[INFO] fetching crate one-stack-vec 0.5.1... [INFO] checking one-stack-vec-0.5.1 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248 [INFO] extracting crate one-stack-vec 0.5.1 into /workspace/builds/worker-7/source [INFO] validating manifest of crates.io crate one-stack-vec 0.5.1 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate one-stack-vec 0.5.1 [INFO] finished tweaking crates.io crate one-stack-vec 0.5.1 [INFO] tweaked toml for crates.io crate one-stack-vec 0.5.1 written to /workspace/builds/worker-7/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 1d55155cc8bac68e8622e3cc724189a62bae0eb1e751848fb28737b7a4a1bedb [INFO] running `Command { std: "docker" "start" "-a" "1d55155cc8bac68e8622e3cc724189a62bae0eb1e751848fb28737b7a4a1bedb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1d55155cc8bac68e8622e3cc724189a62bae0eb1e751848fb28737b7a4a1bedb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1d55155cc8bac68e8622e3cc724189a62bae0eb1e751848fb28737b7a4a1bedb", kill_on_drop: false }` [INFO] [stdout] 1d55155cc8bac68e8622e3cc724189a62bae0eb1e751848fb28737b7a4a1bedb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] dd90e58135c7081957a268618db86cb391bf8f65c5acf32756f6314ef5a3cd2e [INFO] running `Command { std: "docker" "start" "-a" "dd90e58135c7081957a268618db86cb391bf8f65c5acf32756f6314ef5a3cd2e", kill_on_drop: false }` [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Checking one-stack-vec v0.5.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/lib.rs:51:17 [INFO] [stdout] | [INFO] [stdout] 51 | mem::replace(inner, Some((item, Vec::new()))); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking serde_json v1.0.64 [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:217:17 [INFO] [stdout] | [INFO] [stdout] 217 | let mut tmp_vec = $crate::OneStackVec::new(); [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] ... [INFO] [stdout] 233 | let item1: OneStackVec = one_stack_vec![]; [INFO] [stdout] | ---------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] = note: this warning originates in the macro `one_stack_vec` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:217:17 [INFO] [stdout] | [INFO] [stdout] 217 | let mut tmp_vec = $crate::OneStackVec::new(); [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] ... [INFO] [stdout] 234 | let item2: OneStackVec = one_stack_vec![]; [INFO] [stdout] | ---------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `one_stack_vec` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:217:17 [INFO] [stdout] | [INFO] [stdout] 217 | let mut tmp_vec = $crate::OneStackVec::new(); [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] ... [INFO] [stdout] 238 | let item2 = one_stack_vec![]; [INFO] [stdout] | ---------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `one_stack_vec` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/lib.rs:217:17 [INFO] [stdout] | [INFO] [stdout] 217 | let mut tmp_vec = $crate::OneStackVec::new(); [INFO] [stdout] | ----^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] ... [INFO] [stdout] 262 | let vec: OneStackVec = one_stack_vec![]; [INFO] [stdout] | ---------------- in this macro invocation [INFO] [stdout] | [INFO] [stdout] = note: this warning originates in the macro `one_stack_vec` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/lib.rs:51:17 [INFO] [stdout] | [INFO] [stdout] 51 | mem::replace(inner, Some((item, Vec::new()))); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2.46s [INFO] running `Command { std: "docker" "inspect" "dd90e58135c7081957a268618db86cb391bf8f65c5acf32756f6314ef5a3cd2e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dd90e58135c7081957a268618db86cb391bf8f65c5acf32756f6314ef5a3cd2e", kill_on_drop: false }` [INFO] [stdout] dd90e58135c7081957a268618db86cb391bf8f65c5acf32756f6314ef5a3cd2e