[INFO] fetching crate mutable 0.2.8...
[INFO] checking mutable-0.2.8 against master#bbe853615821442ef11d6cd42a30a73432b38d89 for pr-154205
[INFO] extracting crate mutable 0.2.8 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate mutable 0.2.8
[INFO] finished tweaking crates.io crate mutable 0.2.8
[INFO] tweaked toml for crates.io crate mutable 0.2.8 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mutable 0.2.8 on toolchain bbe853615821442ef11d6cd42a30a73432b38d89
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "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" "+bbe853615821442ef11d6cd42a30a73432b38d89" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 20 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.114
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.114
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.114
[INFO] [stderr]   Downloaded proc-macro-error-attr v1.0.4
[INFO] [stderr]   Downloaded mutable_derive v0.3.3
[INFO] [stderr]   Downloaded convert_case v0.5.0
[INFO] [stderr]   Downloaded proc-macro-error v1.0.4
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.114
[INFO] [stderr]   Downloaded uuid v1.22.0
[INFO] [stderr]   Downloaded js-sys v0.3.91
[INFO] [stderr]   Downloaded bumpalo v3.20.2
[INFO] [stderr]   Downloaded syn v1.0.109
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9780ba64555d9aa0cbe7c0a19a43cc0000ec70f7e3b864d4504e3cca2e9b43dc
[INFO] running `Command { std: "docker" "start" "-a" "9780ba64555d9aa0cbe7c0a19a43cc0000ec70f7e3b864d4504e3cca2e9b43dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9780ba64555d9aa0cbe7c0a19a43cc0000ec70f7e3b864d4504e3cca2e9b43dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9780ba64555d9aa0cbe7c0a19a43cc0000ec70f7e3b864d4504e3cca2e9b43dc", kill_on_drop: false }`
[INFO] [stdout] 9780ba64555d9aa0cbe7c0a19a43cc0000ec70f7e3b864d4504e3cca2e9b43dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03040d99a34569f8346a3f8c9defbd881b3da57c603f1a9ee9a4fc5a19bf43bd
[INFO] running `Command { std: "docker" "start" "-a" "03040d99a34569f8346a3f8c9defbd881b3da57c603f1a9ee9a4fc5a19bf43bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling unicode-ident v1.0.24
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling convert_case v0.5.0
[INFO] [stderr]     Checking uuid v1.22.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling mutable_derive v0.3.3
[INFO] [stderr]     Checking mutable v0.2.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `softeq::*`
[INFO] [stdout]  --> src/default_impl/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use softeq::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/holder.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn get_mut(&mut self) -> MHRefMut<M> { MHRefMut(self) }
[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] 51 |     pub fn get_mut(&mut self) -> MHRefMut<'_, M> { MHRefMut(self) }
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `softeq::*`
[INFO] [stdout]  --> src/default_impl/mod.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub use softeq::*;
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/holder.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 |     pub fn get_mut(&mut self) -> MHRefMut<M> { MHRefMut(self) }
[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] 51 |     pub fn get_mut(&mut self) -> MHRefMut<'_, M> { MHRefMut(self) }
[INFO] [stdout]    |                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.02s
[INFO] running `Command { std: "docker" "inspect" "03040d99a34569f8346a3f8c9defbd881b3da57c603f1a9ee9a4fc5a19bf43bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03040d99a34569f8346a3f8c9defbd881b3da57c603f1a9ee9a4fc5a19bf43bd", kill_on_drop: false }`
[INFO] [stdout] 03040d99a34569f8346a3f8c9defbd881b3da57c603f1a9ee9a4fc5a19bf43bd