[INFO] cloning repository https://github.com/KalikaDakshini/rcalc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KalikaDakshini/rcalc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKalikaDakshini%2Frcalc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKalikaDakshini%2Frcalc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1f2baad9552e3d64f2e654f830cba709b62f4cf5
[INFO] checking KalikaDakshini/rcalc against try#e983148bd5f0f0db270bfb72149f5e892e68b67f for pr-150322
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKalikaDakshini%2Frcalc" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/KalikaDakshini/rcalc
[INFO] finished tweaking git repo https://github.com/KalikaDakshini/rcalc
[INFO] tweaked toml for git repo https://github.com/KalikaDakshini/rcalc written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/KalikaDakshini/rcalc on toolchain e983148bd5f0f0db270bfb72149f5e892e68b67f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/KalikaDakshini/rcalc 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" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking KalikaDakshini/rcalc against try#e983148bd5f0f0db270bfb72149f5e892e68b67f for pr-150322
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKalikaDakshini%2Frcalc" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/KalikaDakshini/rcalc
[INFO] finished tweaking git repo https://github.com/KalikaDakshini/rcalc
[INFO] tweaked toml for git repo https://github.com/KalikaDakshini/rcalc written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/KalikaDakshini/rcalc on toolchain e983148bd5f0f0db270bfb72149f5e892e68b67f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/KalikaDakshini/rcalc 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" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fe909481f791894fadaf9346e8db5f50153999037da50a84b1a868b39f2ca75c
[INFO] running `Command { std: "docker" "start" "-a" "fe909481f791894fadaf9346e8db5f50153999037da50a84b1a868b39f2ca75c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe909481f791894fadaf9346e8db5f50153999037da50a84b1a868b39f2ca75c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe909481f791894fadaf9346e8db5f50153999037da50a84b1a868b39f2ca75c", kill_on_drop: false }`
[INFO] [stdout] fe909481f791894fadaf9346e8db5f50153999037da50a84b1a868b39f2ca75c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+e983148bd5f0f0db270bfb72149f5e892e68b67f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a418e776a1c493a1d048e353eb0adeeec469926f0103d172f2ed14e0716aad9d
[INFO] running `Command { std: "docker" "start" "-a" "a418e776a1c493a1d048e353eb0adeeec469926f0103d172f2ed14e0716aad9d", kill_on_drop: false }`
[INFO] [stderr]     Checking rcalc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/calc/parser.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn lexer(expr: &str) -> Vec<Token> {
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `expr`
[INFO] [stdout]   --> src/calc/parser.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn lexer(expr: &str) -> Vec<Token> {
[INFO] [stdout]    |              ^^^^ help: if this is intentional, prefix it with an underscore: `_expr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Number` and `Operator` are never constructed
[INFO] [stdout]  --> src/calc/parser.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Token<'a> {
[INFO] [stdout]   |          ----- variants in this enum
[INFO] [stdout] 3 |     Number(i32),
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 4 |     Operator(&'a str),
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/calc/parser.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'a> Token<'a> {
[INFO] [stdout]    | ------------------ associated function in this implementation
[INFO] [stdout] 19 |     // Return a new token based on string
[INFO] [stdout] 20 |     fn new(expr: &'a str) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/calc/parser.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<'a> Token<'a> {
[INFO] [stdout]    | ------------------ associated function in this implementation
[INFO] [stdout] 19 |     // Return a new token based on string
[INFO] [stdout] 20 |     fn new(expr: &'a str) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/calc/parser.rs:29:20
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn lexer(expr: &str) -> Vec<Token> {
[INFO] [stdout]    |                    ^^^^         ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn lexer(expr: &str) -> Vec<Token<'_>> {
[INFO] [stdout]    |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/calc/parser.rs:29:20
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn lexer(expr: &str) -> Vec<Token> {
[INFO] [stdout]    |                    ^^^^         ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn lexer(expr: &str) -> Vec<Token<'_>> {
[INFO] [stdout]    |                                      ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "a418e776a1c493a1d048e353eb0adeeec469926f0103d172f2ed14e0716aad9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a418e776a1c493a1d048e353eb0adeeec469926f0103d172f2ed14e0716aad9d", kill_on_drop: false }`
[INFO] [stdout] a418e776a1c493a1d048e353eb0adeeec469926f0103d172f2ed14e0716aad9d