[INFO] cloning repository https://github.com/vladborsh/rs-calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vladborsh/rs-calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvladborsh%2Frs-calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvladborsh%2Frs-calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 569ebba7c3e8113a41072665288851b45a256685
[INFO] testing vladborsh/rs-calculator against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvladborsh%2Frs-calculator" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vladborsh/rs-calculator
[INFO] finished tweaking git repo https://github.com/vladborsh/rs-calculator
[INFO] tweaked toml for git repo https://github.com/vladborsh/rs-calculator written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vladborsh/rs-calculator on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vladborsh/rs-calculator 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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3db1b769c9289e1ade053d0d74879aced1c739773ad95303bf68b9e6fb624b2
[INFO] running `Command { std: "docker" "start" "-a" "c3db1b769c9289e1ade053d0d74879aced1c739773ad95303bf68b9e6fb624b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3db1b769c9289e1ade053d0d74879aced1c739773ad95303bf68b9e6fb624b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3db1b769c9289e1ade053d0d74879aced1c739773ad95303bf68b9e6fb624b2", kill_on_drop: false }`
[INFO] [stdout] c3db1b769c9289e1ade053d0d74879aced1c739773ad95303bf68b9e6fb624b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42d0f6b67f3898e67202b69f1f5a11c5a3c4909067a8f101dfb25322c97351d6
[INFO] running `Command { std: "docker" "start" "-a" "42d0f6b67f3898e67202b69f1f5a11c5a3c4909067a8f101dfb25322c97351d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `cursor` is never used
[INFO] [stdout]   --> src/stack.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl <T>Stack<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn cursor(&self) -> Cursor<'_, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cursor` is never constructed
[INFO] [stdout]   --> src/stack.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct Cursor<'s, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `peek` and `advance` are never used
[INFO] [stdout]   --> src/stack.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl <'a, T> Cursor<'a, T> {
[INFO] [stdout]    | -------------------------- methods in this implementation
[INFO] [stdout] 48 |     pub fn peek(&self) -> Option<&'a T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn advance(&mut self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "42d0f6b67f3898e67202b69f1f5a11c5a3c4909067a8f101dfb25322c97351d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42d0f6b67f3898e67202b69f1f5a11c5a3c4909067a8f101dfb25322c97351d6", kill_on_drop: false }`
[INFO] [stdout] 42d0f6b67f3898e67202b69f1f5a11c5a3c4909067a8f101dfb25322c97351d6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f97e0c476464d3681fd4d82d7c9f1a9b6a2be207fa36ee17442ac676bdf756ef
[INFO] running `Command { std: "docker" "start" "-a" "f97e0c476464d3681fd4d82d7c9f1a9b6a2be207fa36ee17442ac676bdf756ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `cursor` is never used
[INFO] [stdout]   --> src/stack.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl <T>Stack<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub fn cursor(&self) -> Cursor<'_, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cursor` is never constructed
[INFO] [stdout]   --> src/stack.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct Cursor<'s, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `peek` and `advance` are never used
[INFO] [stdout]   --> src/stack.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl <'a, T> Cursor<'a, T> {
[INFO] [stdout]    | -------------------------- methods in this implementation
[INFO] [stdout] 48 |     pub fn peek(&self) -> Option<&'a T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |     pub fn advance(&mut self) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "f97e0c476464d3681fd4d82d7c9f1a9b6a2be207fa36ee17442ac676bdf756ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f97e0c476464d3681fd4d82d7c9f1a9b6a2be207fa36ee17442ac676bdf756ef", kill_on_drop: false }`
[INFO] [stdout] f97e0c476464d3681fd4d82d7c9f1a9b6a2be207fa36ee17442ac676bdf756ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2d4e893783c28902432d91e63d2d0bd116a537cf2b812f60697590752e1fe79c
[INFO] running `Command { std: "docker" "start" "-a" "2d4e893783c28902432d91e63d2d0bd116a537cf2b812f60697590752e1fe79c", kill_on_drop: false }`
[INFO] [stderr] warning: method `cursor` is never used
[INFO] [stderr]   --> src/stack.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr]  9 | impl <T>Stack<T> {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 36 |     pub fn cursor(&self) -> Cursor<'_, T> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Cursor` is never constructed
[INFO] [stderr]   --> src/stack.rs:43:12
[INFO] [stderr]    |
[INFO] [stderr] 43 | pub struct Cursor<'s, T> {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `peek` and `advance` are never used
[INFO] [stderr]   --> src/stack.rs:48:12
[INFO] [stderr]    |
[INFO] [stderr] 47 | impl <'a, T> Cursor<'a, T> {
[INFO] [stderr]    | -------------------------- methods in this implementation
[INFO] [stderr] 48 |     pub fn peek(&self) -> Option<&'a T> {
[INFO] [stderr]    |            ^^^^
[INFO] [stderr] ...
[INFO] [stderr] 52 |     pub fn advance(&mut self) {
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `calculator` (bin "calculator" test) generated 3 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/calculator-c26707604600c006)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2d4e893783c28902432d91e63d2d0bd116a537cf2b812f60697590752e1fe79c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d4e893783c28902432d91e63d2d0bd116a537cf2b812f60697590752e1fe79c", kill_on_drop: false }`
[INFO] [stdout] 2d4e893783c28902432d91e63d2d0bd116a537cf2b812f60697590752e1fe79c