[INFO] fetching crate free-algebra 0.1.0...
[INFO] testing free-algebra-0.1.0 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate free-algebra 0.1.0 into /workspace/builds/worker-5-tc2/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-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate free-algebra 0.1.0 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 165e829156d26ed01716ee249dbd382a1f10ebe6eceae153971012f5f6f751a5
[INFO] running `Command { std: "docker" "start" "-a" "165e829156d26ed01716ee249dbd382a1f10ebe6eceae153971012f5f6f751a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "165e829156d26ed01716ee249dbd382a1f10ebe6eceae153971012f5f6f751a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "165e829156d26ed01716ee249dbd382a1f10ebe6eceae153971012f5f6f751a5", kill_on_drop: false }`
[INFO] [stdout] 165e829156d26ed01716ee249dbd382a1f10ebe6eceae153971012f5f6f751a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1085940ddd0dcdd03e588aeaa6021d7149024205ee63982aac7475911158ed54
[INFO] running `Command { std: "docker" "start" "-a" "1085940ddd0dcdd03e588aeaa6021d7149024205ee63982aac7475911158ed54", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling maths-traits v0.2.1
[INFO] [stderr]    Compiling derivative v1.0.4
[INFO] [stderr]    Compiling 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 <https://github.com/rust-lang/rust/issues/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<C> { 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<C,M> where M:MonoidRule<C> {
[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<C> {
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.55s
[INFO] running `Command { std: "docker" "inspect" "1085940ddd0dcdd03e588aeaa6021d7149024205ee63982aac7475911158ed54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1085940ddd0dcdd03e588aeaa6021d7149024205ee63982aac7475911158ed54", kill_on_drop: false }`
[INFO] [stdout] 1085940ddd0dcdd03e588aeaa6021d7149024205ee63982aac7475911158ed54
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3edef274a9d16b9854e2a8dc62730b8e9f65056e8c11e4d7449cb4848bd97301
[INFO] running `Command { std: "docker" "start" "-a" "3edef274a9d16b9854e2a8dc62730b8e9f65056e8c11e4d7449cb4848bd97301", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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 <https://github.com/rust-lang/rust/issues/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<C> { 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<C,M> where M:MonoidRule<C> {
[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<C> {
[INFO] [stdout]     |                                                     +++
[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 <https://github.com/rust-lang/rust/issues/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<C> { 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<C,M> where M:MonoidRule<C> {
[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<C> {
[INFO] [stdout]     |                                                     +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "3edef274a9d16b9854e2a8dc62730b8e9f65056e8c11e4d7449cb4848bd97301", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3edef274a9d16b9854e2a8dc62730b8e9f65056e8c11e4d7449cb4848bd97301", kill_on_drop: false }`
[INFO] [stdout] 3edef274a9d16b9854e2a8dc62730b8e9f65056e8c11e4d7449cb4848bd97301
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b1b1c60809484c6c421e91be5bc18a7942adfe5fe016460a9382660fb71bdbdd
[INFO] running `Command { std: "docker" "start" "-a" "b1b1c60809484c6c421e91be5bc18a7942adfe5fe016460a9382660fb71bdbdd", kill_on_drop: false }`
[INFO] [stderr] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stderr]   --> src/lib.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 | #![feature(specialization)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stderr]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stderr]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: ambiguous glob re-exports
[INFO] [stderr]   --> src/lib.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 | pub use self::monoid::*;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ the name `Iter` in the type namespace is first re-exported here
[INFO] [stderr] 86 | pub use self::module::*;
[INFO] [stderr]    |         --------------- but the name `Iter` in the type namespace is also re-exported here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(ambiguous_glob_reexports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: ambiguous glob re-exports
[INFO] [stderr]   --> src/lib.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 | pub use self::monoid::*;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ the name `IntoIter` in the type namespace is first re-exported here
[INFO] [stderr] 86 | pub use self::module::*;
[INFO] [stderr]    |         --------------- but the name `IntoIter` in the type namespace is also re-exported here
[INFO] [stderr] 
[INFO] [stderr] warning: ambiguous glob re-exports
[INFO] [stderr]   --> src/lib.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 | pub use self::monoid::*;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ the name `IterMut` in the type namespace is first re-exported here
[INFO] [stderr] 86 | pub use self::module::*;
[INFO] [stderr]    |         --------------- but the name `IterMut` in the type namespace is also re-exported here
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/monoid.rs:268:27
[INFO] [stderr]     |
[INFO] [stderr] 268 |     #[inline] pub fn iter(&self) -> Iter<C> { self.string.iter() }
[INFO] [stderr]     |                           ^^^^^     ^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 268 |     #[inline] pub fn iter(&self) -> Iter<'_, C> { self.string.iter() }
[INFO] [stderr]     |                                          +++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/monoid.rs:292:31
[INFO] [stderr]     |
[INFO] [stderr] 292 |     #[inline] pub fn iter_mut(&mut self) -> IterMut<C,M> where M:MonoidRule<C> {
[INFO] [stderr]     |                               ^^^^^^^^^     ^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               the lifetime is elided here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 292 |     #[inline] pub fn iter_mut(&mut self) -> IterMut<'_, C,M> where M:MonoidRule<C> {
[INFO] [stderr]     |                                                     +++
[INFO] [stderr] 
[INFO] [stderr] warning: `free-algebra` (lib) generated 6 warnings (run `cargo fix --lib -p free-algebra` to apply 2 suggestions)
[INFO] [stderr] warning: `free-algebra` (lib test) generated 6 warnings (6 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/free_algebra-7bed5e0e43650b21)
[INFO] [stderr]    Doc-tests free_algebra
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stderr]   --> src/lib.rs:77:12
[INFO] [stderr]    |
[INFO] [stderr] 77 | #![feature(specialization)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stderr]    = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stderr]    = note: `#[warn(incomplete_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 26 tests
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M> (line 96) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M> (line 115) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M>::iter (line 254) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R,T,A> (line 75) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M> (line 105) ... ok
[INFO] [stdout] test src/lib.rs - (line 21) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R,T,A>::commutator (line 352) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M> (line 124) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R,T,A>::iter_mut (line 303) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M>::iter_mut (line 277) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M>::commutator (line 337) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R,T,A>::get (line 279) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R,T,A>::len (line 236) ... ok
[INFO] [stdout] test src/specifics/free_group.rs - specifics::free_group::FreeGroup (line 10) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M>::len (line 236) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R,T,A>::get_ref (line 258) ... ok
[INFO] [stdout] test src/module.rs - module::ModuleString<R,T,A>::commutator (line 329) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M>::reverse (line 302) ... ok
[INFO] [stdout] test src/monoid.rs - monoid::MonoidalString<C,M>::commutator (line 321) ... ok
[INFO] [stdout] test src/specifics/mod.rs - specifics::FreeModule (line 92) ... ok
[INFO] [stdout] test src/specifics/mod.rs - specifics::MonoidRing (line 40) ... ok
[INFO] [stdout] test src/specifics/mod.rs - specifics::FreeAlgebra (line 120) ... ok
[INFO] [stdout] test src/specifics/free_monoid.rs - specifics::free_monoid::FreeMonoid (line 11) ... ok
[INFO] [stdout] test src/specifics/free_group.rs - specifics::free_group::FreeInv<T>::is_inv (line 100) ... ok
[INFO] [stdout] test src/specifics/free_group.rs - specifics::free_group::FreeInv<T>::is_id (line 114) ... ok
[INFO] [stdout] test src/specifics/free_pow.rs - specifics::free_pow::FreePowMonoid (line 11) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 26 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.89s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b1b1c60809484c6c421e91be5bc18a7942adfe5fe016460a9382660fb71bdbdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1b1c60809484c6c421e91be5bc18a7942adfe5fe016460a9382660fb71bdbdd", kill_on_drop: false }`
[INFO] [stdout] b1b1c60809484c6c421e91be5bc18a7942adfe5fe016460a9382660fb71bdbdd
