[INFO] updating cached repository badboy/small-step-simple-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/badboy/small-step-simple-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/badboy/small-step-simple-rust" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/badboy/small-step-simple-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/badboy/small-step-simple-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/badboy/small-step-simple-rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/badboy/small-step-simple-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/badboy/small-step-simple-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 31434807da02bff7ef9d5ff8d8af259bd8946ff9
[INFO] sha for GitHub repo badboy/small-step-simple-rust: 31434807da02bff7ef9d5ff8d8af259bd8946ff9
[INFO] validating manifest of badboy/small-step-simple-rust on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of badboy/small-step-simple-rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing badboy/small-step-simple-rust
[INFO] finished frobbing badboy/small-step-simple-rust
[INFO] frobbed toml for badboy/small-step-simple-rust written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/badboy/small-step-simple-rust/Cargo.toml
[INFO] started frobbing badboy/small-step-simple-rust
[INFO] finished frobbing badboy/small-step-simple-rust
[INFO] frobbed toml for badboy/small-step-simple-rust written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/badboy/small-step-simple-rust/Cargo.toml
[INFO] crate badboy/small-step-simple-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking badboy/small-step-simple-rust against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-0/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/badboy/small-step-simple-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b9294d4a4f78c2c130a8a4291d67888d1987b7a978b44b80209ff4ab5ea5ea79
[INFO] running `"docker" "start" "-a" "b9294d4a4f78c2c130a8a4291d67888d1987b7a978b44b80209ff4ab5ea5ea79"`
[INFO] [stderr]     Checking small_step_simple v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | / macro_rules! number(
[INFO] [stderr] 70 | |     ($val:expr) => (
[INFO] [stderr] 71 | |         box Element::Number($val)
[INFO] [stderr] 72 | |     );
[INFO] [stderr] 73 | | );
[INFO] [stderr]    | |__^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:74:1
[INFO] [stderr]    |
[INFO] [stderr] 74 | / macro_rules! add(
[INFO] [stderr] 75 | |     ($l:expr, $r:expr) => (
[INFO] [stderr] 76 | |         box Element::Add($l, $r)
[INFO] [stderr] 77 | |     )
[INFO] [stderr] 78 | | );
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | / macro_rules! multiply(
[INFO] [stderr] 80 | |     ($l:expr, $r:expr) => (
[INFO] [stderr] 81 | |         box Element::Multiply($l, $r)
[INFO] [stderr] 82 | |     )
[INFO] [stderr] 83 | | );
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:84:1
[INFO] [stderr]    |
[INFO] [stderr] 84 | / macro_rules! boolean(
[INFO] [stderr] 85 | |     ($val:expr) => (
[INFO] [stderr] 86 | |         box Element::Boolean($val)
[INFO] [stderr] 87 | |     )
[INFO] [stderr] 88 | | );
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:89:1
[INFO] [stderr]    |
[INFO] [stderr] 89 | / macro_rules! less_than(
[INFO] [stderr] 90 | |     ($l:expr, $r:expr) => (
[INFO] [stderr] 91 | |         box Element::LessThan($l, $r)
[INFO] [stderr] 92 | |     )
[INFO] [stderr] 93 | | );
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:94:1
[INFO] [stderr]    |
[INFO] [stderr] 94 | / macro_rules! variable(
[INFO] [stderr] 95 | |     ($v:expr) => (
[INFO] [stderr] 96 | |         box Element::Variable($v.to_string())
[INFO] [stderr] 97 | |     )
[INFO] [stderr] 98 | | );
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/lib.rs:99:1
[INFO] [stderr]     |
[INFO] [stderr] 99  | / macro_rules! assign(
[INFO] [stderr] 100 | |     ($name:expr, $exp:expr) => (
[INFO] [stderr] 101 | |         box Element::Assign($name.to_string(), $exp)
[INFO] [stderr] 102 | |     )
[INFO] [stderr] 103 | | );
[INFO] [stderr]     | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/lib.rs:104:1
[INFO] [stderr]     |
[INFO] [stderr] 104 | / macro_rules! sequence(
[INFO] [stderr] 105 | |     ($first:expr, $second:expr) => (
[INFO] [stderr] 106 | |         box Element::Sequence($first, $second)
[INFO] [stderr] 107 | |     )
[INFO] [stderr] 108 | | );
[INFO] [stderr]     | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/lib.rs:109:1
[INFO] [stderr]     |
[INFO] [stderr] 109 | / macro_rules! ifelse(
[INFO] [stderr] 110 | |     ($condition:expr, $consequence:expr, $alternative:expr) => (
[INFO] [stderr] 111 | |         box Element::IfElse($condition, $consequence, $alternative)
[INFO] [stderr] 112 | |     )
[INFO] [stderr] 113 | | );
[INFO] [stderr]     | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/lib.rs:114:1
[INFO] [stderr]     |
[INFO] [stderr] 114 | / macro_rules! if_(
[INFO] [stderr] 115 | |     ($condition:expr, $consequence:expr) => (
[INFO] [stderr] 116 | |         box Element::IfElse($condition, $consequence, box Element::DoNothing)
[INFO] [stderr] 117 | |     )
[INFO] [stderr] 118 | | );
[INFO] [stderr]     | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/lib.rs:119:1
[INFO] [stderr]     |
[INFO] [stderr] 119 | / macro_rules! while_(
[INFO] [stderr] 120 | |     ($condition:expr, $body:expr) => (
[INFO] [stderr] 121 | |         box Element::While($condition, $body)
[INFO] [stderr] 122 | |     )
[INFO] [stderr] 123 | | );
[INFO] [stderr]     | |__^
[INFO] [stderr] 
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]    --> src/lib.rs:435:23
[INFO] [stderr]     |
[INFO] [stderr] 435 |     let ref val = env["x".to_string()];
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^
[INFO] [stderr]     |                       |
[INFO] [stderr]     |                       expected reference, found struct `std::string::String`
[INFO] [stderr]     |                       help: consider borrowing here: `&"x".to_string()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: expected type `&_`
[INFO] [stderr]                found type `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `small_step_simple`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b9294d4a4f78c2c130a8a4291d67888d1987b7a978b44b80209ff4ab5ea5ea79"`
[INFO] running `"docker" "rm" "-f" "b9294d4a4f78c2c130a8a4291d67888d1987b7a978b44b80209ff4ab5ea5ea79"`
[INFO] [stdout] b9294d4a4f78c2c130a8a4291d67888d1987b7a978b44b80209ff4ab5ea5ea79