[INFO] cloning repository https://github.com/lfairy/weldyn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lfairy/weldyn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flfairy%2Fweldyn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flfairy%2Fweldyn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8af1cf66e5bcb540f1dd03134a858d5eb08f875d
[INFO] checking lfairy/weldyn against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flfairy%2Fweldyn" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lfairy/weldyn
[INFO] finished tweaking git repo https://github.com/lfairy/weldyn
[INFO] tweaked toml for git repo https://github.com/lfairy/weldyn written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lfairy/weldyn 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] crate git repo https://github.com/lfairy/weldyn already has a lockfile, it will not be regenerated
[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]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.16
[INFO] [stderr]   Downloaded runtime-raw v0.3.0-alpha.4
[INFO] [stderr]   Downloaded pin-utils v0.1.0-alpha.4
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.16
[INFO] [stderr]   Downloaded futures-preview v0.3.0-alpha.16
[INFO] [stderr]   Downloaded memchr v2.2.0
[INFO] [stderr]   Downloaded num_cpus v1.10.1
[INFO] [stderr]   Downloaded runtime v0.3.0-alpha.6
[INFO] [stderr]   Downloaded runtime-attributes v0.3.0-alpha.5
[INFO] [stderr]   Downloaded juliex v0.3.0-alpha.7
[INFO] [stderr]   Downloaded owning_ref v0.4.0
[INFO] [stderr]   Downloaded scopeguard v0.3.3
[INFO] [stderr]   Downloaded async-datagram v2.2.0
[INFO] [stderr]   Downloaded crossbeam-deque v0.6.3
[INFO] [stderr]   Downloaded memoffset v0.2.1
[INFO] [stderr]   Downloaded runtime-native v0.3.0-alpha.5
[INFO] [stderr]   Downloaded futures-io-preview v0.3.0-alpha.16
[INFO] [stderr]   Downloaded lazy_static v1.3.0
[INFO] [stderr]   Downloaded mio-uds v0.6.7
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.3.24
[INFO] [stderr]   Downloaded futures-timer v0.2.1
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.47
[INFO] [stderr]   Downloaded quote v0.6.12
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.47
[INFO] [stderr]   Downloaded nodrop v0.1.13
[INFO] [stderr]   Downloaded byteorder v1.3.2
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[INFO] [stderr]   Downloaded arrayvec v0.4.10
[INFO] [stderr]   Downloaded romio v0.3.0-alpha.9
[INFO] [stderr]   Downloaded crossbeam-epoch v0.7.1
[INFO] [stderr]   Downloaded crossbeam-channel v0.3.8
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.16
[INFO] [stderr]   Downloaded js-sys v0.3.24
[INFO] [stderr]   Downloaded crossbeam v0.6.0
[INFO] [stderr]   Downloaded mio v0.6.19
[INFO] [stderr]   Downloaded syn v0.15.39
[INFO] [stderr]   Downloaded futures v0.1.28
[INFO] [stderr]   Downloaded bumpalo v2.5.0
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.47
[INFO] [stderr]   Downloaded async-ready v3.0.0
[INFO] [stderr]   Downloaded iovec v0.1.2
[INFO] [stderr]   Downloaded net2 v0.2.33
[INFO] [stderr]   Downloaded lock_api v0.1.5
[INFO] [stderr]   Downloaded parking_lot_core v0.4.0
[INFO] [stderr]   Downloaded parking_lot v0.7.1
[INFO] [stderr]   Downloaded futures-executor-preview v0.3.0-alpha.16
[INFO] [stderr]   Downloaded async-datagram v3.0.0
[INFO] [stderr]   Downloaded stable_deref_trait v1.1.1
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.47
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.47
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.16
[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] 5c3c4065eca2fbd7e01ab4ed89e1f470a922174f779873b52abd40010b46dc8e
[INFO] running `Command { std: "docker" "start" "-a" "5c3c4065eca2fbd7e01ab4ed89e1f470a922174f779873b52abd40010b46dc8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c3c4065eca2fbd7e01ab4ed89e1f470a922174f779873b52abd40010b46dc8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c3c4065eca2fbd7e01ab4ed89e1f470a922174f779873b52abd40010b46dc8e", kill_on_drop: false }`
[INFO] [stdout] 5c3c4065eca2fbd7e01ab4ed89e1f470a922174f779873b52abd40010b46dc8e
[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] 061a5352cf198a72b53572883e5ca9e1c0eb90c2fca330188caafe350170f78a
[INFO] running `Command { std: "docker" "start" "-a" "061a5352cf198a72b53572883e5ca9e1c0eb90c2fca330188caafe350170f78a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.16
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking futures v0.1.28
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking crossbeam-utils v0.6.5
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]     Checking async-ready v3.0.0
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.16
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.16
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking async-datagram v3.0.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.16
[INFO] [stderr]     Checking async-datagram v2.2.0
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[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/async-datagram-2.2.0/src/lib.rs:43:1
[INFO] [stdout]    |
[INFO] [stdout] 43 | #![feature(futures_api)]
[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 `async-datagram` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "061a5352cf198a72b53572883e5ca9e1c0eb90c2fca330188caafe350170f78a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "061a5352cf198a72b53572883e5ca9e1c0eb90c2fca330188caafe350170f78a", kill_on_drop: false }`
[INFO] [stdout] 061a5352cf198a72b53572883e5ca9e1c0eb90c2fca330188caafe350170f78a