[INFO] fetching crate fc_add 0.2.0...
[INFO] testing fc_add-0.2.0 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate fc_add 0.2.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate fc_add 0.2.0
[INFO] finished tweaking crates.io crate fc_add 0.2.0
[INFO] tweaked toml for crates.io crate fc_add 0.2.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fc_add 0.2.0 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 crates.io crate fc_add 0.2.0 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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 619f741e6a1a62d6ec1b13a058bc8d670cf87043ec314d17c07c74d74a9a47ee
[INFO] running `Command { std: "docker" "start" "-a" "619f741e6a1a62d6ec1b13a058bc8d670cf87043ec314d17c07c74d74a9a47ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "619f741e6a1a62d6ec1b13a058bc8d670cf87043ec314d17c07c74d74a9a47ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "619f741e6a1a62d6ec1b13a058bc8d670cf87043ec314d17c07c74d74a9a47ee", kill_on_drop: false }`
[INFO] [stdout] 619f741e6a1a62d6ec1b13a058bc8d670cf87043ec314d17c07c74d74a9a47ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 0fe0352c456b3503a5dfc1490f76b9632e45d182cd79455479bf88705cc0aa35
[INFO] running `Command { std: "docker" "start" "-a" "0fe0352c456b3503a5dfc1490f76b9632e45d182cd79455479bf88705cc0aa35", kill_on_drop: false }`
[INFO] [stderr]    Compiling fc_add v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]  --> src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let t: Vec<_> = arr.iter().map(|x| x + 1).collect();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]  --> src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let m: Vec<_> = arr.into_iter().filter(|x| x % 2 == 0).collect();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher` is never constructed
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Cacher<T> where T: Fn(u32) -> u32 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/main.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl<T> Cacher<T> where T: Fn(u32) -> u32 {
[INFO] [stdout]    | ----------------------------------------- associated items in this implementation
[INFO] [stdout] 31 |     fn new(calculation: T) -> Cacher<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "0fe0352c456b3503a5dfc1490f76b9632e45d182cd79455479bf88705cc0aa35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0fe0352c456b3503a5dfc1490f76b9632e45d182cd79455479bf88705cc0aa35", kill_on_drop: false }`
[INFO] [stdout] 0fe0352c456b3503a5dfc1490f76b9632e45d182cd79455479bf88705cc0aa35
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] e93c089aed8109990bd6807207cb8336533e8f4cdea2341067d112415c8564d5
[INFO] running `Command { std: "docker" "start" "-a" "e93c089aed8109990bd6807207cb8336533e8f4cdea2341067d112415c8564d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling fc_add v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]  --> src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let t: Vec<_> = arr.iter().map(|x| x + 1).collect();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `m`
[INFO] [stdout]  --> src/main.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let m: Vec<_> = arr.into_iter().filter(|x| x % 2 == 0).collect();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cacher` is never constructed
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct Cacher<T> where T: Fn(u32) -> u32 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `value` are never used
[INFO] [stdout]   --> src/main.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | impl<T> Cacher<T> where T: Fn(u32) -> u32 {
[INFO] [stdout]    | ----------------------------------------- associated items in this implementation
[INFO] [stdout] 31 |     fn new(calculation: T) -> Cacher<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn value(&mut self, arg: u32) -> u32 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "e93c089aed8109990bd6807207cb8336533e8f4cdea2341067d112415c8564d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e93c089aed8109990bd6807207cb8336533e8f4cdea2341067d112415c8564d5", kill_on_drop: false }`
[INFO] [stdout] e93c089aed8109990bd6807207cb8336533e8f4cdea2341067d112415c8564d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] e8e1eacd636c3eb902cf3aaf609f0fbab962a06ccdc4487f9975d9124f5514f7
[INFO] running `Command { std: "docker" "start" "-a" "e8e1eacd636c3eb902cf3aaf609f0fbab962a06ccdc4487f9975d9124f5514f7", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]  --> src/main.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let t: Vec<_> = arr.iter().map(|x| x + 1).collect();
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m`
[INFO] [stderr]  --> src/main.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |     let m: Vec<_> = arr.into_iter().filter(|x| x % 2 == 0).collect();
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Cacher` is never constructed
[INFO] [stderr]   --> src/main.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct Cacher<T> where T: Fn(u32) -> u32 {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `value` are never used
[INFO] [stderr]   --> src/main.rs:31:8
[INFO] [stderr]    |
[INFO] [stderr] 30 | impl<T> Cacher<T> where T: Fn(u32) -> u32 {
[INFO] [stderr]    | ----------------------------------------- associated items in this implementation
[INFO] [stderr] 31 |     fn new(calculation: T) -> Cacher<T> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] ...
[INFO] [stderr] 37 |     fn value(&mut self, arg: u32) -> u32 {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `fc_add` (bin "fc_add" test) generated 4 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/fc_add-6d3de30a0c5610ca)
[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" "e8e1eacd636c3eb902cf3aaf609f0fbab962a06ccdc4487f9975d9124f5514f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8e1eacd636c3eb902cf3aaf609f0fbab962a06ccdc4487f9975d9124f5514f7", kill_on_drop: false }`
[INFO] [stdout] e8e1eacd636c3eb902cf3aaf609f0fbab962a06ccdc4487f9975d9124f5514f7