[INFO] cloning repository https://github.com/voratham/learn-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/voratham/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvoratham%2Flearn-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvoratham%2Flearn-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5dd4a1ecf069c8c16583bbb064bd64bfeb1817f8 [INFO] checking voratham/learn-rust/5dd4a1ecf069c8c16583bbb064bd64bfeb1817f8 against master#90384941aae4ea38de00e4702b50757e9b882a19 for pr-138340 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvoratham%2Flearn-rust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/voratham/learn-rust on toolchain 90384941aae4ea38de00e4702b50757e9b882a19 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+90384941aae4ea38de00e4702b50757e9b882a19" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/voratham/learn-rust [INFO] finished tweaking git repo https://github.com/voratham/learn-rust [INFO] tweaked toml for git repo https://github.com/voratham/learn-rust written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/voratham/learn-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" "+90384941aae4ea38de00e4702b50757e9b882a19" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded thread-priority v0.16.0 [INFO] [stderr] Downloaded built v0.7.2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+90384941aae4ea38de00e4702b50757e9b882a19" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 5c65789253a27e332c4eaf196eb17ddc82e8e70f6a37d39ed64ab23aa12ef942 [INFO] running `Command { std: "docker" "start" "-a" "5c65789253a27e332c4eaf196eb17ddc82e8e70f6a37d39ed64ab23aa12ef942", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "5c65789253a27e332c4eaf196eb17ddc82e8e70f6a37d39ed64ab23aa12ef942", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5c65789253a27e332c4eaf196eb17ddc82e8e70f6a37d39ed64ab23aa12ef942", kill_on_drop: false }` [INFO] [stdout] 5c65789253a27e332c4eaf196eb17ddc82e8e70f6a37d39ed64ab23aa12ef942 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+90384941aae4ea38de00e4702b50757e9b882a19" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 224ca6d6a3945bc7933d6fc4d4b8bb1a752f3ebd333ac282ec3a2bf48d6bb308 [INFO] running `Command { std: "docker" "start" "-a" "224ca6d6a3945bc7933d6fc4d4b8bb1a752f3ebd333ac282ec3a2bf48d6bb308", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.79 [INFO] [stderr] Compiling unicode-ident v1.0.12 [INFO] [stderr] 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[INFO] [stderr] Checking libc_malloc v0.1.0 (/opt/rustwide/workdir/session4/libc_malloc) [INFO] [stderr] Checking rwlocks v0.1.0 (/opt/rustwide/workdir/session2/rwlocks) [INFO] [stderr] Checking tprio v0.1.0 (/opt/rustwide/workdir/session2/tprio) [INFO] [stdout] warning: function `allocate_memory_with_libc` is never used [INFO] [stdout] --> session4/libc_malloc/src/main.rs:1:4 [INFO] [stdout] | [INFO] [stdout] 1 | fn allocate_memory_with_libc() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `allocate_memory_with_libc` is never used [INFO] [stdout] --> session4/libc_malloc/src/main.rs:1:4 [INFO] [stdout] | [INFO] [stdout] 1 | fn allocate_memory_with_libc() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking variable v0.1.0 (/opt/rustwide/workdir/session1/variable) [INFO] [stdout] warning: static `HIGH_COUNT` is never used [INFO] [stdout] --> session2/tprio/src/main.rs:7:8 [INFO] [stdout] | [INFO] [stdout] 7 | static HIGH_COUNT: AtomicI32 = AtomicI32::new(0); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking channels1 v0.1.0 (/opt/rustwide/workdir/session2/channels1) [INFO] [stdout] warning: function `double` is never used [INFO] [stdout] --> session1/variable/src/main.rs:1:4 [INFO] [stdout] | [INFO] [stdout] 1 | fn double(n: i32) -> i32 { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `double_or_nothing` is never used [INFO] [stdout] --> session1/variable/src/main.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | fn double_or_nothing(n: i32) -> i32 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `greet` is never used [INFO] [stdout] --> session1/variable/src/main.rs:13:4 [INFO] [stdout] | [INFO] [stdout] 13 | fn greet(s: String) -> String { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `greet_borrow` is never used [INFO] [stdout] --> session1/variable/src/main.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn greet_borrow(s: &String) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `greet_borrow_mut` is never used [INFO] [stdout] --> session1/variable/src/main.rs:22:4 [INFO] [stdout] | [INFO] [stdout] 22 | fn greet_borrow_mut(s: &mut String) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking learn-rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking smartpointer v0.1.0 (/opt/rustwide/workdir/session4/smartpointer) [INFO] [stdout] warning: static `HIGH_COUNT` is never used [INFO] [stdout] --> session2/tprio/src/main.rs:7:8 [INFO] [stdout] | [INFO] [stdout] 7 | static HIGH_COUNT: AtomicI32 = AtomicI32::new(0); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking dropping_smart_pointer v0.1.0 (/opt/rustwide/workdir/session4/dropping_smart_pointer) [INFO] [stderr] Checking memory v0.1.0 (/opt/rustwide/workdir/session4/memory) [INFO] [stderr] Checking dropping v0.1.0 (/opt/rustwide/workdir/session4/dropping) [INFO] [stdout] warning: unused variable: `my_vec_in_case_error` [INFO] [stdout] --> session4/memory/src/main.rs:16:9 [INFO] [stdout] | [INFO] [stdout] 16 | let my_vec_in_case_error = Vec::::new(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_vec_in_case_error` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `get_index` [INFO] [stdout] --> session4/memory/src/main.rs:20:13 [INFO] [stdout] | [INFO] [stdout] 20 | let get_index = my_vec.get_unchecked(2); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_get_index` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary `unsafe` block [INFO] [stdout] --> session4/memory/src/main.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 10 | unsafe { [INFO] [stdout] | ^^^^^^ unnecessary `unsafe` block [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_unsafe)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `my_fn` is never used [INFO] [stdout] --> session4/memory/src/main.rs:4:11 [INFO] [stdout] | [INFO] [stdout] 4 | unsafe fn my_fn() {} [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking refcount v0.1.0 (/opt/rustwide/workdir/session4/refcount) [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> session4/smartpointer/src/main.rs:48:24 [INFO] [stdout] | [INFO] [stdout] 48 | *v2.borrow_mut() = Box::new(20); // changed value v2 [INFO] [stdout] | ---------------- ^^^^^^^^^^^^ expected integer, found `Box<{integer}>` [INFO] [stdout] | | [INFO] [stdout] | expected due to the type of this binding [INFO] [stdout] | [INFO] [stdout] = note: expected type `{integer}` [INFO] [stdout] found struct `Box<{integer}>` [INFO] [stdout] help: consider unboxing the value [INFO] [stdout] | [INFO] [stdout] 48 | *v2.borrow_mut() = *Box::new(20); // changed value v2 [INFO] [stdout] | + [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stdout] warning: unused import: `core::str` [INFO] [stdout] --> session4/dropping/src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use core::str; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `thread::sleep` and `time::Duration` [INFO] [stdout] --> session4/refcount/src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | thread::sleep, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] 4 | time::Duration, [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `SharedData` is never constructed [INFO] [stdout] --> session4/refcount/src/main.rs:7:8 [INFO] [stdout] | [INFO] [stdout] 7 | struct SharedData(String); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> session4/dropping/src/main.rs:32:13 [INFO] [stdout] | [INFO] [stdout] 32 | let y = MyStruct::new(2); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `has_drop` [INFO] [stdout] --> session4/dropping/src/main.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | let has_drop = HasDroppables { [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_drop` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `x` is never read [INFO] [stdout] --> session4/dropping/src/main.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 20 | struct HasDroppables { [INFO] [stdout] | ------------- field in this struct [INFO] [stdout] 21 | x: MyStruct, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `smartpointer` (bin "smartpointer") due to 1 previous error [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: unused import: `core::str` [INFO] [stdout] --> session4/dropping/src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use core::str; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> session4/dropping/src/main.rs:32:13 [INFO] [stdout] | [INFO] [stdout] 32 | let y = MyStruct::new(2); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `has_drop` [INFO] [stdout] --> session4/dropping/src/main.rs:38:9 [INFO] [stdout] | [INFO] [stdout] 38 | let has_drop = HasDroppables { [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_has_drop` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `x` is never read [INFO] [stdout] --> session4/dropping/src/main.rs:21:5 [INFO] [stdout] | [INFO] [stdout] 20 | struct HasDroppables { [INFO] [stdout] | ------------- field in this struct [INFO] [stdout] 21 | x: MyStruct, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `double` is never used [INFO] [stdout] --> session1/variable/src/main.rs:1:4 [INFO] [stdout] | [INFO] [stdout] 1 | fn double(n: i32) -> i32 { [INFO] [stdout] | ^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `double_or_nothing` is never used [INFO] [stdout] --> session1/variable/src/main.rs:5:4 [INFO] [stdout] | [INFO] [stdout] 5 | fn double_or_nothing(n: i32) -> i32 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `greet` is never used [INFO] [stdout] --> session1/variable/src/main.rs:13:4 [INFO] [stdout] | [INFO] [stdout] 13 | fn greet(s: String) -> String { [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `greet_borrow` is never used [INFO] [stdout] --> session1/variable/src/main.rs:18:4 [INFO] [stdout] | [INFO] [stdout] 18 | fn greet_borrow(s: &String) { [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `greet_borrow_mut` is never used [INFO] [stdout] --> session1/variable/src/main.rs:22:4 [INFO] [stdout] | [INFO] [stdout] 22 | fn greet_borrow_mut(s: &mut String) { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "224ca6d6a3945bc7933d6fc4d4b8bb1a752f3ebd333ac282ec3a2bf48d6bb308", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "224ca6d6a3945bc7933d6fc4d4b8bb1a752f3ebd333ac282ec3a2bf48d6bb308", kill_on_drop: false }` [INFO] [stdout] 224ca6d6a3945bc7933d6fc4d4b8bb1a752f3ebd333ac282ec3a2bf48d6bb308