[INFO] cloning repository https://github.com/snproj/string_tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/snproj/string_tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsnproj%2Fstring_tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsnproj%2Fstring_tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e0d027841bb690851e8e4164d4023ff19747ac61
[INFO] testing snproj/string_tree against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsnproj%2Fstring_tree" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/snproj/string_tree on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/snproj/string_tree
[INFO] finished tweaking git repo https://github.com/snproj/string_tree
[INFO] tweaked toml for git repo https://github.com/snproj/string_tree written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/snproj/string_tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb5b019a2f2e7f39ee073c1089a1869eef1a296daa61d55f3a09425ba93b745e
[INFO] running `Command { std: "docker" "start" "-a" "cb5b019a2f2e7f39ee073c1089a1869eef1a296daa61d55f3a09425ba93b745e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb5b019a2f2e7f39ee073c1089a1869eef1a296daa61d55f3a09425ba93b745e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb5b019a2f2e7f39ee073c1089a1869eef1a296daa61d55f3a09425ba93b745e", kill_on_drop: false }`
[INFO] [stdout] cb5b019a2f2e7f39ee073c1089a1869eef1a296daa61d55f3a09425ba93b745e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fb9af33b5d63d5c84da8f40edeecb0c9197653f4fb7fd504b11bb1a144906b60
[INFO] running `Command { std: "docker" "start" "-a" "fb9af33b5d63d5c84da8f40edeecb0c9197653f4fb7fd504b11bb1a144906b60", kill_on_drop: false }`
[INFO] [stderr]    Compiling string_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `dict`
[INFO] [stdout]    --> src/word_actionator.rs:168:57
[INFO] [stdout]     |
[INFO] [stdout] 168 |     fn commence_action(&self, target: Arc<Mutex<VSON>>, dict: Arc<Mutex<T>>) -> Option<Arc<Mutex<WordActionResult>>>{
[INFO] [stdout]     |                                                         ^^^^ help: if this is intentional, prefix it with an underscore: `_dict`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pprint`
[INFO] [stdout]   --> src/traverser.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn pprint(thing: &VSON, tab_count: usize) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pprint_store`
[INFO] [stdout]    --> src/traverser.rs:121:12
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub fn pprint_store(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pprint_store_ptr`
[INFO] [stdout]    --> src/traverser.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub fn pprint_store_ptr(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.06s
[INFO] running `Command { std: "docker" "inspect" "fb9af33b5d63d5c84da8f40edeecb0c9197653f4fb7fd504b11bb1a144906b60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb9af33b5d63d5c84da8f40edeecb0c9197653f4fb7fd504b11bb1a144906b60", kill_on_drop: false }`
[INFO] [stdout] fb9af33b5d63d5c84da8f40edeecb0c9197653f4fb7fd504b11bb1a144906b60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe9679937cb22188354fc77e7cb95c33f24cd8e9d87b01844ebf4990796954c3
[INFO] running `Command { std: "docker" "start" "-a" "fe9679937cb22188354fc77e7cb95c33f24cd8e9d87b01844ebf4990796954c3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling string_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `dict`
[INFO] [stdout]    --> src/word_actionator.rs:168:57
[INFO] [stdout]     |
[INFO] [stdout] 168 |     fn commence_action(&self, target: Arc<Mutex<VSON>>, dict: Arc<Mutex<T>>) -> Option<Arc<Mutex<WordActionResult>>>{
[INFO] [stdout]     |                                                         ^^^^ help: if this is intentional, prefix it with an underscore: `_dict`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pprint`
[INFO] [stdout]   --> src/traverser.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn pprint(thing: &VSON, tab_count: usize) {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pprint_store`
[INFO] [stdout]    --> src/traverser.rs:121:12
[INFO] [stdout]     |
[INFO] [stdout] 121 |     pub fn pprint_store(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pprint_store_ptr`
[INFO] [stdout]    --> src/traverser.rs:125:12
[INFO] [stdout]     |
[INFO] [stdout] 125 |     pub fn pprint_store_ptr(&self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "fe9679937cb22188354fc77e7cb95c33f24cd8e9d87b01844ebf4990796954c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe9679937cb22188354fc77e7cb95c33f24cd8e9d87b01844ebf4990796954c3", kill_on_drop: false }`
[INFO] [stdout] fe9679937cb22188354fc77e7cb95c33f24cd8e9d87b01844ebf4990796954c3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 726bb32f51f8bbcf385a2d02a24e06407061caf4fd06893d892d71d1475537aa
[INFO] running `Command { std: "docker" "start" "-a" "726bb32f51f8bbcf385a2d02a24e06407061caf4fd06893d892d71d1475537aa", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `dict`
[INFO] [stdout] running 0 tests
[INFO] [stderr]    --> src/word_actionator.rs:168:57
[INFO] [stdout] 
[INFO] [stderr]     |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 168 |     fn commence_action(&self, target: Arc<Mutex<VSON>>, dict: Arc<Mutex<T>>) -> Option<Arc<Mutex<WordActionResult>>>{
[INFO] [stdout] 
[INFO] [stderr]     |                                                         ^^^^ help: if this is intentional, prefix it with an underscore: `_dict`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pprint`
[INFO] [stderr]   --> src/traverser.rs:55:12
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn pprint(thing: &VSON, tab_count: usize) {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pprint_store`
[INFO] [stderr]    --> src/traverser.rs:121:12
[INFO] [stderr]     |
[INFO] [stderr] 121 |     pub fn pprint_store(&self) {
[INFO] [stderr]     |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `pprint_store_ptr`
[INFO] [stderr]    --> src/traverser.rs:125:12
[INFO] [stderr]     |
[INFO] [stderr] 125 |     pub fn pprint_store_ptr(&self) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `string_tree` (bin "string_tree" test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/string_tree-83aeeb5ef82ecff1)
[INFO] running `Command { std: "docker" "inspect" "726bb32f51f8bbcf385a2d02a24e06407061caf4fd06893d892d71d1475537aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "726bb32f51f8bbcf385a2d02a24e06407061caf4fd06893d892d71d1475537aa", kill_on_drop: false }`
[INFO] [stdout] 726bb32f51f8bbcf385a2d02a24e06407061caf4fd06893d892d71d1475537aa