[INFO] fetching crate microcrates-bytes 0.4.8...
[INFO] testing microcrates-bytes-0.4.8 against 1.44.0 for beta-1.45-1
[INFO] extracting crate microcrates-bytes 0.4.8 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate microcrates-bytes 0.4.8 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate microcrates-bytes 0.4.8
[INFO] finished tweaking crates.io crate microcrates-bytes 0.4.8
[INFO] tweaked toml for crates.io crate microcrates-bytes 0.4.8 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fe6c4eea59b929a6a32fcc29f2cbf800389d4e8e52943ebf51ba8b63ba2b44b0
[INFO] running `"docker" "start" "-a" "fe6c4eea59b929a6a32fcc29f2cbf800389d4e8e52943ebf51ba8b63ba2b44b0"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling microcrates-bytes v0.4.8 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:74:34
[INFO] [stderr]    |
[INFO] [stderr] 74 | #![cfg_attr(feature = "nightly", feature(alloc, read_initializer, try_from))]
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/debug.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |         try!(write!(fmt, "b\""));
[INFO] [stderr]    |         ^^^
[INFO] [stderr]    |
[INFO] [stderr] note: the lint level is defined here
[INFO] [stderr]   --> src/lib.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 | #![deny(warnings, missing_docs, missing_debug_implementations)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: `#[warn(deprecated)]` implied by `#[warn(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/debug.rs:21:17
[INFO] [stderr]    |
[INFO] [stderr] 21 |                 try!(write!(fmt, "\\n"));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/debug.rs:23:17
[INFO] [stderr]    |
[INFO] [stderr] 23 |                 try!(write!(fmt, "\\r"));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/debug.rs:25:17
[INFO] [stderr]    |
[INFO] [stderr] 25 |                 try!(write!(fmt, "\\t"));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/debug.rs:27:17
[INFO] [stderr]    |
[INFO] [stderr] 27 |                 try!(write!(fmt, "\\{}", c as char));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/debug.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |                 try!(write!(fmt, "\\0"));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/debug.rs:32:17
[INFO] [stderr]    |
[INFO] [stderr] 32 |                 try!(write!(fmt, "{}", c as char));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/debug.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |                 try!(write!(fmt, "\\x{:02x}", c));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/debug.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         try!(write!(fmt, "\""));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/bytes.rs:1550:40
[INFO] [stderr]      |
[INFO] [stderr] 1550 |                 let mut inner: Inner = mem::uninitialized();
[INFO] [stderr]      |                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/bytes.rs:1736:40
[INFO] [stderr]      |
[INFO] [stderr] 1736 |                 let mut inner: Inner = mem::uninitialized();
[INFO] [stderr]      |                                        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]     --> src/bytes.rs:2012:36
[INFO] [stderr]      |
[INFO] [stderr] 2012 |             let mut inner: Inner = mem::uninitialized();
[INFO] [stderr]      |                                    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `microcrates-bytes`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "fe6c4eea59b929a6a32fcc29f2cbf800389d4e8e52943ebf51ba8b63ba2b44b0"`
[INFO] running `"docker" "rm" "-f" "fe6c4eea59b929a6a32fcc29f2cbf800389d4e8e52943ebf51ba8b63ba2b44b0"`
[INFO] [stdout] fe6c4eea59b929a6a32fcc29f2cbf800389d4e8e52943ebf51ba8b63ba2b44b0