[INFO] fetching crate syndicate 0.31.1...
[INFO] testing syndicate-0.31.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate syndicate 0.31.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate syndicate 0.31.1 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 syndicate 0.31.1
[INFO] finished tweaking crates.io crate syndicate 0.31.1
[INFO] tweaked toml for crates.io crate syndicate 0.31.1 written to /workspace/builds/worker-2-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] [stderr]     Updating crates.io index
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded preserves v4.992.2
[INFO] [stderr]   Downloaded preserves-schema v5.992.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 00385b9a9bcd56a2a99088d183b4877368ae8a2cb591309412e3087e27d59762
[INFO] running `Command { std: "docker" "start" "-a" "00385b9a9bcd56a2a99088d183b4877368ae8a2cb591309412e3087e27d59762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00385b9a9bcd56a2a99088d183b4877368ae8a2cb591309412e3087e27d59762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00385b9a9bcd56a2a99088d183b4877368ae8a2cb591309412e3087e27d59762", kill_on_drop: false }`
[INFO] [stdout] 00385b9a9bcd56a2a99088d183b4877368ae8a2cb591309412e3087e27d59762
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 79a8b427343eb282f1f36eb9d134feab5ccb0e6e5c3c4b41625da63bc068d99f
[INFO] running `Command { std: "docker" "start" "-a" "79a8b427343eb282f1f36eb9d134feab5ccb0e6e5c3c4b41625da63bc068d99f", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling futures-sink v0.3.30
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-complex v0.4.4
[INFO] [stderr]    Compiling dtoa v0.4.8
[INFO] [stderr]    Compiling futures-channel v0.3.30
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling regex-automata v0.4.3
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling futures-io v0.3.30
[INFO] [stderr]    Compiling num v0.4.1
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling regex v1.10.2
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling iana-time-zone v0.1.59
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling chrono v0.4.31
[INFO] [stderr]    Compiling tracing-log v0.1.4
[INFO] [stderr]    Compiling thread_local v1.1.7
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling blake2 v0.10.6
[INFO] [stderr]    Compiling serde_derive v1.0.194
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling tokio v1.35.1
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling pin-project v1.1.3
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling futures-executor v0.3.30
[INFO] [stderr]    Compiling futures v0.3.30
[INFO] [stderr]    Compiling tokio-util v0.6.10
[INFO] [stderr]    Compiling serde_bytes v0.11.14
[INFO] [stderr]    Compiling tracing-serde v0.1.3
[INFO] [stderr]    Compiling preserves v4.992.2
[INFO] [stderr]    Compiling tracing-subscriber v0.2.25
[INFO] [stderr]    Compiling preserves-schema v5.992.0
[INFO] [stderr]    Compiling syndicate v0.31.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(min_specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syndicate` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "79a8b427343eb282f1f36eb9d134feab5ccb0e6e5c3c4b41625da63bc068d99f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79a8b427343eb282f1f36eb9d134feab5ccb0e6e5c3c4b41625da63bc068d99f", kill_on_drop: false }`
[INFO] [stdout] 79a8b427343eb282f1f36eb9d134feab5ccb0e6e5c3c4b41625da63bc068d99f
[INFO] testing syndicate-0.31.1 against beta-2023-12-22 for beta-1.76-1
[INFO] extracting crate syndicate 0.31.1 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate syndicate 0.31.1 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 syndicate 0.31.1
[INFO] finished tweaking crates.io crate syndicate 0.31.1
[INFO] tweaked toml for crates.io crate syndicate 0.31.1 written to /workspace/builds/worker-2-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] [stderr]     Updating crates.io index
[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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2cdd97217c211a3b3ba78dd7aee04551e62b7c9113640db29397b37f5f284541
[INFO] running `Command { std: "docker" "start" "-a" "2cdd97217c211a3b3ba78dd7aee04551e62b7c9113640db29397b37f5f284541", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2cdd97217c211a3b3ba78dd7aee04551e62b7c9113640db29397b37f5f284541", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cdd97217c211a3b3ba78dd7aee04551e62b7c9113640db29397b37f5f284541", kill_on_drop: false }`
[INFO] [stdout] 2cdd97217c211a3b3ba78dd7aee04551e62b7c9113640db29397b37f5f284541
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 3297d107b3663035bc7b88a5dd56e9daeca7a7a710f7f980b064ec5f9fa6ec7c
[INFO] running `Command { std: "docker" "start" "-a" "3297d107b3663035bc7b88a5dd56e9daeca7a7a710f7f980b064ec5f9fa6ec7c", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling aho-corasick v1.1.2
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling futures-sink v0.3.30
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling dtoa v0.4.8
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-complex v0.4.4
[INFO] [stderr]    Compiling futures-channel v0.3.30
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling regex-automata v0.4.3
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling futures-io v0.3.30
[INFO] [stderr]    Compiling num v0.4.1
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling regex v1.10.2
[INFO] [stderr]    Compiling glob v0.3.1
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling iana-time-zone v0.1.59
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling chrono v0.4.31
[INFO] [stderr]    Compiling tracing-log v0.1.4
[INFO] [stderr]    Compiling thread_local v1.1.7
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling blake2 v0.10.6
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling hmac v0.12.1
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling serde_derive v1.0.194
[INFO] [stderr]    Compiling thiserror-impl v1.0.56
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling thiserror v1.0.56
[INFO] [stderr]    Compiling tokio v1.35.1
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling pin-project v1.1.3
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling futures-executor v0.3.30
[INFO] [stderr]    Compiling futures v0.3.30
[INFO] [stderr]    Compiling tokio-util v0.6.10
[INFO] [stderr]    Compiling serde_bytes v0.11.14
[INFO] [stderr]    Compiling tracing-serde v0.1.3
[INFO] [stderr]    Compiling preserves v4.992.2
[INFO] [stderr]    Compiling tracing-subscriber v0.2.25
[INFO] [stderr]    Compiling preserves-schema v5.992.0
[INFO] [stderr]    Compiling syndicate v0.31.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(min_specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syndicate` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "3297d107b3663035bc7b88a5dd56e9daeca7a7a710f7f980b064ec5f9fa6ec7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3297d107b3663035bc7b88a5dd56e9daeca7a7a710f7f980b064ec5f9fa6ec7c", kill_on_drop: false }`
[INFO] [stdout] 3297d107b3663035bc7b88a5dd56e9daeca7a7a710f7f980b064ec5f9fa6ec7c
