[INFO] fetching crate free-algebra 0.1.0... [INFO] checking free-algebra-0.1.0 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1 [INFO] extracting crate free-algebra 0.1.0 into /workspace/builds/worker-1-tc1/source [INFO] started tweaking crates.io crate free-algebra 0.1.0 [INFO] finished tweaking crates.io crate free-algebra 0.1.0 [INFO] tweaked toml for crates.io crate free-algebra 0.1.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml [INFO] validating manifest of crates.io crate free-algebra 0.1.0 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "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 derivative v1.0.4 (available: v2.2.0) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded maths-traits v0.2.1 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] aad23f67410d1351b8dbb846c5125fadf84f6bbd9021d91af87728ff18e956e3 [INFO] running `Command { std: "docker" "start" "-a" "aad23f67410d1351b8dbb846c5125fadf84f6bbd9021d91af87728ff18e956e3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "aad23f67410d1351b8dbb846c5125fadf84f6bbd9021d91af87728ff18e956e3", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "aad23f67410d1351b8dbb846c5125fadf84f6bbd9021d91af87728ff18e956e3", kill_on_drop: false }` [INFO] [stdout] aad23f67410d1351b8dbb846c5125fadf84f6bbd9021d91af87728ff18e956e3 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3e43817baf77c5f0c6cadc454a0e5674461151bee16a405cd0e6b6a152d9193d [INFO] running `Command { std: "docker" "start" "-a" "3e43817baf77c5f0c6cadc454a0e5674461151bee16a405cd0e6b6a152d9193d", kill_on_drop: false }` [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Checking maths-traits v0.2.1 [INFO] [stderr] Compiling derivative v1.0.4 [INFO] [stderr] Checking free-algebra v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:77:12 [INFO] [stdout] | [INFO] [stdout] 77 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: ambiguous glob re-exports [INFO] [stdout] --> src/lib.rs:85:9 [INFO] [stdout] | [INFO] [stdout] 85 | pub use self::monoid::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^ the name `Iter` in the type namespace is first re-exported here [INFO] [stdout] 86 | pub use self::module::*; [INFO] [stdout] | --------------- but the name `Iter` in the type namespace is also re-exported here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(ambiguous_glob_reexports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: ambiguous glob re-exports [INFO] [stdout] --> src/lib.rs:85:9 [INFO] [stdout] | [INFO] [stdout] 85 | pub use self::monoid::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^ the name `IntoIter` in the type namespace is first re-exported here [INFO] [stdout] 86 | pub use self::module::*; [INFO] [stdout] | --------------- but the name `IntoIter` in the type namespace is also re-exported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: ambiguous glob re-exports [INFO] [stdout] --> src/lib.rs:85:9 [INFO] [stdout] | [INFO] [stdout] 85 | pub use self::monoid::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^ the name `IterMut` in the type namespace is first re-exported here [INFO] [stdout] 86 | pub use self::module::*; [INFO] [stdout] | --------------- but the name `IterMut` in the type namespace is also re-exported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> src/lib.rs:77:12 [INFO] [stdout] | [INFO] [stdout] 77 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: ambiguous glob re-exports [INFO] [stdout] --> src/lib.rs:85:9 [INFO] [stdout] | [INFO] [stdout] 85 | pub use self::monoid::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^ the name `Iter` in the type namespace is first re-exported here [INFO] [stdout] 86 | pub use self::module::*; [INFO] [stdout] | --------------- but the name `Iter` in the type namespace is also re-exported here [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(ambiguous_glob_reexports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: ambiguous glob re-exports [INFO] [stdout] --> src/lib.rs:85:9 [INFO] [stdout] | [INFO] [stdout] 85 | pub use self::monoid::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^ the name `IntoIter` in the type namespace is first re-exported here [INFO] [stdout] 86 | pub use self::module::*; [INFO] [stdout] | --------------- but the name `IntoIter` in the type namespace is also re-exported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: ambiguous glob re-exports [INFO] [stdout] --> src/lib.rs:85:9 [INFO] [stdout] | [INFO] [stdout] 85 | pub use self::monoid::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^ the name `IterMut` in the type namespace is first re-exported here [INFO] [stdout] 86 | pub use self::module::*; [INFO] [stdout] | --------------- but the name `IterMut` in the type namespace is also re-exported here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/monoid.rs:268:27 [INFO] [stdout] | [INFO] [stdout] 268 | #[inline] pub fn iter(&self) -> Iter { self.string.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: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 268 | #[inline] pub fn iter(&self) -> Iter<'_, C> { self.string.iter() } [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/monoid.rs:292:31 [INFO] [stdout] | [INFO] [stdout] 292 | #[inline] pub fn iter_mut(&mut self) -> IterMut where M:MonoidRule { [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] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 292 | #[inline] pub fn iter_mut(&mut self) -> IterMut<'_, C,M> where M:MonoidRule { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/monoid.rs:268:27 [INFO] [stdout] | [INFO] [stdout] 268 | #[inline] pub fn iter(&self) -> Iter { self.string.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: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 268 | #[inline] pub fn iter(&self) -> Iter<'_, C> { self.string.iter() } [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/monoid.rs:292:31 [INFO] [stdout] | [INFO] [stdout] 292 | #[inline] pub fn iter_mut(&mut self) -> IterMut where M:MonoidRule { [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] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 292 | #[inline] pub fn iter_mut(&mut self) -> IterMut<'_, C,M> where M:MonoidRule { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.46s [INFO] running `Command { std: "docker" "inspect" "3e43817baf77c5f0c6cadc454a0e5674461151bee16a405cd0e6b6a152d9193d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3e43817baf77c5f0c6cadc454a0e5674461151bee16a405cd0e6b6a152d9193d", kill_on_drop: false }` [INFO] [stdout] 3e43817baf77c5f0c6cadc454a0e5674461151bee16a405cd0e6b6a152d9193d