[INFO] fetching crate quiver-h3 0.1.0...
[INFO] testing quiver-h3-0.1.0 against 1.75.0 for beta-1.76-1
[INFO] extracting crate quiver-h3 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate quiver-h3 0.1.0 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 quiver-h3 0.1.0
[INFO] finished tweaking crates.io crate quiver-h3 0.1.0
[INFO] tweaked toml for crates.io crate quiver-h3 0.1.0 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]     Blocking waiting for file lock on package cache
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded qlog v0.9.0
[INFO] [stderr]   Downloaded tokio-bitstream-io v0.0.7
[INFO] [stderr]   Downloaded quiver-qpack v0.1.1
[INFO] [stderr]   Downloaded octets v0.2.0
[INFO] [stderr]   Downloaded quiche-tokio v0.1.0
[INFO] [stderr]   Downloaded quiche v0.18.0
[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] 6c9fbce316044f5617f6080319c7cfb9c8cb1ca1b07b2afe1c7e7184408e1835
[INFO] running `Command { std: "docker" "start" "-a" "6c9fbce316044f5617f6080319c7cfb9c8cb1ca1b07b2afe1c7e7184408e1835", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c9fbce316044f5617f6080319c7cfb9c8cb1ca1b07b2afe1c7e7184408e1835", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c9fbce316044f5617f6080319c7cfb9c8cb1ca1b07b2afe1c7e7184408e1835", kill_on_drop: false }`
[INFO] [stdout] 6c9fbce316044f5617f6080319c7cfb9c8cb1ca1b07b2afe1c7e7184408e1835
[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] d7d22e4907825d37838c07747dffb373df24c5ed82a6ab5dc49481e4084fb52a
[INFO] running `Command { std: "docker" "start" "-a" "d7d22e4907825d37838c07747dffb373df24c5ed82a6ab5dc49481e4084fb52a", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling serde v1.0.194
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling siphasher v0.3.11
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling phf_shared v0.11.2
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling cmake v0.1.50
[INFO] [stderr]    Compiling phf v0.11.2
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling intrusive-collections v0.9.6
[INFO] [stderr]    Compiling octets v0.2.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling bitstream-io v1.10.0
[INFO] [stderr]    Compiling phf_generator v0.11.2
[INFO] [stderr]    Compiling quiche v0.18.0
[INFO] [stderr]    Compiling phf_codegen v0.11.2
[INFO] [stderr]    Compiling quiver-qpack v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.194
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling async-trait v0.1.77
[INFO] [stderr]    Compiling darling_core v0.13.4
[INFO] [stderr]    Compiling tokio v1.35.1
[INFO] [stderr]    Compiling darling_macro v0.13.4
[INFO] [stderr]    Compiling darling v0.13.4
[INFO] [stderr]    Compiling serde_with_macros v1.5.2
[INFO] [stderr]    Compiling tokio-bitstream-io v0.0.7
[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-6f17d22bba15001f/quiver-qpack-0.1.1/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(extract_if)]
[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 `quiver-qpack` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d7d22e4907825d37838c07747dffb373df24c5ed82a6ab5dc49481e4084fb52a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7d22e4907825d37838c07747dffb373df24c5ed82a6ab5dc49481e4084fb52a", kill_on_drop: false }`
[INFO] [stdout] d7d22e4907825d37838c07747dffb373df24c5ed82a6ab5dc49481e4084fb52a
