[INFO] crate fahrenheit 4.5.2 is already in cache
[INFO] extracting crate fahrenheit 4.5.2 into work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/reg/fahrenheit/4.5.2
[INFO] extracting crate fahrenheit 4.5.2 into work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/reg/fahrenheit/4.5.2
[INFO] validating manifest of fahrenheit-4.5.2 on toolchain master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of fahrenheit-4.5.2 on toolchain try#26f8d250bb3c8a85e812cf663c730ef9e0df9315
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+26f8d250bb3c8a85e812cf663c730ef9e0df9315-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing fahrenheit-4.5.2
[INFO] finished frobbing fahrenheit-4.5.2
[INFO] frobbed toml for fahrenheit-4.5.2 written to work/ex/pr-57609/sources/master#03acbd71c977cd63ce5f39ba9b6fe9ffd578785a/reg/fahrenheit/4.5.2/Cargo.toml
[INFO] started frobbing fahrenheit-4.5.2
[INFO] finished frobbing fahrenheit-4.5.2
[INFO] frobbed toml for fahrenheit-4.5.2 written to work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/reg/fahrenheit/4.5.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+26f8d250bb3c8a85e812cf663c730ef9e0df9315-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+03acbd71c977cd63ce5f39ba9b6fe9ffd578785a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+26f8d250bb3c8a85e812cf663c730ef9e0df9315-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking fahrenheit-4.5.2 against try#26f8d250bb3c8a85e812cf663c730ef9e0df9315 for pr-57609
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57609/worker-6/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57609/sources/try#26f8d250bb3c8a85e812cf663c730ef9e0df9315/reg/fahrenheit/4.5.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+26f8d250bb3c8a85e812cf663c730ef9e0df9315-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f1cdc7e0d74358129162a5aa8e6c73828a7822003e5fe5100255c558d7b69529
[INFO] running `"docker" "start" "-a" "f1cdc7e0d74358129162a5aa8e6c73828a7822003e5fe5100255c558d7b69529"`
[INFO] [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr]    Compiling proc-macro-hack v0.5.4
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.12
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.12
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.12
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.12
[INFO] [stderr]     Checking fahrenheit v4.5.2 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `handle`
[INFO] [stderr]    --> src/lib.rs:117:5
[INFO] [stderr]     |
[INFO] [stderr] 117 |     pub fn handle(&self) -> Handle {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `pin` has been stable since 1.33.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:25
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(futures_api, pin, async_await, await_macro, arbitrary_self_types)]
[INFO] [stderr]   |                         ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `handle`
[INFO] [stderr]    --> src/lib.rs:117:5
[INFO] [stderr]     |
[INFO] [stderr] 117 |     pub fn handle(&self) -> Handle {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `pin` has been stable since 1.33.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:1:25
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(futures_api, pin, async_await, await_macro, arbitrary_self_types)]
[INFO] [stderr]   |                         ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> examples/server.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     await!(stream.read_exact(&mut buf));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.96s
[INFO] running `"docker" "inspect" "f1cdc7e0d74358129162a5aa8e6c73828a7822003e5fe5100255c558d7b69529"`
[INFO] running `"docker" "rm" "-f" "f1cdc7e0d74358129162a5aa8e6c73828a7822003e5fe5100255c558d7b69529"`
[INFO] [stdout] f1cdc7e0d74358129162a5aa8e6c73828a7822003e5fe5100255c558d7b69529