[INFO] fetching crate unit15 0.1.0... [INFO] checking unit15-0.1.0 against master#249cb84316401daf040832cdbb8a45e0f5ab6af8 for pr-138438 [INFO] extracting crate unit15 0.1.0 into /workspace/builds/worker-2-tc1/source [INFO] validating manifest of crates.io crate unit15 0.1.0 on toolchain 249cb84316401daf040832cdbb8a45e0f5ab6af8 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+249cb84316401daf040832cdbb8a45e0f5ab6af8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate unit15 0.1.0 [INFO] finished tweaking crates.io crate unit15 0.1.0 [INFO] tweaked toml for crates.io crate unit15 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] crate crates.io crate unit15 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" "+249cb84316401daf040832cdbb8a45e0f5ab6af8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+249cb84316401daf040832cdbb8a45e0f5ab6af8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b3a5833a74633eae9138f10419655a6bfb76af4012c2bca4a03bf327f9edf7e9 [INFO] running `Command { std: "docker" "start" "-a" "b3a5833a74633eae9138f10419655a6bfb76af4012c2bca4a03bf327f9edf7e9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b3a5833a74633eae9138f10419655a6bfb76af4012c2bca4a03bf327f9edf7e9", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b3a5833a74633eae9138f10419655a6bfb76af4012c2bca4a03bf327f9edf7e9", kill_on_drop: false }` [INFO] [stdout] b3a5833a74633eae9138f10419655a6bfb76af4012c2bca4a03bf327f9edf7e9 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+249cb84316401daf040832cdbb8a45e0f5ab6af8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0b050844ae09f227eac07c8909f58c6f3219c6ea1e5a2e0111d13f9e527b861a [INFO] running `Command { std: "docker" "start" "-a" "0b050844ae09f227eac07c8909f58c6f3219c6ea1e5a2e0111d13f9e527b861a", kill_on_drop: false }` [INFO] [stderr] Checking unit15 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/main.rs:220:9 [INFO] [stdout] | [INFO] [stdout] 220 | let a = Cons(1, Rc::clone(&rc_list));// 调用Rc::clone(&rc_list)，此处变量rc_list的引用计数为1 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/main.rs:223:13 [INFO] [stdout] | [INFO] [stdout] 223 | let b = Cons(0, Rc::clone(&rc_list));// 调用Rc::clone(&rc_list)，此处变量rc_list的引用计数为2 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> src/main.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 58 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 59 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 60 | parent: RefCell>, [INFO] [stdout] 61 | children: RefCell>>, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:89:14 [INFO] [stdout] | [INFO] [stdout] 89 | Cons(i32, RefCell>), [INFO] [stdout] | ---- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 89 - Cons(i32, RefCell>), [INFO] [stdout] 89 + Cons((), RefCell>), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0` and `1` are never read [INFO] [stdout] --> src/main.rs:117:14 [INFO] [stdout] | [INFO] [stdout] 117 | Cons(Rc>, Rc), [INFO] [stdout] | ---- ^^^^^^^^^^^^^^^^ ^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this variant [INFO] [stdout] | [INFO] [stdout] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields [INFO] [stdout] | [INFO] [stdout] 117 - Cons(Rc>, Rc), [INFO] [stdout] 117 + Cons((), ()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `rc_smart_pointer` is never used [INFO] [stdout] --> src/main.rs:214:4 [INFO] [stdout] | [INFO] [stdout] 214 | fn rc_smart_pointer() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `1` is never read [INFO] [stdout] --> src/main.rs:287:13 [INFO] [stdout] | [INFO] [stdout] 287 | Cons(T, Box>), [INFO] [stdout] | ---- ^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 287 - Cons(T, Box>), [INFO] [stdout] 287 + Cons(T, ()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `RcList` is never used [INFO] [stdout] --> src/main.rs:292:6 [INFO] [stdout] | [INFO] [stdout] 292 | enum RcList { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `a` [INFO] [stdout] --> src/main.rs:220:9 [INFO] [stdout] | [INFO] [stdout] 220 | let a = Cons(1, Rc::clone(&rc_list));// 调用Rc::clone(&rc_list)，此处变量rc_list的引用计数为1 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_a` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> src/main.rs:223:13 [INFO] [stdout] | [INFO] [stdout] 223 | let b = Cons(0, Rc::clone(&rc_list));// 调用Rc::clone(&rc_list)，此处变量rc_list的引用计数为2 [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> src/main.rs:59:9 [INFO] [stdout] | [INFO] [stdout] 58 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 59 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 60 | parent: RefCell>, [INFO] [stdout] 61 | children: RefCell>>, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/main.rs:89:14 [INFO] [stdout] | [INFO] [stdout] 89 | Cons(i32, RefCell>), [INFO] [stdout] | ---- ^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 89 - Cons(i32, RefCell>), [INFO] [stdout] 89 + Cons((), RefCell>), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `0` and `1` are never read [INFO] [stdout] --> src/main.rs:117:14 [INFO] [stdout] | [INFO] [stdout] 117 | Cons(Rc>, Rc), [INFO] [stdout] | ---- ^^^^^^^^^^^^^^^^ ^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | fields in this variant [INFO] [stdout] | [INFO] [stdout] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields [INFO] [stdout] | [INFO] [stdout] 117 - Cons(Rc>, Rc), [INFO] [stdout] 117 + Cons((), ()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `rc_smart_pointer` is never used [INFO] [stdout] --> src/main.rs:214:4 [INFO] [stdout] | [INFO] [stdout] 214 | fn rc_smart_pointer() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `1` is never read [INFO] [stdout] --> src/main.rs:287:13 [INFO] [stdout] | [INFO] [stdout] 287 | Cons(T, Box>), [INFO] [stdout] | ---- ^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `List` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 287 - Cons(T, Box>), [INFO] [stdout] 287 + Cons(T, ()), [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum `RcList` is never used [INFO] [stdout] --> src/main.rs:292:6 [INFO] [stdout] | [INFO] [stdout] 292 | enum RcList { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s [INFO] running `Command { std: "docker" "inspect" "0b050844ae09f227eac07c8909f58c6f3219c6ea1e5a2e0111d13f9e527b861a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0b050844ae09f227eac07c8909f58c6f3219c6ea1e5a2e0111d13f9e527b861a", kill_on_drop: false }` [INFO] [stdout] 0b050844ae09f227eac07c8909f58c6f3219c6ea1e5a2e0111d13f9e527b861a