[INFO] cloning repository https://github.com/favilo/tiger
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/favilo/tiger" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffavilo%2Ftiger", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffavilo%2Ftiger'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3786a56a2d135983059e655270ac2fba555aab8
[INFO] checking favilo/tiger against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffavilo%2Ftiger" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/favilo/tiger on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/favilo/tiger
[INFO] finished tweaking git repo https://github.com/favilo/tiger
[INFO] tweaked toml for git repo https://github.com/favilo/tiger written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/favilo/tiger already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d583030f185cf25010691e0a845596af1066c409538a9bfdb9aec6c9830aee61
[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" "d583030f185cf25010691e0a845596af1066c409538a9bfdb9aec6c9830aee61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d583030f185cf25010691e0a845596af1066c409538a9bfdb9aec6c9830aee61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d583030f185cf25010691e0a845596af1066c409538a9bfdb9aec6c9830aee61", kill_on_drop: false }`
[INFO] [stdout] d583030f185cf25010691e0a845596af1066c409538a9bfdb9aec6c9830aee61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 07ada33cc15e3416d3c7a9c31a9c556fe88146ee7407ea2d6683a51426bc138f
[INFO] running `Command { std: "docker" "start" "-a" "07ada33cc15e3416d3c7a9c31a9c556fe88146ee7407ea2d6683a51426bc138f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking colored v1.9.2
[INFO] [stderr]     Checking simple_logger v1.5.0
[INFO] [stderr]     Checking tiger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `BufRead`, `BufReader`
[INFO] [stdout]  --> src/main.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 |     io::{prelude::*, BufRead, BufReader},
[INFO] [stdout]   |                      ^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/main.rs:9:27
[INFO] [stdout]   |
[INFO] [stdout] 9 | use lang::{parse_program, ParseError};
[INFO] [stdout]   |                           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `char`, `many1`, `multispace0`
[INFO] [stdout]  --> src/lang.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 4 |     character::complete::{alpha1, char, digit1, multispace0, multispace1},
[INFO] [stdout]   |                                   ^^^^          ^^^^^^^^^^^
[INFO] [stdout] 5 |     combinator::all_consuming,
[INFO] [stdout] 6 |     multi::{many0, many1},
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufRead`, `BufReader`
[INFO] [stdout]  --> src/main.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 |     io::{prelude::*, BufRead, BufReader},
[INFO] [stdout]   |                      ^^^^^^^  ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ParseError`
[INFO] [stdout]  --> src/main.rs:9:27
[INFO] [stdout]   |
[INFO] [stdout] 9 | use lang::{parse_program, ParseError};
[INFO] [stdout]   |                           ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `char`, `many1`, `multispace0`
[INFO] [stdout]  --> src/lang.rs:4:35
[INFO] [stdout]   |
[INFO] [stdout] 4 |     character::complete::{alpha1, char, digit1, multispace0, multispace1},
[INFO] [stdout]   |                                   ^^^^          ^^^^^^^^^^^
[INFO] [stdout] 5 |     combinator::all_consuming,
[INFO] [stdout] 6 |     multi::{many0, many1},
[INFO] [stdout]   |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Plus`
[INFO] [stdout]   --> src/lang.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Plus,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Minus`
[INFO] [stdout]   --> src/lang.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Minus,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Times`
[INFO] [stdout]   --> src/lang.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Times,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Divide`
[INFO] [stdout]   --> src/lang.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Divide,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `InfixOp`
[INFO] [stdout]   --> src/lang.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | /     InfixOp {
[INFO] [stdout] 37 | |         op_type: Op,
[INFO] [stdout] 38 | |         first: Box<Expression>,
[INFO] [stdout] 39 | |         second: Box<Expression>,
[INFO] [stdout] 40 | |     },
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Plus`
[INFO] [stdout]   --> src/lang.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     Plus,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Minus`
[INFO] [stdout]   --> src/lang.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     Minus,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Times`
[INFO] [stdout]   --> src/lang.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     Times,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Divide`
[INFO] [stdout]   --> src/lang.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     Divide,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `InfixOp`
[INFO] [stdout]   --> src/lang.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | /     InfixOp {
[INFO] [stdout] 37 | |         op_type: Op,
[INFO] [stdout] 38 | |         first: Box<Expression>,
[INFO] [stdout] 39 | |         second: Box<Expression>,
[INFO] [stdout] 40 | |     },
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.00s
[INFO] running `Command { std: "docker" "inspect" "07ada33cc15e3416d3c7a9c31a9c556fe88146ee7407ea2d6683a51426bc138f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07ada33cc15e3416d3c7a9c31a9c556fe88146ee7407ea2d6683a51426bc138f", kill_on_drop: false }`
[INFO] [stdout] 07ada33cc15e3416d3c7a9c31a9c556fe88146ee7407ea2d6683a51426bc138f