[INFO] fetching crate acon 0.5.2...
[INFO] testing acon-0.5.2 against 1.75.0 for beta-1.76-1
[INFO] extracting crate acon 0.5.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate acon 0.5.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate acon 0.5.2
[INFO] finished tweaking crates.io crate acon 0.5.2
[INFO] tweaked toml for crates.io crate acon 0.5.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32a22892d5abcbe1dee6a0d6f58f9acc4fb0370fea3904122d0096d050641416
[INFO] running `Command { std: "docker" "start" "-a" "32a22892d5abcbe1dee6a0d6f58f9acc4fb0370fea3904122d0096d050641416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32a22892d5abcbe1dee6a0d6f58f9acc4fb0370fea3904122d0096d050641416", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32a22892d5abcbe1dee6a0d6f58f9acc4fb0370fea3904122d0096d050641416", kill_on_drop: false }`
[INFO] [stdout] 32a22892d5abcbe1dee6a0d6f58f9acc4fb0370fea3904122d0096d050641416
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3cb9e5dd76858b040deac16688c393f695999ddda242d15d0ede490d04a8be4f
[INFO] running `Command { std: "docker" "start" "-a" "3cb9e5dd76858b040deac16688c393f695999ddda242d15d0ede490d04a8be4f", kill_on_drop: false }`
[INFO] [stderr]    Compiling acon v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:307:6
[INFO] [stdout]     |
[INFO] [stdout] 307 |                     try!(recurse(key, value, f, 0));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |                 () => { try!(f.write_str("\n")); }
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 335 |                     nl!();
[INFO] [stdout]     |                     ----- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `nl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 331 |                     wrt!("[ ", key, "\n");
[INFO] [stdout]     |                     --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 331 |                     wrt!("[ ", key, "\n");
[INFO] [stdout]     |                     --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:333:7
[INFO] [stdout]     |
[INFO] [stdout] 333 |                         try!(recurse("", value, f, depth + 1));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 336 |                     wrt!("]\n");
[INFO] [stdout]     |                     ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 336 |                     wrt!("]\n");
[INFO] [stdout]     |                     ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 339 |                     wrt!(key, " ", string, "\n");
[INFO] [stdout]     |                     ---------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 339 |                     wrt!(key, " ", string, "\n");
[INFO] [stdout]     |                     ---------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |                 () => { try!(f.write_str("\n")); }
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 346 |                     nl!();
[INFO] [stdout]     |                     ----- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `nl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 342 |                     wrt!("{ ", key, "\n");
[INFO] [stdout]     |                     --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 342 |                     wrt!("{ ", key, "\n");
[INFO] [stdout]     |                     --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:344:7
[INFO] [stdout]     |
[INFO] [stdout] 344 |                         try!(recurse(key, value, f, depth + 1));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 347 |                     wrt!("}\n");
[INFO] [stdout]     |                     ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 347 |                     wrt!("}\n");
[INFO] [stdout]     |                     ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:393:35
[INFO] [stdout]     |
[INFO] [stdout] 393 |                     word @ "}" | word @ "]" => { try!(close_array_or_table(word, &mut stack, current_line)); continue; }
[INFO] [stdout]     |                                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:394:15
[INFO] [stdout]     |
[INFO] [stdout] 394 |                     "$" => { try!(close_all_nestings(&mut stack, current_line)); continue; }
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:407:12
[INFO] [stdout]     |
[INFO] [stdout] 407 |                         => { try!(append_entry_to_top_table(table, &first, &mut words, current_line)); }
[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:110:12
[INFO] [stdout]     |
[INFO] [stdout] 110 | #![feature(test)]
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 18 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 `acon` (lib) due to 2 previous errors; 18 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "3cb9e5dd76858b040deac16688c393f695999ddda242d15d0ede490d04a8be4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3cb9e5dd76858b040deac16688c393f695999ddda242d15d0ede490d04a8be4f", kill_on_drop: false }`
[INFO] [stdout] 3cb9e5dd76858b040deac16688c393f695999ddda242d15d0ede490d04a8be4f
[INFO] testing acon-0.5.2 against beta-2023-12-22 for beta-1.76-1
[INFO] extracting crate acon 0.5.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate acon 0.5.2 on toolchain beta-2023-12-22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate acon 0.5.2
[INFO] finished tweaking crates.io crate acon 0.5.2
[INFO] tweaked toml for crates.io crate acon 0.5.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-12-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fbbcb71a0193f8e0213f62c2cdd9d663003ea4ce5f4a73ca92cde17d9b261b19
[INFO] running `Command { std: "docker" "start" "-a" "fbbcb71a0193f8e0213f62c2cdd9d663003ea4ce5f4a73ca92cde17d9b261b19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fbbcb71a0193f8e0213f62c2cdd9d663003ea4ce5f4a73ca92cde17d9b261b19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbbcb71a0193f8e0213f62c2cdd9d663003ea4ce5f4a73ca92cde17d9b261b19", kill_on_drop: false }`
[INFO] [stdout] fbbcb71a0193f8e0213f62c2cdd9d663003ea4ce5f4a73ca92cde17d9b261b19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-12-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51f97eb5c6859a0aa88eb4318a0b5d4e5fe61980adc368b620ae2570912a4242
[INFO] running `Command { std: "docker" "start" "-a" "51f97eb5c6859a0aa88eb4318a0b5d4e5fe61980adc368b620ae2570912a4242", kill_on_drop: false }`
[INFO] [stderr]    Compiling acon v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:307:6
[INFO] [stdout]     |
[INFO] [stdout] 307 |                     try!(recurse(key, value, f, 0));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |                 () => { try!(f.write_str("\n")); }
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 335 |                     nl!();
[INFO] [stdout]     |                     ----- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `nl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 331 |                     wrt!("[ ", key, "\n");
[INFO] [stdout]     |                     --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 331 |                     wrt!("[ ", key, "\n");
[INFO] [stdout]     |                     --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:333:7
[INFO] [stdout]     |
[INFO] [stdout] 333 |                         try!(recurse("", value, f, depth + 1));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 336 |                     wrt!("]\n");
[INFO] [stdout]     |                     ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 336 |                     wrt!("]\n");
[INFO] [stdout]     |                     ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 339 |                     wrt!(key, " ", string, "\n");
[INFO] [stdout]     |                     ---------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 339 |                     wrt!(key, " ", string, "\n");
[INFO] [stdout]     |                     ---------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:327:13
[INFO] [stdout]     |
[INFO] [stdout] 327 |                 () => { try!(f.write_str("\n")); }
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] ...
[INFO] [stdout] 346 |                     nl!();
[INFO] [stdout]     |                     ----- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `nl` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 342 |                     wrt!("{ ", key, "\n");
[INFO] [stdout]     |                     --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 342 |                     wrt!("{ ", key, "\n");
[INFO] [stdout]     |                     --------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:344:7
[INFO] [stdout]     |
[INFO] [stdout] 344 |                         try!(recurse(key, value, f, depth + 1));
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:321:6
[INFO] [stdout]     |
[INFO] [stdout] 321 |                     try!(f.write_str(&indent));
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] ...
[INFO] [stdout] 347 |                     wrt!("}\n");
[INFO] [stdout]     |                     ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:322:8
[INFO] [stdout]     |
[INFO] [stdout] 322 |                     $(try!(f.write_str($x));)*
[INFO] [stdout]     |                       ^^^
[INFO] [stdout] ...
[INFO] [stdout] 347 |                     wrt!("}\n");
[INFO] [stdout]     |                     ----------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `wrt` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:393:35
[INFO] [stdout]     |
[INFO] [stdout] 393 |                     word @ "}" | word @ "]" => { try!(close_array_or_table(word, &mut stack, current_line)); continue; }
[INFO] [stdout]     |                                                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:394:15
[INFO] [stdout]     |
[INFO] [stdout] 394 |                     "$" => { try!(close_all_nestings(&mut stack, current_line)); continue; }
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:407:12
[INFO] [stdout]     |
[INFO] [stdout] 407 |                         => { try!(append_entry_to_top_table(table, &first, &mut words, current_line)); }
[INFO] [stdout]     |                              ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:110:12
[INFO] [stdout]     |
[INFO] [stdout] 110 | #![feature(test)]
[INFO] [stdout]     |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 18 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 `acon` (lib) due to 2 previous errors; 18 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "51f97eb5c6859a0aa88eb4318a0b5d4e5fe61980adc368b620ae2570912a4242", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51f97eb5c6859a0aa88eb4318a0b5d4e5fe61980adc368b620ae2570912a4242", kill_on_drop: false }`
[INFO] [stdout] 51f97eb5c6859a0aa88eb4318a0b5d4e5fe61980adc368b620ae2570912a4242
