[INFO] cloning repository https://github.com/badboy/small-step-simple-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/badboy/small-step-simple-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadboy%2Fsmall-step-simple-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadboy%2Fsmall-step-simple-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 31434807da02bff7ef9d5ff8d8af259bd8946ff9
[INFO] checking badboy/small-step-simple-rust against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbadboy%2Fsmall-step-simple-rust" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/badboy/small-step-simple-rust on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/badboy/small-step-simple-rust
[INFO] finished tweaking git repo https://github.com/badboy/small-step-simple-rust
[INFO] tweaked toml for git repo https://github.com/badboy/small-step-simple-rust written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/badboy/small-step-simple-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9bc5cf6220a18ca75af3729850d3a523f8784195386b9f4719e6a6743993fafc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9bc5cf6220a18ca75af3729850d3a523f8784195386b9f4719e6a6743993fafc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9bc5cf6220a18ca75af3729850d3a523f8784195386b9f4719e6a6743993fafc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bc5cf6220a18ca75af3729850d3a523f8784195386b9f4719e6a6743993fafc", kill_on_drop: false }`
[INFO] [stdout] 9bc5cf6220a18ca75af3729850d3a523f8784195386b9f4719e6a6743993fafc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9200d66dc61d8d4fbe14a1f6957f5bcaed40250ca054dab42314550970ce5aaa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9200d66dc61d8d4fbe14a1f6957f5bcaed40250ca054dab42314550970ce5aaa", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking small_step_simple v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:69:1
[INFO] [stdout]    |
[INFO] [stdout] 69 | / macro_rules! number(
[INFO] [stdout] 70 | |     ($val:expr) => (
[INFO] [stdout] 71 | |         box Element::Number($val)
[INFO] [stdout] 72 | |     );
[INFO] [stdout] 73 | | );
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:74:1
[INFO] [stdout]    |
[INFO] [stdout] 74 | / macro_rules! add(
[INFO] [stdout] 75 | |     ($l:expr, $r:expr) => (
[INFO] [stdout] 76 | |         box Element::Add($l, $r)
[INFO] [stdout] 77 | |     )
[INFO] [stdout] 78 | | );
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:79:1
[INFO] [stdout]    |
[INFO] [stdout] 79 | / macro_rules! multiply(
[INFO] [stdout] 80 | |     ($l:expr, $r:expr) => (
[INFO] [stdout] 81 | |         box Element::Multiply($l, $r)
[INFO] [stdout] 82 | |     )
[INFO] [stdout] 83 | | );
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:84:1
[INFO] [stdout]    |
[INFO] [stdout] 84 | / macro_rules! boolean(
[INFO] [stdout] 85 | |     ($val:expr) => (
[INFO] [stdout] 86 | |         box Element::Boolean($val)
[INFO] [stdout] 87 | |     )
[INFO] [stdout] 88 | | );
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:89:1
[INFO] [stdout]    |
[INFO] [stdout] 89 | / macro_rules! less_than(
[INFO] [stdout] 90 | |     ($l:expr, $r:expr) => (
[INFO] [stdout] 91 | |         box Element::LessThan($l, $r)
[INFO] [stdout] 92 | |     )
[INFO] [stdout] 93 | | );
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/lib.rs:94:1
[INFO] [stdout]    |
[INFO] [stdout] 94 | / macro_rules! variable(
[INFO] [stdout] 95 | |     ($v:expr) => (
[INFO] [stdout] 96 | |         box Element::Variable($v.to_string())
[INFO] [stdout] 97 | |     )
[INFO] [stdout] 98 | | );
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/lib.rs:99:1
[INFO] [stdout]     |
[INFO] [stdout] 99  | / macro_rules! assign(
[INFO] [stdout] 100 | |     ($name:expr, $exp:expr) => (
[INFO] [stdout] 101 | |         box Element::Assign($name.to_string(), $exp)
[INFO] [stdout] 102 | |     )
[INFO] [stdout] 103 | | );
[INFO] [stdout]     | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/lib.rs:104:1
[INFO] [stdout]     |
[INFO] [stdout] 104 | / macro_rules! sequence(
[INFO] [stdout] 105 | |     ($first:expr, $second:expr) => (
[INFO] [stdout] 106 | |         box Element::Sequence($first, $second)
[INFO] [stdout] 107 | |     )
[INFO] [stdout] 108 | | );
[INFO] [stdout]     | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/lib.rs:109:1
[INFO] [stdout]     |
[INFO] [stdout] 109 | / macro_rules! ifelse(
[INFO] [stdout] 110 | |     ($condition:expr, $consequence:expr, $alternative:expr) => (
[INFO] [stdout] 111 | |         box Element::IfElse($condition, $consequence, $alternative)
[INFO] [stdout] 112 | |     )
[INFO] [stdout] 113 | | );
[INFO] [stdout]     | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/lib.rs:114:1
[INFO] [stdout]     |
[INFO] [stdout] 114 | / macro_rules! if_(
[INFO] [stdout] 115 | |     ($condition:expr, $consequence:expr) => (
[INFO] [stdout] 116 | |         box Element::IfElse($condition, $consequence, box Element::DoNothing)
[INFO] [stdout] 117 | |     )
[INFO] [stdout] 118 | | );
[INFO] [stdout]     | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]    --> src/lib.rs:119:1
[INFO] [stdout]     |
[INFO] [stdout] 119 | / macro_rules! while_(
[INFO] [stdout] 120 | |     ($condition:expr, $body:expr) => (
[INFO] [stdout] 121 | |         box Element::While($condition, $body)
[INFO] [stdout] 122 | |     )
[INFO] [stdout] 123 | | );
[INFO] [stdout]     | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/lib.rs:435:23
[INFO] [stdout]     |
[INFO] [stdout] 435 |     let ref val = env["x".to_string()];
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       expected reference, found struct `String`
[INFO] [stdout]     |                       help: consider borrowing here: `&"x".to_string()`
[INFO] [stdout]     |
[INFO] [stdout]     = note: expected reference `&_`
[INFO] [stdout]                   found struct `String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `small_step_simple`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "9200d66dc61d8d4fbe14a1f6957f5bcaed40250ca054dab42314550970ce5aaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9200d66dc61d8d4fbe14a1f6957f5bcaed40250ca054dab42314550970ce5aaa", kill_on_drop: false }`
[INFO] [stdout] 9200d66dc61d8d4fbe14a1f6957f5bcaed40250ca054dab42314550970ce5aaa