[INFO] fetching crate possibly_uninit 0.1.0-preview...
[INFO] checking possibly_uninit-0.1.0-preview against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] extracting crate possibly_uninit 0.1.0-preview into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate possibly_uninit 0.1.0-preview on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate possibly_uninit 0.1.0-preview
[INFO] finished tweaking crates.io crate possibly_uninit 0.1.0-preview
[INFO] tweaked toml for crates.io crate possibly_uninit 0.1.0-preview written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 50e04e29e7234e1286c9830b019a39f8743010323857b6442ff64e7ae9bbd067
[INFO] running `Command { std: "docker" "start" "-a" "50e04e29e7234e1286c9830b019a39f8743010323857b6442ff64e7ae9bbd067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50e04e29e7234e1286c9830b019a39f8743010323857b6442ff64e7ae9bbd067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50e04e29e7234e1286c9830b019a39f8743010323857b6442ff64e7ae9bbd067", kill_on_drop: false }`
[INFO] [stdout] 50e04e29e7234e1286c9830b019a39f8743010323857b6442ff64e7ae9bbd067
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 549c7562706ad508cc84665fdce2f9bda2a4572d4692867c5219237dd7408636
[INFO] running `Command { std: "docker" "start" "-a" "549c7562706ad508cc84665fdce2f9bda2a4572d4692867c5219237dd7408636", kill_on_drop: false }`
[INFO] [stderr]     Checking possibly_uninit v0.1.0-preview (/opt/rustwide/workdir)
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:126:20
[INFO] [stdout]     |
[INFO] [stdout] 126 |             self.0.assume_init_mut()
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this method is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `BorrowUninitMut::assume_init_mut(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(maybe_uninit_ref)]` to the crate attributes to enable `MaybeUninit::<T>::assume_init_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:138:20
[INFO] [stdout]     |
[INFO] [stdout] 138 |             self.0.assume_init_mut()
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this method is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `BorrowUninitMut::assume_init_mut(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(maybe_uninit_ref)]` to the crate attributes to enable `MaybeUninit::<T>::assume_init_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:126:20
[INFO] [stdout]     |
[INFO] [stdout] 126 |             self.0.assume_init_mut()
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unstable_name_collisions)]` on by default
[INFO] [stdout]     = warning: once this method is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `BorrowUninitMut::assume_init_mut(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(maybe_uninit_ref)]` to the crate attributes to enable `MaybeUninit::<T>::assume_init_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/lib.rs:138:20
[INFO] [stdout]     |
[INFO] [stdout] 138 |             self.0.assume_init_mut()
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this method is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `BorrowUninitMut::assume_init_mut(...)` to keep using the current method
[INFO] [stdout]     = help: add `#![feature(maybe_uninit_ref)]` to the crate attributes to enable `MaybeUninit::<T>::assume_init_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `Command { std: "docker" "inspect" "549c7562706ad508cc84665fdce2f9bda2a4572d4692867c5219237dd7408636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "549c7562706ad508cc84665fdce2f9bda2a4572d4692867c5219237dd7408636", kill_on_drop: false }`
[INFO] [stdout] 549c7562706ad508cc84665fdce2f9bda2a4572d4692867c5219237dd7408636