[INFO] cloning repository https://github.com/uamrws/rust_study [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/uamrws/rust_study" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuamrws%2Frust_study", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuamrws%2Frust_study'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] b0fb1b240fb6e750c66e677e4529c4478c164de1 [INFO] checking uamrws/rust_study against master#8317fef20409adedaa7c385fa6e954867bf626fc for pr-154149-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuamrws%2Frust_study" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/uamrws/rust_study [INFO] finished tweaking git repo https://github.com/uamrws/rust_study [INFO] tweaked toml for git repo https://github.com/uamrws/rust_study written to /workspace/builds/worker-0-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/uamrws/rust_study on toolchain 8317fef20409adedaa7c385fa6e954867bf626fc [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8317fef20409adedaa7c385fa6e954867bf626fc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/uamrws/rust_study 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" "+8317fef20409adedaa7c385fa6e954867bf626fc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"` [INFO] [stderr] | [INFO] [stderr] = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest [INFO] [stderr] = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest [INFO] [stderr] = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded tokio-macros v1.8.0 [INFO] [stderr] Downloaded futures v0.3.24 [INFO] [stderr] Downloaded thread_local v1.1.4 [INFO] [stderr] Downloaded parking_lot_core v0.9.3 [INFO] [stderr] Downloaded mio v0.8.4 [INFO] [stderr] Downloaded anyhow v1.0.64 [INFO] [stderr] Downloaded tokio v1.21.0 [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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8317fef20409adedaa7c385fa6e954867bf626fc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 700860b55b0d47bb68934a724e1bda385a72b5fd65d3ef98a14cab86affafabd [INFO] running `Command { std: "docker" "start" "-a" "700860b55b0d47bb68934a724e1bda385a72b5fd65d3ef98a14cab86affafabd", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "700860b55b0d47bb68934a724e1bda385a72b5fd65d3ef98a14cab86affafabd", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "700860b55b0d47bb68934a724e1bda385a72b5fd65d3ef98a14cab86affafabd", kill_on_drop: false }` [INFO] [stdout] 700860b55b0d47bb68934a724e1bda385a72b5fd65d3ef98a14cab86affafabd [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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8317fef20409adedaa7c385fa6e954867bf626fc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 50268971a913c0a0ff32d4687b3e81a284cc78d40571b2e2f4202560968f1eac [INFO] running `Command { std: "docker" "start" "-a" "50268971a913c0a0ff32d4687b3e81a284cc78d40571b2e2f4202560968f1eac", kill_on_drop: false }` [INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"` [INFO] [stderr] | [INFO] [stderr] = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest [INFO] [stderr] = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest [INFO] [stderr] = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions [INFO] [stderr] Compiling proc-macro2 v1.0.43 [INFO] [stderr] Compiling quote v1.0.21 [INFO] [stderr] Compiling syn v1.0.99 [INFO] [stderr] Compiling unicode-ident v1.0.3 [INFO] [stderr] Compiling memchr v2.5.0 [INFO] [stderr] Checking pin-project-lite v0.2.9 [INFO] [stderr] Compiling futures-core v0.3.24 [INFO] [stderr] Compiling futures-channel v0.3.24 [INFO] [stderr] Compiling futures-task v0.3.24 [INFO] [stderr] Compiling futures-util v0.3.24 [INFO] [stderr] Checking futures-sink v0.3.24 [INFO] [stderr] Checking futures-io v0.3.24 [INFO] [stderr] Checking once_cell v1.14.0 [INFO] [stderr] Compiling log v0.4.17 [INFO] [stderr] Compiling serde v1.0.144 [INFO] [stderr] Compiling libc v0.2.132 [INFO] [stderr] Compiling serde_json v1.0.85 [INFO] [stderr] Checking itoa v1.0.3 [INFO] [stderr] Checking ryu v1.0.11 [INFO] [stderr] Compiling lock_api v0.4.8 [INFO] [stderr] Checking section_timer_future v0.1.0 (/opt/rustwide/workdir/section18_async/section_timer_future) [INFO] [stderr] Compiling parking_lot_core v0.9.3 [INFO] [stderr] Compiling anyhow v1.0.64 [INFO] [stderr] Checking section16_raw_pointer v0.1.0 (/opt/rustwide/workdir/section16_raw_pointer) [INFO] [stderr] Checking scopeguard v1.1.0 [INFO] [stderr] Checking thread_local v1.1.4 [INFO] [stderr] Checking smallvec v1.9.0 [INFO] [stderr] Compiling tokio v1.21.0 [INFO] [stderr] Checking bytes v1.2.1 [INFO] [stderr] Checking section13_smart_pointer v0.1.0 (/opt/rustwide/workdir/section13_smart_pointer) [INFO] [stderr] Checking section10_lifetime v0.1.0 (/opt/rustwide/workdir/section10_lifetime) [INFO] [stdout] warning: unused import: `std::result` [INFO] [stdout] --> section10_lifetime/src/bin/main05.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::result; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `value` and `children` are never read [INFO] [stdout] --> section13_smart_pointer/src/bin/main06.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 5 | struct Node { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] 6 | value: i32, [INFO] [stdout] | ^^^^^ [INFO] [stdout] 7 | parent: RefCell>, [INFO] [stdout] 8 | 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)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `section10_lifetime` (bin "main05" test) due to 1 previous error; 2 warnings emitted [INFO] [stdout] error: lifetime may not live long enough [INFO] [stdout] --> section10_lifetime/src/bin/main05.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 13 | fn longest<'a, 'b>(x: &'a str, y: &'b str) -> &'b str { [INFO] [stdout] | -- -- lifetime `'b` defined here [INFO] [stdout] | | [INFO] [stdout] | lifetime `'a` defined here [INFO] [stdout] 14 | x [INFO] [stdout] | ^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a` [INFO] [stdout] | [INFO] [stdout] = help: consider adding the following bound: `'a: 'b` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> section10_lifetime/src/bin/main05.rs:13:32 [INFO] [stdout] | [INFO] [stdout] 13 | fn longest<'a, 'b>(x: &'a str, y: &'b str) -> &'b str { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: lifetime may not live long enough [INFO] [stdout] --> section10_lifetime/src/bin/main07.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 4 | fn temp<'a, 'b>(s: &'b mut &'a str) -> &'b mut &'b str { [INFO] [stdout] | -- -- lifetime `'b` defined here [INFO] [stdout] | | [INFO] [stdout] | lifetime `'a` defined here [INFO] [stdout] 5 | s [INFO] [stdout] | ^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b` [INFO] [stdout] | [INFO] [stdout] = help: consider adding the following bound: `'b: 'a` [INFO] [stdout] = note: requirement occurs because of a mutable reference to `&str` [INFO] [stdout] = note: mutable references are invariant over their type parameter [INFO] [stdout] = help: see for more information about variance [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `section10_lifetime` (bin "main07") due to 1 previous error [INFO] running `Command { std: "docker" "inspect" "50268971a913c0a0ff32d4687b3e81a284cc78d40571b2e2f4202560968f1eac", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "50268971a913c0a0ff32d4687b3e81a284cc78d40571b2e2f4202560968f1eac", kill_on_drop: false }` [INFO] [stdout] 50268971a913c0a0ff32d4687b3e81a284cc78d40571b2e2f4202560968f1eac