[INFO] fetching crate flowstdlib 0.142.0...
[INFO] testing flowstdlib-0.142.0 against 1.76.0 for beta-1.77-1
[INFO] extracting crate flowstdlib 0.142.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate flowstdlib 0.142.0 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flowstdlib 0.142.0
[INFO] finished tweaking crates.io crate flowstdlib 0.142.0
[INFO] tweaked toml for crates.io crate flowstdlib 0.142.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded flowmacro v0.142.0
[INFO] [stderr]   Downloaded simpath v2.5.0
[INFO] [stderr]   Downloaded flowcore v0.142.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e4a0e2148c353071f42bdbc14d9ca0ef1c1f7e64882ceab2d409b43ade81b49
[INFO] running `Command { std: "docker" "start" "-a" "6e4a0e2148c353071f42bdbc14d9ca0ef1c1f7e64882ceab2d409b43ade81b49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e4a0e2148c353071f42bdbc14d9ca0ef1c1f7e64882ceab2d409b43ade81b49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e4a0e2148c353071f42bdbc14d9ca0ef1c1f7e64882ceab2d409b43ade81b49", kill_on_drop: false }`
[INFO] [stdout] 6e4a0e2148c353071f42bdbc14d9ca0ef1c1f7e64882ceab2d409b43ade81b49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+1.76.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4062d853219f23b4d4fc98472287584800fce1b301772dc7c5ddbaf6ce6167a
[INFO] running `Command { std: "docker" "start" "-a" "d4062d853219f23b4d4fc98472287584800fce1b301772dc7c5ddbaf6ce6167a", kill_on_drop: false }`
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling backtrace v0.3.69
[INFO] [stderr]    Compiling unicode-bidi v0.3.15
[INFO] [stderr]    Compiling matches v0.1.10
[INFO] [stderr]    Compiling curl v0.4.46
[INFO] [stderr]    Compiling curl-sys v0.4.72+curl-8.6.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling gimli v0.28.1
[INFO] [stderr]    Compiling object v0.32.2
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]    Compiling miniz_oxide v0.7.2
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.23
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling socket2 v0.5.5
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling unsafe-libyaml v0.2.10
[INFO] [stderr]    Compiling serde_json v1.0.113
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling openssl-sys v0.9.99
[INFO] [stderr]    Compiling libz-sys v1.1.15
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling idna v0.2.3
[INFO] [stderr]    Compiling addr2line v0.21.0
[INFO] [stderr]    Compiling serde_derive v1.0.196
[INFO] [stderr]    Compiling serde v1.0.196
[INFO] [stderr]    Compiling toml_datetime v0.6.5
[INFO] [stderr]    Compiling serde_spanned v0.6.5
[INFO] [stderr]    Compiling url v2.2.2
[INFO] [stderr]    Compiling serde_yaml v0.9.31
[INFO] [stderr]    Compiling toml_edit v0.22.4
[INFO] [stderr]    Compiling simpath v2.5.0
[INFO] [stderr]    Compiling toml v0.8.10
[INFO] [stderr]    Compiling flowcore v0.142.0
[INFO] [stderr]    Compiling flowmacro v0.142.0
[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/flowmacro-0.142.0/src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_span)]
[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 `flowmacro` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d4062d853219f23b4d4fc98472287584800fce1b301772dc7c5ddbaf6ce6167a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4062d853219f23b4d4fc98472287584800fce1b301772dc7c5ddbaf6ce6167a", kill_on_drop: false }`
[INFO] [stdout] d4062d853219f23b4d4fc98472287584800fce1b301772dc7c5ddbaf6ce6167a
