[INFO] crate futures-await-async-macro 0.1.4 is already in cache
[INFO] testing futures-await-async-macro-0.1.4 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate futures-await-async-macro 0.1.4 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate futures-await-async-macro 0.1.4 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate futures-await-async-macro 0.1.4
[INFO] finished tweaking crates.io crate futures-await-async-macro 0.1.4
[INFO] tweaked toml for crates.io crate futures-await-async-macro 0.1.4 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+beta-2020-06-03" "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] 738cd13fda627f804287e3e2518860cf07a542237bfb83ffe5e89328519ada9f
[INFO] running `"docker" "start" "-a" "738cd13fda627f804287e3e2518860cf07a542237bfb83ffe5e89328519ada9f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling futures-await-async-macro v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(proc_macro)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:466:24
[INFO] [stderr]     |
[INFO] [stderr] 466 | fn first_last(tokens: &ToTokens) -> (Span, Span) {
[INFO] [stderr]     |                        ^^^^^^^^ help: use `dyn`: `dyn ToTokens`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:494:59
[INFO] [stderr]     |
[INFO] [stderr] 494 | fn replace_bang(input: proc_macro2::TokenStream, tokens: &ToTokens) -> proc_macro2::TokenStream {
[INFO] [stderr]     |                                                           ^^^^^^^^ help: use `dyn`: `dyn ToTokens`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:507:19
[INFO] [stderr]     |
[INFO] [stderr] 507 |     replacements: &[&ToTokens],
[INFO] [stderr]     |                      ^^^^^^^^ help: use `dyn`: `dyn ToTokens`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'proc_macro2::TokenStream::empty': please use TokenStream::new
[INFO] [stderr]    --> src/lib.rs:175:19
[INFO] [stderr]     |
[INFO] [stderr] 175 |     let mut result = Tokens::empty();
[INFO] [stderr]     |                      ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'proc_macro2::TokenStream::empty': please use TokenStream::new
[INFO] [stderr]    --> src/lib.rs:192:21
[INFO] [stderr]     |
[INFO] [stderr] 192 |     let mut gen_body = Tokens::empty();
[INFO] [stderr]     |                        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'proc_macro2::TokenStream::empty': please use TokenStream::new
[INFO] [stderr]    --> src/lib.rs:211:17
[INFO] [stderr]     |
[INFO] [stderr] 211 |     let mut body = Tokens::empty();
[INFO] [stderr]     |                    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'proc_macro2::TokenStream::empty': please use TokenStream::new
[INFO] [stderr]    --> src/lib.rs:467:18
[INFO] [stderr]     |
[INFO] [stderr] 467 |     let mut spans = Tokens::empty();
[INFO] [stderr]     |                     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'proc_macro2::TokenStream::empty': please use TokenStream::new
[INFO] [stderr]    --> src/lib.rs:495:23
[INFO] [stderr]     |
[INFO] [stderr] 495 |     let mut new_tokens = Tokens::empty();
[INFO] [stderr]     |                          ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'proc_macro2::TokenStream::empty': please use TokenStream::new
[INFO] [stderr]    --> src/lib.rs:510:23
[INFO] [stderr]     |
[INFO] [stderr] 510 |     let mut new_tokens = Tokens::empty();
[INFO] [stderr]     |                          ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `futures-await-async-macro`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "738cd13fda627f804287e3e2518860cf07a542237bfb83ffe5e89328519ada9f"`
[INFO] running `"docker" "rm" "-f" "738cd13fda627f804287e3e2518860cf07a542237bfb83ffe5e89328519ada9f"`
[INFO] [stdout] 738cd13fda627f804287e3e2518860cf07a542237bfb83ffe5e89328519ada9f