[INFO] fetching crate chrometracer 0.1.1...
[INFO] checking chrometracer-0.1.1 against 1.95.0 for pr-155915
[INFO] extracting crate chrometracer 0.1.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate chrometracer 0.1.1
[INFO] finished tweaking crates.io crate chrometracer 0.1.1
[INFO] tweaked toml for crates.io crate chrometracer 0.1.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate chrometracer 0.1.1 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 69 packages to latest compatible versions
[INFO] [stderr]       Adding derive_builder v0.11.2 (available: v0.20.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded darling_core v0.14.4
[INFO] [stderr]   Downloaded chrometracer-attributes v0.1.1
[INFO] [stderr]   Downloaded darling v0.14.4
[INFO] [stderr]   Downloaded darling_macro v0.14.4
[INFO] [stderr]   Downloaded tracing-chrometrace v0.1.19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 35bb943a6263785a2f8038824470ddc65b74edc9365eb05118fd5a35f911a9f6
[INFO] running `Command { std: "docker" "start" "-a" "35bb943a6263785a2f8038824470ddc65b74edc9365eb05118fd5a35f911a9f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "35bb943a6263785a2f8038824470ddc65b74edc9365eb05118fd5a35f911a9f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35bb943a6263785a2f8038824470ddc65b74edc9365eb05118fd5a35f911a9f6", kill_on_drop: false }`
[INFO] [stdout] 35bb943a6263785a2f8038824470ddc65b74edc9365eb05118fd5a35f911a9f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f032d76005e00b0e9b1df200458d10f4f152904a33bad71d425ad29e335671f9
[INFO] running `Command { std: "docker" "start" "-a" "f032d76005e00b0e9b1df200458d10f4f152904a33bad71d425ad29e335671f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-segmentation v1.13.2
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking crossbeam-queue v0.3.12
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]     Checking serde_json v1.0.149
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]     Checking tokio v1.52.3
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking matchers v0.2.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.23
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]    Compiling darling_core v0.14.4
[INFO] [stderr]    Compiling strum_macros v0.22.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling chrometracer-attributes v0.1.1
[INFO] [stderr]     Checking strum v0.22.0
[INFO] [stderr]    Compiling darling_macro v0.14.4
[INFO] [stderr]    Compiling darling v0.14.4
[INFO] [stderr]    Compiling derive_builder_core v0.11.2
[INFO] [stderr]    Compiling derive_builder_macro v0.11.2
[INFO] [stderr]     Checking derive_builder v0.11.2
[INFO] [stderr]     Checking tracing-chrometrace v0.1.19
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/tracing-chrometrace-0.1.19/src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(thread_id_value)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tracing-chrometrace` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f032d76005e00b0e9b1df200458d10f4f152904a33bad71d425ad29e335671f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f032d76005e00b0e9b1df200458d10f4f152904a33bad71d425ad29e335671f9", kill_on_drop: false }`
[INFO] [stdout] f032d76005e00b0e9b1df200458d10f4f152904a33bad71d425ad29e335671f9