[INFO] fetching crate daab 0.4.0...
[INFO] checking daab-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate daab 0.4.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate daab 0.4.0
[INFO] finished tweaking crates.io crate daab 0.4.0
[INFO] tweaked toml for crates.io crate daab 0.4.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate daab 0.4.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate daab 0.4.0 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87acbd0835f835e85e9481ee0462ea872fa9f673871f9afee454ec4acb4d3432
[INFO] running `Command { std: "docker" "start" "-a" "87acbd0835f835e85e9481ee0462ea872fa9f673871f9afee454ec4acb4d3432", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87acbd0835f835e85e9481ee0462ea872fa9f673871f9afee454ec4acb4d3432", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87acbd0835f835e85e9481ee0462ea872fa9f673871f9afee454ec4acb4d3432", kill_on_drop: false }`
[INFO] [stdout] 87acbd0835f835e85e9481ee0462ea872fa9f673871f9afee454ec4acb4d3432
[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 -Dunmustuse_in_always_ok" "-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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee9c3769b569c8bce859641e0de5a7e824f3d83893c59ba018e5f285bd9d416b
[INFO] running `Command { std: "docker" "start" "-a" "ee9c3769b569c8bce859641e0de5a7e824f3d83893c59ba018e5f285bd9d416b", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking never v0.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking daab v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stdout] warning: method `builder_ptr` is never used
[INFO] [stdout]    --> src/blueprint.rs:167:16
[INFO] [stdout]     |
[INFO] [stdout] 150 | impl<B, BCan: Can<B>> Blueprint<B, BCan> {
[INFO] [stdout]     | ---------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 167 |     pub(crate) fn builder_ptr(&self) -> *const () {
[INFO] [stdout]     |                   ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `BuilderDyn` is never used
[INFO] [stdout]    --> src/blueprint.rs:562:6
[INFO] [stdout]     |
[INFO] [stdout] 562 | type BuilderDyn<ArtCan, BCan, Artifact, Err, DynState> = dyn Builder<ArtCan, BCan, Artifact=Artifact, Err=Err, DynState=DynState>;
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `builder_ptr` is never used
[INFO] [stdout]    --> src/blueprint.rs:674:16
[INFO] [stdout]     |
[INFO] [stdout] 654 | / impl<ArtCan, BCan, Art, Err, DynSt> BlueprintDyn<ArtCan, BCan, Art, Err, DynSt>
[INFO] [stdout] 655 | |     where
[INFO] [stdout] 656 | |         BCan: Can<dyn Builder<ArtCan, BCan, Artifact=Art, Err=Err, DynState=DynSt>>, {
[INFO] [stdout]     | |____________________________________________________________________________________- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 674 |       pub(crate) fn builder_ptr(&self) -> *const () {
[INFO] [stdout]     |                     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `lookup_mut`, `get_mut`, and `invalidate_dependents` are never used
[INFO] [stdout]    --> src/cache/internal.rs:367:16
[INFO] [stdout]     |
[INFO] [stdout] 219 | / impl<ArtCan, BCan> RawCache<ArtCan, BCan>
[INFO] [stdout] 220 | |         where
[INFO] [stdout] 221 | |             ArtCan: Debug,
[INFO] [stdout] 222 | |             BCan: CanStrong {
[INFO] [stdout]     | |___________________________- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 367 |       pub(crate) fn lookup_mut<AP, B: ?Sized>(
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 555 |       pub(crate) fn get_mut<AP, B: ?Sized>(
[INFO] [stdout]     |                     ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 850 |       fn invalidate_dependents(&mut self, builder: &BuilderId) {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a type alias
[INFO] [stdout]   --> src/rc.rs:57:1
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub type ConstBuilder<T> = crate::utils::ConstBuilder<CanType, BuilderCan, BinType<T>, T>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![warn(missing_docs)]
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a type alias
[INFO] [stdout]   --> src/rc.rs:58:1
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub type ConfigurableBuilder<T> = crate::utils::ConfigurableBuilder<CanType, BuilderCan, T>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Rc<<B as rc::SimpleBuilder>::Artifact>, Never>
[INFO] [stdout]    --> src/rc.rs:154:46
[INFO] [stdout]     |
[INFO] [stdout] 154 |               -> Result<BinType<Self::Artifact>, Never> {
[INFO] [stdout]     |  _______________________________________________________^
[INFO] [stdout] 155 | |
[INFO] [stdout] 156 | |         Ok(BinType::new(self.build(cache)))
[INFO] [stdout] 157 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Rc<<B as rc::SimpleBuilder>::Artifact>, Never>
[INFO] [stdout]    --> src/rc.rs:156:3
[INFO] [stdout]     |
[INFO] [stdout] 156 |         Ok(BinType::new(self.build(cache)))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a type alias
[INFO] [stdout]   --> src/arc.rs:57:1
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub type ConstBuilder<T> = crate::utils::ConstBuilder<CanType, BuilderCan, BinType<T>, T>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a type alias
[INFO] [stdout]   --> src/arc.rs:58:1
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub type ConfigurableBuilder<T> = crate::utils::ConfigurableBuilder<CanType, BuilderCan, T>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Arc<<B as arc::SimpleBuilder>::Artifact>, Never>
[INFO] [stdout]    --> src/arc.rs:148:82
[INFO] [stdout]     |
[INFO] [stdout] 148 |       fn build(&self, cache: &mut Resolver) -> Result<BinType<Self::Artifact>, Never> {
[INFO] [stdout]     |  _____________________________________________________________________________________^
[INFO] [stdout] 149 | |         Ok(BinType::new(self.build(cache)))
[INFO] [stdout] 150 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Arc<<B as arc::SimpleBuilder>::Artifact>, Never>
[INFO] [stdout]    --> src/arc.rs:149:3
[INFO] [stdout]     |
[INFO] [stdout] 149 |         Ok(BinType::new(self.build(cache)))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a type alias
[INFO] [stdout]   --> src/boxed.rs:59:1
[INFO] [stdout]    |
[INFO] [stdout] 59 | pub type ConstBuilder<T> = crate::utils::ConstBuilder<CanType, BuilderCan, BinType<T>, T>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for a type alias
[INFO] [stdout]   --> src/boxed.rs:60:1
[INFO] [stdout]    |
[INFO] [stdout] 60 | pub type ConfigurableBuilder<T> = crate::utils::ConfigurableBuilder<CanType, BuilderCan, T>;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Box<<B as boxed::SimpleBuilder>::Artifact>, Never>
[INFO] [stdout]    --> src/boxed.rs:121:46
[INFO] [stdout]     |
[INFO] [stdout] 121 |               -> Result<BinType<Self::Artifact>, Never> {
[INFO] [stdout]     |  _______________________________________________________^
[INFO] [stdout] 122 | |
[INFO] [stdout] 123 | |         Ok(BinType::new(self.build(cache)))
[INFO] [stdout] 124 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Box<<B as boxed::SimpleBuilder>::Artifact>, Never>
[INFO] [stdout]    --> src/boxed.rs:123:3
[INFO] [stdout]     |
[INFO] [stdout] 123 |         Ok(BinType::new(self.build(cache)))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated type
[INFO] [stdout]   --> src/blueprint.rs:80:2
[INFO] [stdout]    |
[INFO] [stdout] 80 |     type Builder: ?Sized + 'static + Debug;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for an associated type
[INFO] [stdout]   --> src/blueprint.rs:81:2
[INFO] [stdout]    |
[INFO] [stdout] 81 |     type BCan: Can<Self::Builder>;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/blueprint.rs:97:13
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn builder(&self) -> BuilderAccessor<Self::Builder>;
[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] 97 |     fn builder(&self) -> BuilderAccessor<'_, Self::Builder>;
[INFO] [stdout]    |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/blueprint.rs:197:13
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn builder(&self) -> BuilderAccessor<B> {
[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] 197 |     fn builder(&self) -> BuilderAccessor<'_, B> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/blueprint.rs:717:13
[INFO] [stdout]     |
[INFO] [stdout] 717 |     fn builder(&self) -> BuilderAccessor<dyn Builder<ArtCan, BCan, Artifact=Art, Err=Err, DynState=DynSt>> {
[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] 717 |     fn builder(&self) -> BuilderAccessor<'_, dyn Builder<ArtCan, BCan, Artifact=Art, Err=Err, DynState=DynSt>> {
[INFO] [stdout]     |                                          +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<<ArtCan as Can<T>>::Bin, Never>
[INFO] [stdout]    --> src/utils.rs:499:35
[INFO] [stdout]     |
[INFO] [stdout] 499 |                -> Result<ArtCan::Bin, Never> {
[INFO] [stdout]     |  ____________________________________________^
[INFO] [stdout] 500 | |
[INFO] [stdout] 501 | |         Ok(ArtCan::into_bin(resolver.my_state().clone()))
[INFO] [stdout] 502 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<<ArtCan as Can<T>>::Bin, Never>
[INFO] [stdout]    --> src/utils.rs:501:3
[INFO] [stdout]     |
[INFO] [stdout] 501 |         Ok(ArtCan::into_bin(resolver.my_state().clone()))
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<<ArtCan as Can<<B as Builder<ArtCan, BCan>>::Artifact>>::Bin, Never>
[INFO] [stdout]    --> src/utils.rs:700:3
[INFO] [stdout]     |
[INFO] [stdout] 700 |         resolver.resolve(&self.inner).map_err(|n| n.into_any())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `daab` (lib) due to 9 previous errors; 15 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ee9c3769b569c8bce859641e0de5a7e824f3d83893c59ba018e5f285bd9d416b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee9c3769b569c8bce859641e0de5a7e824f3d83893c59ba018e5f285bd9d416b", kill_on_drop: false }`
[INFO] [stdout] ee9c3769b569c8bce859641e0de5a7e824f3d83893c59ba018e5f285bd9d416b