[INFO] cloning repository https://github.com/amitschang/rusty
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amitschang/rusty" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famitschang%2Frusty", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famitschang%2Frusty'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 12498d2fb410ed0285603ce6a013cdca35152bde
[INFO] building amitschang/rusty against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famitschang%2Frusty" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/amitschang/rusty on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/amitschang/rusty
[INFO] finished tweaking git repo https://github.com/amitschang/rusty
[INFO] tweaked toml for git repo https://github.com/amitschang/rusty written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/amitschang/rusty 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a5026bf0e24eeba99d27d980fcbdcb5dbe86f5a960a9ffa86716b9d265be8dd8
[INFO] running `Command { std: "docker" "start" "-a" "a5026bf0e24eeba99d27d980fcbdcb5dbe86f5a960a9ffa86716b9d265be8dd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5026bf0e24eeba99d27d980fcbdcb5dbe86f5a960a9ffa86716b9d265be8dd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5026bf0e24eeba99d27d980fcbdcb5dbe86f5a960a9ffa86716b9d265be8dd8", kill_on_drop: false }`
[INFO] [stdout] a5026bf0e24eeba99d27d980fcbdcb5dbe86f5a960a9ffa86716b9d265be8dd8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e8913c6570c87c5917c30ea31b7189dacb92ebb02f9ce1e76608d72925cd1dd
[INFO] running `Command { std: "docker" "start" "-a" "4e8913c6570c87c5917c30ea31b7189dacb92ebb02f9ce1e76608d72925cd1dd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rusttest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `BlackJackAgent` is never constructed
[INFO] [stdout]    --> src/rl.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | struct BlackJackAgent {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `select_action`, `update`, `decay_epsilon`, and `play` are never used
[INFO] [stdout]    --> src/rl.rs:137:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | impl BlackJackAgent {
[INFO] [stdout]     | ------------------- associated items in this implementation
[INFO] [stdout] 137 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     fn select_action(&self, state: &BlackJackState) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 162 |     fn update(&mut self, hit: bool, start: &BlackJackState, tx: &Transition) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 192 |     fn decay_epsilon(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 200 |     fn play(&mut self, n_games: i32, train: bool) -> i32 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.86s
[INFO] running `Command { std: "docker" "inspect" "4e8913c6570c87c5917c30ea31b7189dacb92ebb02f9ce1e76608d72925cd1dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e8913c6570c87c5917c30ea31b7189dacb92ebb02f9ce1e76608d72925cd1dd", kill_on_drop: false }`
[INFO] [stdout] 4e8913c6570c87c5917c30ea31b7189dacb92ebb02f9ce1e76608d72925cd1dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 511685b49b261e545267593000194da2a727d6597b5452959aeba1176ee4e3b1
[INFO] running `Command { std: "docker" "start" "-a" "511685b49b261e545267593000194da2a727d6597b5452959aeba1176ee4e3b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusttest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `BlackJackAgent` is never constructed
[INFO] [stdout]    --> src/rl.rs:127:8
[INFO] [stdout]     |
[INFO] [stdout] 127 | struct BlackJackAgent {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `select_action`, `update`, `decay_epsilon`, and `play` are never used
[INFO] [stdout]    --> src/rl.rs:137:8
[INFO] [stdout]     |
[INFO] [stdout] 136 | impl BlackJackAgent {
[INFO] [stdout]     | ------------------- associated items in this implementation
[INFO] [stdout] 137 |     fn new() -> Self {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 148 |     fn select_action(&self, state: &BlackJackState) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 162 |     fn update(&mut self, hit: bool, start: &BlackJackState, tx: &Transition) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 192 |     fn decay_epsilon(&mut self) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 200 |     fn play(&mut self, n_games: i32, train: bool) -> i32 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "511685b49b261e545267593000194da2a727d6597b5452959aeba1176ee4e3b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "511685b49b261e545267593000194da2a727d6597b5452959aeba1176ee4e3b1", kill_on_drop: false }`
[INFO] [stdout] 511685b49b261e545267593000194da2a727d6597b5452959aeba1176ee4e3b1