[INFO] fetching crate futures-bufio 0.2.0...
[INFO] checking futures-bufio-0.2.0 against 1.55.0 for beta-1.56-3
[INFO] extracting crate futures-bufio 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate futures-bufio 0.2.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-bufio 0.2.0
[INFO] finished tweaking crates.io crate futures-bufio 0.2.0
[INFO] tweaked toml for crates.io crate futures-bufio 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a18b45f464135aa171cfb9ff03e588e293947ae198a8e4714f54e6644926569a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a18b45f464135aa171cfb9ff03e588e293947ae198a8e4714f54e6644926569a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a18b45f464135aa171cfb9ff03e588e293947ae198a8e4714f54e6644926569a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a18b45f464135aa171cfb9ff03e588e293947ae198a8e4714f54e6644926569a", kill_on_drop: false }`
[INFO] [stdout] a18b45f464135aa171cfb9ff03e588e293947ae198a8e4714f54e6644926569a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0028e298c10f5e357a9098515d088e02a94892f847c66b48aac37ecce7afaed1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0028e298c10f5e357a9098515d088e02a94892f847c66b48aac37ecce7afaed1", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-bufio v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(conservative_impl_trait)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/read.rs:211:52
[INFO] [stdout]     |
[INFO] [stdout] 211 |         let r = mem::replace(&mut self.inner, mem::uninitialized());
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/read.rs:212:52
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let buf = mem::replace(&mut self.buf, mem::uninitialized());
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/read.rs:213:58
[INFO] [stdout]     |
[INFO] [stdout] 213 |         let mut pool = mem::replace(&mut self.pool, mem::uninitialized());
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/write.rs:158:52
[INFO] [stdout]     |
[INFO] [stdout] 158 |         let w = mem::replace(&mut self.inner, mem::uninitialized());
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/write.rs:159:52
[INFO] [stdout]     |
[INFO] [stdout] 159 |         let buf = mem::replace(&mut self.buf, mem::uninitialized());
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/write.rs:160:58
[INFO] [stdout]     |
[INFO] [stdout] 160 |         let mut pool = mem::replace(&mut self.pool, mem::uninitialized());
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(conservative_impl_trait)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/read.rs:211:52
[INFO] [stdout]     |
[INFO] [stdout] 211 |         let r = mem::replace(&mut self.inner, mem::uninitialized());
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/read.rs:212:52
[INFO] [stdout]     |
[INFO] [stdout] 212 |         let buf = mem::replace(&mut self.buf, mem::uninitialized());
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/read.rs:213:58
[INFO] [stdout]     |
[INFO] [stdout] 213 |         let mut pool = mem::replace(&mut self.pool, mem::uninitialized());
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/write.rs:158:52
[INFO] [stdout]     |
[INFO] [stdout] 158 |         let w = mem::replace(&mut self.inner, mem::uninitialized());
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/write.rs:159:52
[INFO] [stdout]     |
[INFO] [stdout] 159 |         let buf = mem::replace(&mut self.buf, mem::uninitialized());
[INFO] [stdout]     |                                                    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::mem::uninitialized`: use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/write.rs:160:58
[INFO] [stdout]     |
[INFO] [stdout] 160 |         let mut pool = mem::replace(&mut self.pool, mem::uninitialized());
[INFO] [stdout]     |                                                          ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-bufio` due to 2 previous errors; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0028e298c10f5e357a9098515d088e02a94892f847c66b48aac37ecce7afaed1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0028e298c10f5e357a9098515d088e02a94892f847c66b48aac37ecce7afaed1", kill_on_drop: false }`
[INFO] [stdout] 0028e298c10f5e357a9098515d088e02a94892f847c66b48aac37ecce7afaed1
