[INFO] cloning repository https://github.com/altaurog/rust-traits
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/altaurog/rust-traits" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faltaurog%2Frust-traits", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faltaurog%2Frust-traits'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9ded725f0236127cbb1cce3c2765c8c9d03f1b25
[INFO] checking altaurog/rust-traits against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faltaurog%2Frust-traits" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/altaurog/rust-traits on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/altaurog/rust-traits
[INFO] finished tweaking git repo https://github.com/altaurog/rust-traits
[INFO] tweaked toml for git repo https://github.com/altaurog/rust-traits written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/altaurog/rust-traits already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded peg-macros v0.7.0
[INFO] [stderr]   Downloaded peg v0.7.0
[INFO] [stderr]   Downloaded peg-runtime v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 705137e4f10b5c46e879e3ba23d50dfddbd1a4c6cf7aef78bd215e3c0f3a4237
[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" "705137e4f10b5c46e879e3ba23d50dfddbd1a4c6cf7aef78bd215e3c0f3a4237", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "705137e4f10b5c46e879e3ba23d50dfddbd1a4c6cf7aef78bd215e3c0f3a4237", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "705137e4f10b5c46e879e3ba23d50dfddbd1a4c6cf7aef78bd215e3c0f3a4237", kill_on_drop: false }`
[INFO] [stdout] 705137e4f10b5c46e879e3ba23d50dfddbd1a4c6cf7aef78bd215e3c0f3a4237
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bb9bcfa20564b155cb0b7a03d1565e467feb01810e8429ab5e719bf9b3995549
[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" "bb9bcfa20564b155cb0b7a03d1565e467feb01810e8429ab5e719bf9b3995549", 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]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling peg-runtime v0.7.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling peg-macros v0.7.0
[INFO] [stderr]     Checking peg v0.7.0
[INFO] [stderr]     Checking typeclasses v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `eval`
[INFO] [stdout]   --> src/eval.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn eval(expr: ExprT) -> i32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `eval_str`
[INFO] [stdout]   --> src/parse.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub fn eval_str(input: String) -> Option<i32> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_exp`
[INFO] [stdout]   --> src/parse.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn parse_exp<T: Expr>(input: String) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `exprt_to_expr`
[INFO] [stdout]   --> src/parse.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn exprt_to_expr<T: Expr>(exprt: ExprT) -> T {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `IVal`
[INFO] [stdout]  --> src/stackvm.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     IVal(i32),
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BVal`
[INFO] [stdout]  --> src/stackvm.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     BVal(bool),
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Void`
[INFO] [stdout]  --> src/stackvm.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     Void,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Stack`
[INFO] [stdout]   --> src/stackvm.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub type Stack = VecDeque<StackVal>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `stackvm`
[INFO] [stdout]   --> src/stackvm.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn stackvm<'a>(program: Program) -> Result<StackVal, String> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `err_type`
[INFO] [stdout]   --> src/stackvm.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn err_type<'a, T>(op: &str) -> Result<T, String> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `err_underflow`
[INFO] [stdout]   --> src/stackvm.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn err_underflow<'a, T>(op: &str) -> Result<T, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `execute`
[INFO] [stdout]   --> src/stackvm.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn execute<'a>(stack: Stack, program: Program) -> Result<StackVal, String> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compile`
[INFO] [stdout]   --> src/program.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub fn compile(expr: String) -> Option<Program> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.34s
[INFO] running `Command { std: "docker" "inspect" "bb9bcfa20564b155cb0b7a03d1565e467feb01810e8429ab5e719bf9b3995549", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb9bcfa20564b155cb0b7a03d1565e467feb01810e8429ab5e719bf9b3995549", kill_on_drop: false }`
[INFO] [stdout] bb9bcfa20564b155cb0b7a03d1565e467feb01810e8429ab5e719bf9b3995549