[INFO] fetching crate dynec-codegen 0.2.0-alpha.1...
[INFO] testing dynec-codegen-0.2.0-alpha.1 against 1.75.0 for beta-1.76-1
[INFO] extracting crate dynec-codegen 0.2.0-alpha.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate dynec-codegen 0.2.0-alpha.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 dynec-codegen 0.2.0-alpha.1
[INFO] finished tweaking crates.io crate dynec-codegen 0.2.0-alpha.1
[INFO] tweaked toml for crates.io crate dynec-codegen 0.2.0-alpha.1 written to /workspace/builds/worker-6-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded matches2 v1.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 54dc2bee73aac61a18f64d661cbf35bab4731345e014d44d2d08c843d1dde21c
[INFO] running `Command { std: "docker" "start" "-a" "54dc2bee73aac61a18f64d661cbf35bab4731345e014d44d2d08c843d1dde21c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54dc2bee73aac61a18f64d661cbf35bab4731345e014d44d2d08c843d1dde21c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54dc2bee73aac61a18f64d661cbf35bab4731345e014d44d2d08c843d1dde21c", kill_on_drop: false }`
[INFO] [stdout] 54dc2bee73aac61a18f64d661cbf35bab4731345e014d44d2d08c843d1dde21c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 38d098a320bd9e0ca8ba40059fb09d207b22b22df8bc21b38e76bec2bfe78f8c
[INFO] running `Command { std: "docker" "start" "-a" "38d098a320bd9e0ca8ba40059fb09d207b22b22df8bc21b38e76bec2bfe78f8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling matches2 v1.2.1
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling dynec-codegen v0.2.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `drain_filter`
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for struct `Vec<Attribute>` in the current scope
[INFO] [stdout]    --> src/system/arg.rs:150:29
[INFO] [stdout]     |
[INFO] [stdout] 150 |     for attr in param.attrs.drain_filter(|attr| attr.path.is_ident("dynec")) {
[INFO] [stdout]     |                             ^^^^^^^^^^^^ method not found in `Vec<Attribute>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `drain_filter` found for mutable reference `&mut Vec<Attribute>` in the current scope
[INFO] [stdout]    --> src/util.rs:134:10
[INFO] [stdout]     |
[INFO] [stdout] 133 | /     attrs
[INFO] [stdout] 134 | |         .drain_filter(|attr| attr.path.is_ident("dynec"))
[INFO] [stdout]     | |         -^^^^^^^^^^^^ method not found in `&mut Vec<Attribute>`
[INFO] [stdout]     | |_________|
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dynec-codegen` (lib) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "38d098a320bd9e0ca8ba40059fb09d207b22b22df8bc21b38e76bec2bfe78f8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38d098a320bd9e0ca8ba40059fb09d207b22b22df8bc21b38e76bec2bfe78f8c", kill_on_drop: false }`
[INFO] [stdout] 38d098a320bd9e0ca8ba40059fb09d207b22b22df8bc21b38e76bec2bfe78f8c
