stdout] test scanner::tests::seq_u16 ... ok
[INFO] [stdout] test tests::seq_insert_i16 ... ok
[INFO] [stdout] test tests::seq_remove_u128 ... ok
[INFO] [stdout] test tests::seq_remove_i64 ... ok
[INFO] [stdout] test tests::seq_remove_u16 ... ok
[INFO] [stdout] test tests::seq_remove_i16 ... ok
[INFO] [stdout] test tests::seq_insert_u16 ... ok
[INFO] [stdout] test scanner::tests::combined_keys ... ok
[INFO] [stdout] test tests::seq_insert_u128 ... ok
[INFO] [stdout] test tests::mixed_upsert_and_delete ... ok
[INFO] [stdout] test tests::seq_insert_combined_key ... ok
[INFO] [stdout] test tests::seq_insert_i64 ... ok
[INFO] [stdout] test tests::seq_remove_combined_key ... ok
[INFO] [stdout] test scanner::tests::double_ended_iter_seq_keys ... ok
[INFO] [stdout] test tests::seq_remove_i128 ... ok
[INFO] [stdout] test tests::seq_insert_i128 ... ok
[INFO] [stdout] test scanner::tests::range_scan_on_sequential_u64_keys ... ok
[INFO] [stdout] test tests::remove_with_long_prefix ... ok
[INFO] [stdout] test tests::seq_insert_u64 ... ok
[INFO] [stdout] test tests::existed_elements_cannot_be_inserted ... ok
[INFO] [stdout] test tests::seq_remove_u64 ... ok
[INFO] [stdout] test tests::modifications_with_seq_keys_with_increasing_size ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 44 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 42.27s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests art-tree
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/keys.rs - keys::KeyBuilder (line 257) ... ok
[INFO] [stdout] test src/keys.rs - keys::KeyBuilder (line 263) ... ok
[INFO] [stdout] test src/lib.rs - (line 6) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.58s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "102359c5f18e6420012315c627860365d1eecaa2f233232c9d5b3361c3d16c4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "102359c5f18e6420012315c627860365d1eecaa2f233232c9d5b3361c3d16c4f", kill_on_drop: false }`
[INFO] [stdout] 102359c5f18e6420012315c627860365d1eecaa2f233232c9d5b3361c3d16c4f