[INFO] cloning repository https://github.com/gunzgo2mars/hello-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gunzgo2mars/hello-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgunzgo2mars%2Fhello-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgunzgo2mars%2Fhello-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 53f7888ce9699176065698d51b36800794afacb7
[INFO] checking gunzgo2mars/hello-rust against try#e658ebe4ffa1b515cd2ef06dd428d0d063e2ae6b for pr-144896
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgunzgo2mars%2Fhello-rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/gunzgo2mars/hello-rust
[INFO] finished tweaking git repo https://github.com/gunzgo2mars/hello-rust
[INFO] tweaked toml for git repo https://github.com/gunzgo2mars/hello-rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gunzgo2mars/hello-rust on toolchain e658ebe4ffa1b515cd2ef06dd428d0d063e2ae6b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e658ebe4ffa1b515cd2ef06dd428d0d063e2ae6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/gunzgo2mars/hello-rust 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" "+e658ebe4ffa1b515cd2ef06dd428d0d063e2ae6b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+e658ebe4ffa1b515cd2ef06dd428d0d063e2ae6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa51d1a6903caae468600a05c827060c610a3aaf4beba9abf53dd975f5d88fed
[INFO] running `Command { std: "docker" "start" "-a" "aa51d1a6903caae468600a05c827060c610a3aaf4beba9abf53dd975f5d88fed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa51d1a6903caae468600a05c827060c610a3aaf4beba9abf53dd975f5d88fed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa51d1a6903caae468600a05c827060c610a3aaf4beba9abf53dd975f5d88fed", kill_on_drop: false }`
[INFO] [stdout] aa51d1a6903caae468600a05c827060c610a3aaf4beba9abf53dd975f5d88fed
[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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+e658ebe4ffa1b515cd2ef06dd428d0d063e2ae6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5f750ae67b0e20885a9fc45d95e4933d35c536646a471c84d616bb1dee1b37c4
[INFO] running `Command { std: "docker" "start" "-a" "5f750ae67b0e20885a9fc45d95e4933d35c536646a471c84d616bb1dee1b37c4", kill_on_drop: false }`
[INFO] [stderr]     Checking hello-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:404:9
[INFO] [stdout]     |
[INFO] [stdout] 404 |     let mut s = String::from("data");
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:404:9
[INFO] [stdout]     |
[INFO] [stdout] 404 |     let mut s = String::from("data");
[INFO] [stdout]     |         ----^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_semantics` is never used
[INFO] [stdout]    --> src/main.rs:370:4
[INFO] [stdout]     |
[INFO] [stdout] 370 | fn move_semantics() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_name` is never used
[INFO] [stdout]    --> src/main.rs:380:4
[INFO] [stdout]     |
[INFO] [stdout] 380 | fn print_name(name: &String) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrowing_with_shared` is never used
[INFO] [stdout]    --> src/main.rs:384:4
[INFO] [stdout]     |
[INFO] [stdout] 384 | fn borrowing_with_shared() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_mutable` is never used
[INFO] [stdout]    --> src/main.rs:392:4
[INFO] [stdout]     |
[INFO] [stdout] 392 | fn add_mutable(s: &mut String) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `move_semantics` is never used
[INFO] [stdout]    --> src/main.rs:370:4
[INFO] [stdout]     |
[INFO] [stdout] 370 | fn move_semantics() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_with_mutable` is never used
[INFO] [stdout]    --> src/main.rs:396:4
[INFO] [stdout]     |
[INFO] [stdout] 396 | fn borrow_with_mutable() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_checker` is never used
[INFO] [stdout]    --> src/main.rs:403:4
[INFO] [stdout]     |
[INFO] [stdout] 403 | fn borrow_checker() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_name` is never used
[INFO] [stdout]    --> src/main.rs:380:4
[INFO] [stdout]     |
[INFO] [stdout] 380 | fn print_name(name: &String) {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `re_borrowing` is never used
[INFO] [stdout]    --> src/main.rs:416:4
[INFO] [stdout]     |
[INFO] [stdout] 416 | fn re_borrowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrowing_with_shared` is never used
[INFO] [stdout]    --> src/main.rs:384:4
[INFO] [stdout]     |
[INFO] [stdout] 384 | fn borrowing_with_shared() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dangling_ref` is never used
[INFO] [stdout]    --> src/main.rs:426:4
[INFO] [stdout]     |
[INFO] [stdout] 426 | fn dangling_ref() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `smart_pointers` is never used
[INFO] [stdout]    --> src/main.rs:433:4
[INFO] [stdout]     |
[INFO] [stdout] 433 | fn smart_pointers() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_mutable` is never used
[INFO] [stdout]    --> src/main.rs:392:4
[INFO] [stdout]     |
[INFO] [stdout] 392 | fn add_mutable(s: &mut String) {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure_capture` is never used
[INFO] [stdout]    --> src/main.rs:462:4
[INFO] [stdout]     |
[INFO] [stdout] 462 | fn closure_capture() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_with_mutable` is never used
[INFO] [stdout]    --> src/main.rs:396:4
[INFO] [stdout]     |
[INFO] [stdout] 396 | fn borrow_with_mutable() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `borrow_checker` is never used
[INFO] [stdout]    --> src/main.rs:403:4
[INFO] [stdout]     |
[INFO] [stdout] 403 | fn borrow_checker() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator_style` is never used
[INFO] [stdout]    --> src/main.rs:479:4
[INFO] [stdout]     |
[INFO] [stdout] 479 | fn iterator_style() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `re_borrowing` is never used
[INFO] [stdout]    --> src/main.rs:416:4
[INFO] [stdout]     |
[INFO] [stdout] 416 | fn re_borrowing() {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `dangling_ref` is never used
[INFO] [stdout]    --> src/main.rs:426:4
[INFO] [stdout]     |
[INFO] [stdout] 426 | fn dangling_ref() -> String {
[INFO] [stdout]     |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `smart_pointers` is never used
[INFO] [stdout]    --> src/main.rs:433:4
[INFO] [stdout]     |
[INFO] [stdout] 433 | fn smart_pointers() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `closure_capture` is never used
[INFO] [stdout]    --> src/main.rs:462:4
[INFO] [stdout]     |
[INFO] [stdout] 462 | fn closure_capture() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iterator_style` is never used
[INFO] [stdout]    --> src/main.rs:479:4
[INFO] [stdout]     |
[INFO] [stdout] 479 | fn iterator_style() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "5f750ae67b0e20885a9fc45d95e4933d35c536646a471c84d616bb1dee1b37c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f750ae67b0e20885a9fc45d95e4933d35c536646a471c84d616bb1dee1b37c4", kill_on_drop: false }`
[INFO] [stdout] 5f750ae67b0e20885a9fc45d95e4933d35c536646a471c84d616bb1dee1b37c4