[INFO] fetching crate microstack 0.0.7... [INFO] building microstack-0.0.7 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1 [INFO] extracting crate microstack 0.0.7 into /workspace/builds/worker-1-tc2/source [INFO] started tweaking crates.io crate microstack 0.0.7 [INFO] finished tweaking crates.io crate microstack 0.0.7 [INFO] tweaked toml for crates.io crate microstack 0.0.7 written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate microstack 0.0.7 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 8 packages to latest compatible versions [INFO] [stderr] Adding bincode v1.3.3 (available: v2.0.1) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e0d1b3c4108683eeef5edd22c459cd149c3c21b63c96cf9c93e7039d9d74e358 [INFO] running `Command { std: "docker" "start" "-a" "e0d1b3c4108683eeef5edd22c459cd149c3c21b63c96cf9c93e7039d9d74e358", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e0d1b3c4108683eeef5edd22c459cd149c3c21b63c96cf9c93e7039d9d74e358", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e0d1b3c4108683eeef5edd22c459cd149c3c21b63c96cf9c93e7039d9d74e358", kill_on_drop: false }` [INFO] [stdout] e0d1b3c4108683eeef5edd22c459cd149c3c21b63c96cf9c93e7039d9d74e358 [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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 6ddbffb5fcf234d01fa59b15c95cdabe8a1deb3a02df23faaf6591e496308112 [INFO] running `Command { std: "docker" "start" "-a" "6ddbffb5fcf234d01fa59b15c95cdabe8a1deb3a02df23faaf6591e496308112", kill_on_drop: false }` [INFO] [stderr] Compiling microstack v0.0.7 (/opt/rustwide/workdir) [INFO] [stdout] error: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/clone.rs:26:5 [INFO] [stdout] | [INFO] [stdout] 26 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits [INFO] [stdout] note: the lint level is defined here [INFO] [stdout] --> src/lib.rs:41:9 [INFO] [stdout] | [INFO] [stdout] 41 | #![deny(warnings)] [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] = note: `#[deny(unused_attributes)]` implied by `#[deny(warnings)]` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/ctors.rs:27:5 [INFO] [stdout] | [INFO] [stdout] 27 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/iterators.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 28 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: `#[must_use]` attribute cannot be used on trait methods in impl blocks [INFO] [stdout] --> src/iterators.rs:56:5 [INFO] [stdout] | [INFO] [stdout] 56 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! [INFO] [stdout] = help: `#[must_use]` can be applied to data types, functions, unions, required trait methods, provided trait methods, inherent methods, foreign functions, and traits [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/iterators.rs:73:23 [INFO] [stdout] | [INFO] [stdout] 73 | pub const fn iter(&self) -> Iter { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[deny(mismatched_lifetime_syntaxes)]` implied by `#[deny(warnings)]` [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 73 | pub const fn iter(&self) -> Iter<'_, V, N> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `microstack` (lib) due to 5 previous errors [INFO] running `Command { std: "docker" "inspect" "6ddbffb5fcf234d01fa59b15c95cdabe8a1deb3a02df23faaf6591e496308112", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6ddbffb5fcf234d01fa59b15c95cdabe8a1deb3a02df23faaf6591e496308112", kill_on_drop: false }` [INFO] [stdout] 6ddbffb5fcf234d01fa59b15c95cdabe8a1deb3a02df23faaf6591e496308112