[INFO] fetching crate futures-await-async-macro 0.1.4...
[INFO] testing futures-await-async-macro-0.1.4 against 1.54.0 for beta-1.55-1
[INFO] extracting crate futures-await-async-macro 0.1.4 into /workspace/builds/worker-18/source
[INFO] validating manifest of crates.io crate futures-await-async-macro 0.1.4 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-18/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2001ee6f705d0a750c4bc412bc61feef6a5ca1acb762f54c567568b829c40867
[INFO] running `Command { std: "docker" "start" "-a" "2001ee6f705d0a750c4bc412bc61feef6a5ca1acb762f54c567568b829c40867", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2001ee6f705d0a750c4bc412bc61feef6a5ca1acb762f54c567568b829c40867", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2001ee6f705d0a750c4bc412bc61feef6a5ca1acb762f54c567568b829c40867", kill_on_drop: false }`
[INFO] [stdout] 2001ee6f705d0a750c4bc412bc61feef6a5ca1acb762f54c567568b829c40867
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4df8ac659f89d782f3fbeef19214aeb05f5ae6db214a35f15b8ad21b5e53a32
[INFO] running `Command { std: "docker" "start" "-a" "f4df8ac659f89d782f3fbeef19214aeb05f5ae6db214a35f15b8ad21b5e53a32", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[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] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![feature(proc_macro)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `proc_macro` has been stable since 1.29.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]   --> src/lib.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | #[macro_use]
[INFO] [stdout]    | ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:466:24
[INFO] [stdout]     |
[INFO] [stdout] 466 | fn first_last(tokens: &ToTokens) -> (Span, Span) {
[INFO] [stdout]     |                        ^^^^^^^^ help: use `dyn`: `dyn ToTokens`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:494:59
[INFO] [stdout]     |
[INFO] [stdout] 494 | fn replace_bang(input: proc_macro2::TokenStream, tokens: &ToTokens) -> proc_macro2::TokenStream {
[INFO] [stdout]     |                                                           ^^^^^^^^ help: use `dyn`: `dyn ToTokens`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:507:19
[INFO] [stdout]     |
[INFO] [stdout] 507 |     replacements: &[&ToTokens],
[INFO] [stdout]     |                      ^^^^^^^^ help: use `dyn`: `dyn ToTokens`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `proc_macro2::TokenStream::empty`: please use TokenStream::new
[INFO] [stdout]    --> src/lib.rs:175:27
[INFO] [stdout]     |
[INFO] [stdout] 175 |     let mut result = Tokens::empty();
[INFO] [stdout]     |                              ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `proc_macro2::TokenStream::empty`: please use TokenStream::new
[INFO] [stdout]    --> src/lib.rs:192:29
[INFO] [stdout]     |
[INFO] [stdout] 192 |     let mut gen_body = Tokens::empty();
[INFO] [stdout]     |                                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `proc_macro2::TokenStream::empty`: please use TokenStream::new
[INFO] [stdout]    --> src/lib.rs:211:25
[INFO] [stdout]     |
[INFO] [stdout] 211 |     let mut body = Tokens::empty();
[INFO] [stdout]     |                            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `proc_macro2::TokenStream::empty`: please use TokenStream::new
[INFO] [stdout]    --> src/lib.rs:467:26
[INFO] [stdout]     |
[INFO] [stdout] 467 |     let mut spans = Tokens::empty();
[INFO] [stdout]     |                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-await-async-macro`
[INFO] [stdout] warning: use of deprecated associated function `proc_macro2::TokenStream::empty`: please use TokenStream::new
[INFO] [stdout]    --> src/lib.rs:495:31
[INFO] [stdout]     |
[INFO] [stdout] 495 |     let mut new_tokens = Tokens::empty();
[INFO] [stdout]     |                                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] warning: use of deprecated associated function `proc_macro2::TokenStream::empty`: please use TokenStream::new
[INFO] [stdout]    --> src/lib.rs:510:31
[INFO] [stdout]     |
[INFO] [stdout] 510 |     let mut new_tokens = Tokens::empty();
[INFO] [stdout]     |                                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] error: aborting due to previous error; 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f4df8ac659f89d782f3fbeef19214aeb05f5ae6db214a35f15b8ad21b5e53a32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4df8ac659f89d782f3fbeef19214aeb05f5ae6db214a35f15b8ad21b5e53a32", kill_on_drop: false }`
[INFO] [stdout] f4df8ac659f89d782f3fbeef19214aeb05f5ae6db214a35f15b8ad21b5e53a32
