[INFO] fetching crate step-rust 0.1.0...
[INFO] building step-rust-0.1.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate step-rust 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate step-rust 0.1.0
[INFO] finished tweaking crates.io crate step-rust 0.1.0
[INFO] tweaked toml for crates.io crate step-rust 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate step-rust 0.1.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate step-rust 0.1.0 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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "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-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1f8e6fccddb559f2bea5f50b95e45259475cea6bd9a1603e6e3762c6c4884f81
[INFO] running `Command { std: "docker" "start" "-a" "1f8e6fccddb559f2bea5f50b95e45259475cea6bd9a1603e6e3762c6c4884f81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f8e6fccddb559f2bea5f50b95e45259475cea6bd9a1603e6e3762c6c4884f81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f8e6fccddb559f2bea5f50b95e45259475cea6bd9a1603e6e3762c6c4884f81", kill_on_drop: false }`
[INFO] [stdout] 1f8e6fccddb559f2bea5f50b95e45259475cea6bd9a1603e6e3762c6c4884f81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0cd1fb88cfda38a92bf40186da6b24d0f6fbb2d25bf78663b5dd6f5cd179f776
[INFO] running `Command { std: "docker" "start" "-a" "0cd1fb88cfda38a92bf40186da6b24d0f6fbb2d25bf78663b5dd6f5cd179f776", kill_on_drop: false }`
[INFO] [stderr]    Compiling step-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]  --> src/closure.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let closure_1 = |num| {
[INFO] [stdout]   |                      ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]   --> src/closure.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let closure_1 = |num| {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure1` is never used
[INFO] [stdout]  --> src/closure.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn closure1() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure2` is never used
[INFO] [stdout]   --> src/closure.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn closure2() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher` is never constructed
[INFO] [stdout]   --> src/closure.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Cacher<T>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/closure.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | / impl<T> Cacher<T>
[INFO] [stdout] 44 | |     where T: Fn(u32) -> u32,
[INFO] [stdout]    | |____________________________- associated function in this implementation
[INFO] [stdout] 45 |   {
[INFO] [stdout] 46 |       fn new(calculation: T) -> Cacher<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator1` is never used
[INFO] [stdout]  --> src/iterator.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn iterator1() {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator31` is never used
[INFO] [stdout]   --> src/iterator.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn iterator31() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator32` is never used
[INFO] [stdout]   --> src/iterator.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn iterator32() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator4` is never used
[INFO] [stdout]   --> src/iterator.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn iterator4() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/iterator.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/iterator.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | impl Counter {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 63 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator5` is never used
[INFO] [stdout]   --> src/iterator.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn iterator5() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "0cd1fb88cfda38a92bf40186da6b24d0f6fbb2d25bf78663b5dd6f5cd179f776", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cd1fb88cfda38a92bf40186da6b24d0f6fbb2d25bf78663b5dd6f5cd179f776", kill_on_drop: false }`
[INFO] [stdout] 0cd1fb88cfda38a92bf40186da6b24d0f6fbb2d25bf78663b5dd6f5cd179f776
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 823b6b923fb868787d113ccc847b060ffb64422acd9794391388bcaf09e6f652
[INFO] running `Command { std: "docker" "start" "-a" "823b6b923fb868787d113ccc847b060ffb64422acd9794391388bcaf09e6f652", kill_on_drop: false }`
[INFO] [stderr]    Compiling step-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]  --> src/closure.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let closure_1 = |num| {
[INFO] [stdout]   |                      ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]   --> src/closure.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let closure_1 = |num| {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure1` is never used
[INFO] [stdout]  --> src/closure.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn closure1() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure2` is never used
[INFO] [stdout]   --> src/closure.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn closure2() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher` is never constructed
[INFO] [stdout]   --> src/closure.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Cacher<T>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/closure.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | / impl<T> Cacher<T>
[INFO] [stdout] 44 | |     where T: Fn(u32) -> u32,
[INFO] [stdout]    | |____________________________- associated function in this implementation
[INFO] [stdout] 45 |   {
[INFO] [stdout] 46 |       fn new(calculation: T) -> Cacher<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator1` is never used
[INFO] [stdout]  --> src/iterator.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn iterator1() {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator31` is never used
[INFO] [stdout]   --> src/iterator.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn iterator31() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator32` is never used
[INFO] [stdout]   --> src/iterator.rs:29:8
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn iterator32() {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator4` is never used
[INFO] [stdout]   --> src/iterator.rs:45:8
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub fn iterator4() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/iterator.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/iterator.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | impl Counter {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 63 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator5` is never used
[INFO] [stdout]   --> src/iterator.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn iterator5() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `setup` is never used
[INFO] [stdout]  --> tests/common/mod.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn setup() {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]  --> src/closure.rs:6:22
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let closure_1 = |num| {
[INFO] [stdout]   |                      ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]   --> src/closure.rs:22:22
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let closure_1 = |num| {
[INFO] [stdout]    |                      ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure1` is never used
[INFO] [stdout]  --> src/closure.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn closure1() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure2` is never used
[INFO] [stdout]   --> src/closure.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn closure2() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher` is never constructed
[INFO] [stdout]   --> src/closure.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | struct Cacher<T>
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/closure.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | / impl<T> Cacher<T>
[INFO] [stdout] 44 | |     where T: Fn(u32) -> u32,
[INFO] [stdout]    | |____________________________- associated function in this implementation
[INFO] [stdout] 45 |   {
[INFO] [stdout] 46 |       fn new(calculation: T) -> Cacher<T> {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator1` is never used
[INFO] [stdout]  --> src/iterator.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn iterator1() {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> src/iterator.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 58 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/iterator.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 62 | impl Counter {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 63 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator5` is never used
[INFO] [stdout]   --> src/iterator.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn iterator5() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "823b6b923fb868787d113ccc847b060ffb64422acd9794391388bcaf09e6f652", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "823b6b923fb868787d113ccc847b060ffb64422acd9794391388bcaf09e6f652", kill_on_drop: false }`
[INFO] [stdout] 823b6b923fb868787d113ccc847b060ffb64422acd9794391388bcaf09e6f652