[INFO] fetching crate four-bar-ui 4.0.0...
[INFO] testing four-bar-ui-4.0.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate four-bar-ui 4.0.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate four-bar-ui 4.0.0
[INFO] finished tweaking crates.io crate four-bar-ui 4.0.0
[INFO] tweaked toml for crates.io crate four-bar-ui 4.0.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate four-bar-ui 4.0.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate four-bar-ui 4.0.0 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-expr v0.14.0
[INFO] [stderr]   Downloaded gobject-sys v0.16.3
[INFO] [stderr]   Downloaded pango-sys v0.16.3
[INFO] [stderr]   Downloaded system-deps v6.0.4
[INFO] [stderr]   Downloaded wild v2.1.0
[INFO] [stderr]   Downloaded polling v2.7.0
[INFO] [stderr]   Downloaded nalgebra-macros v0.2.0
[INFO] [stderr]   Downloaded glutin_egl_sys v0.4.0
[INFO] [stderr]   Downloaded egui-winit v0.21.1
[INFO] [stderr]   Downloaded async-recursion v1.0.4
[INFO] [stderr]   Downloaded accesskit v0.9.0
[INFO] [stderr]   Downloaded glutin v0.30.7
[INFO] [stderr]   Downloaded exr v1.6.3
[INFO] [stderr]   Downloaded zvariant v3.12.0
[INFO] [stderr]   Downloaded wide v0.7.8
[INFO] [stderr]   Downloaded zbus v3.11.1
[INFO] [stderr]   Downloaded tiny-skia v0.8.3
[INFO] [stderr]   Downloaded smithay-client-toolkit v0.16.0
[INFO] [stderr]   Downloaded pest v2.5.7
[INFO] [stderr]   Downloaded rustix v0.37.11
[INFO] [stderr]   Downloaded nalgebra v0.32.2
[INFO] [stderr]   Downloaded gdk-sys v0.16.0
[INFO] [stderr]   Downloaded gio-sys v0.16.3
[INFO] [stderr]   Downloaded calloop v0.10.5
[INFO] [stderr]   Downloaded efd v2.2.2
[INFO] [stderr]   Downloaded gtk-sys v0.16.0
[INFO] [stderr]   Downloaded egui_glow v0.21.0
[INFO] [stderr]   Downloaded tiny-skia-path v0.8.3
[INFO] [stderr]   Downloaded eframe v0.21.3
[INFO] [stderr]   Downloaded four-bar v4.0.0
[INFO] [stderr]   Downloaded indicatif v0.17.3
[INFO] [stderr]   Downloaded interp v1.0.1
[INFO] [stderr]   Downloaded serde_repr v0.1.12
[INFO] [stderr]   Downloaded zbus_macros v3.11.1
[INFO] [stderr]   Downloaded zbus_names v2.5.0
[INFO] [stderr]   Downloaded enumflags2_derive v0.7.6
[INFO] [stderr]   Downloaded enumflags2 v0.7.6
[INFO] [stderr]   Downloaded zvariant_utils v1.0.0
[INFO] [stderr]   Downloaded zvariant_derive v3.12.0
[INFO] [stderr]   Downloaded dark-light v1.0.0
[INFO] [stderr]   Downloaded enumn v0.1.8
[INFO] [stderr]   Downloaded pest_meta v2.5.7
[INFO] [stderr]   Downloaded pest_generator v2.5.7
[INFO] [stderr]   Downloaded pest_derive v2.5.7
[INFO] [stderr]   Downloaded py_literal v0.4.0
[INFO] [stderr]   Downloaded gdk-pixbuf-sys v0.16.3
[INFO] [stderr]   Downloaded strict-num v0.1.0
[INFO] [stderr]   Downloaded ndarray-npy v0.8.1
[INFO] [stderr]   Downloaded zune-inflate v0.2.53
[INFO] [stderr]   Downloaded console v0.15.5
[INFO] [stderr]   Downloaded atk-sys v0.16.0
[INFO] [stderr]   Downloaded glib-sys v0.16.3
[INFO] [stderr]   Downloaded serde v1.0.159
[INFO] [stderr]   Downloaded rfd v0.11.3
[INFO] [stderr]   Downloaded metaheuristics-nature v8.0.4
[INFO] [stderr]   Downloaded cairo-sys-rs v0.16.3
[INFO] [stderr]   Downloaded serde_derive v1.0.159
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b2dcfa8151f9b51a68a3ddb84bd6c40d43f8f0928c3b091c1e7efea8a1f321d
[INFO] running `Command { std: "docker" "start" "-a" "2b2dcfa8151f9b51a68a3ddb84bd6c40d43f8f0928c3b091c1e7efea8a1f321d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b2dcfa8151f9b51a68a3ddb84bd6c40d43f8f0928c3b091c1e7efea8a1f321d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b2dcfa8151f9b51a68a3ddb84bd6c40d43f8f0928c3b091c1e7efea8a1f321d", kill_on_drop: false }`
[INFO] [stdout] 2b2dcfa8151f9b51a68a3ddb84bd6c40d43f8f0928c3b091c1e7efea8a1f321d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 1a379978537faf70b3e8d56014b1ba1782be4b388a0c671d17bac3d5040c4943
[INFO] running `Command { std: "docker" "start" "-a" "1a379978537faf70b3e8d56014b1ba1782be4b388a0c671d17bac3d5040c4943", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling serde v1.0.159
[INFO] [stderr]    Compiling serde_derive v1.0.159
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling winnow v0.4.1
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling version-compare v0.1.1
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1a379978537faf70b3e8d56014b1ba1782be4b388a0c671d17bac3d5040c4943", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a379978537faf70b3e8d56014b1ba1782be4b388a0c671d17bac3d5040c4943", kill_on_drop: false }`
[INFO] [stdout] 1a379978537faf70b3e8d56014b1ba1782be4b388a0c671d17bac3d5040c4943