[INFO] fetching crate mdbook-svgbob2 0.3.0...
[INFO] testing mdbook-svgbob2-0.3.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate mdbook-svgbob2 0.3.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate mdbook-svgbob2 0.3.0
[INFO] finished tweaking crates.io crate mdbook-svgbob2 0.3.0
[INFO] tweaked toml for crates.io crate mdbook-svgbob2 0.3.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mdbook-svgbob2 0.3.0 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 mdbook-svgbob2 0.3.0 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 sauron-core v0.50.6
[INFO] [stderr]   Downloaded sauron-component-macro v0.50.6
[INFO] [stderr]   Downloaded mt-dom v0.20.0
[INFO] [stderr]   Downloaded serde_derive v1.0.145
[INFO] [stderr]   Downloaded num-complex v0.4.2
[INFO] [stderr]   Downloaded bytemuck v1.12.1
[INFO] [stderr]   Downloaded pulldown-cmark-to-cmark v10.0.4
[INFO] [stderr]   Downloaded futures-sink v0.3.24
[INFO] [stderr]   Downloaded matrixmultiply v0.3.2
[INFO] [stderr]   Downloaded toml v0.5.9
[INFO] [stderr]   Downloaded futures-task v0.3.24
[INFO] [stderr]   Downloaded digest v0.10.5
[INFO] [stderr]   Downloaded tokio-stream v0.1.10
[INFO] [stderr]   Downloaded futures-channel v0.3.24
[INFO] [stderr]   Downloaded futures-core v0.3.24
[INFO] [stderr]   Downloaded iana-time-zone v0.1.50
[INFO] [stderr]   Downloaded pulldown-cmark v0.9.2
[INFO] [stderr]   Downloaded libm v0.2.5
[INFO] [stderr]   Downloaded textwrap v0.15.1
[INFO] [stderr]   Downloaded pest v2.4.0
[INFO] [stderr]   Downloaded clap v3.2.22
[INFO] [stderr]   Downloaded topological-sort v0.1.0
[INFO] [stderr]   Downloaded jss v0.5.1
[INFO] [stderr]   Downloaded h2 v0.3.14
[INFO] [stderr]   Downloaded futures-util v0.3.24
[INFO] [stderr]   Downloaded gitignore v1.0.7
[INFO] [stderr]   Downloaded tokio v1.21.2
[INFO] [stderr]   Downloaded simba v0.7.2
[INFO] [stderr]   Downloaded ammonia v3.2.1
[INFO] [stderr]   Downloaded clap_complete v3.2.5
[INFO] [stderr]   Downloaded env_logger v0.9.1
[INFO] [stderr]   Downloaded pest_meta v2.4.0
[INFO] [stderr]   Downloaded pest_generator v2.4.0
[INFO] [stderr]   Downloaded pest_derive v2.4.0
[INFO] [stderr]   Downloaded opener v0.5.0
[INFO] [stderr]   Downloaded futures-macro v0.3.24
[INFO] [stderr]   Downloaded safe_arch v0.6.0
[INFO] [stderr]   Downloaded wide v0.7.4
[INFO] [stderr]   Downloaded pom v3.2.0
[INFO] [stderr]   Downloaded handlebars v4.3.4
[INFO] [stderr]   Downloaded elasticlunr-rs v3.0.1
[INFO] [stderr]   Downloaded sauron v0.50.6
[INFO] [stderr]   Downloaded svgbob v0.6.7
[INFO] [stderr]   Downloaded parry2d v0.8.0
[INFO] [stderr]   Downloaded mdbook v0.4.21
[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] 779df7b0cc90f1e2762e567e94fe82a5a59277d5cf8df5aca4c1a35c56dc2a6c
[INFO] running `Command { std: "docker" "start" "-a" "779df7b0cc90f1e2762e567e94fe82a5a59277d5cf8df5aca4c1a35c56dc2a6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "779df7b0cc90f1e2762e567e94fe82a5a59277d5cf8df5aca4c1a35c56dc2a6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "779df7b0cc90f1e2762e567e94fe82a5a59277d5cf8df5aca4c1a35c56dc2a6c", kill_on_drop: false }`
[INFO] [stdout] 779df7b0cc90f1e2762e567e94fe82a5a59277d5cf8df5aca4c1a35c56dc2a6c
[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] b0339403558c6e60923b0e3437d3d350c9113b06352cef932ef1558a89f1f9c0
[INFO] running `Command { std: "docker" "start" "-a" "b0339403558c6e60923b0e3437d3d350c9113b06352cef932ef1558a89f1f9c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling once_cell v1.15.0
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling itoa v1.0.3
[INFO] [stderr]    Compiling bytes v1.2.1
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling libm v0.2.5
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling futures-core v0.3.24
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.46/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 tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling tinyvec v1.6.0
[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" "b0339403558c6e60923b0e3437d3d350c9113b06352cef932ef1558a89f1f9c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0339403558c6e60923b0e3437d3d350c9113b06352cef932ef1558a89f1f9c0", kill_on_drop: false }`
[INFO] [stdout] b0339403558c6e60923b0e3437d3d350c9113b06352cef932ef1558a89f1f9c0