[INFO] fetching crate fm_mod_synth 0.1.6...
[INFO] testing fm_mod_synth-0.1.6 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate fm_mod_synth 0.1.6 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate fm_mod_synth 0.1.6
[INFO] finished tweaking crates.io crate fm_mod_synth 0.1.6
[INFO] tweaked toml for crates.io crate fm_mod_synth 0.1.6 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fm_mod_synth 0.1.6 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fm_mod_synth 0.1.6 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.86
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.86
[INFO] [stderr]   Downloaded ndk v0.6.0
[INFO] [stderr]   Downloaded oboe v0.4.6
[INFO] [stderr]   Downloaded coreaudio-sys v0.2.12
[INFO] [stderr]   Downloaded alsa-sys v0.3.1
[INFO] [stderr]   Downloaded num-derive v0.3.3
[INFO] [stderr]   Downloaded cpal v0.13.5
[INFO] [stderr]   Downloaded coreaudio-rs v0.10.0
[INFO] [stderr]   Downloaded ndk-glue v0.6.2
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.86
[INFO] [stderr]   Downloaded js-sys v0.3.63
[INFO] [stderr]   Downloaded toml_edit v0.19.9
[INFO] [stderr]   Downloaded alsa v0.6.0
[INFO] [stderr]   Downloaded ndk-sys v0.3.0
[INFO] [stderr]   Downloaded jni v0.19.0
[INFO] [stderr]   Downloaded oboe-sys v0.4.5
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.86
[INFO] [stderr]   Downloaded nix v0.23.2
[INFO] [stderr]   Downloaded web-sys v0.3.63
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.86
[INFO] [stderr]   Downloaded winnow v0.4.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b4d7abd5b0d6366d180457ff4234fe7cf2d4c30b7b6c95ec20ebb9134980fd6
[INFO] running `Command { std: "docker" "start" "-a" "6b4d7abd5b0d6366d180457ff4234fe7cf2d4c30b7b6c95ec20ebb9134980fd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b4d7abd5b0d6366d180457ff4234fe7cf2d4c30b7b6c95ec20ebb9134980fd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b4d7abd5b0d6366d180457ff4234fe7cf2d4c30b7b6c95ec20ebb9134980fd6", kill_on_drop: false }`
[INFO] [stdout] 6b4d7abd5b0d6366d180457ff4234fe7cf2d4c30b7b6c95ec20ebb9134980fd6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5da84f54b3f0b590f73224297ea573899f47f7a55cbd8a2020f9ab6de14797e0
[INFO] running `Command { std: "docker" "start" "-a" "5da84f54b3f0b590f73224297ea573899f47f7a55cbd8a2020f9ab6de14797e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling proc-macro2 v1.0.58
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling cpal v0.13.5
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.58/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] [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" "5da84f54b3f0b590f73224297ea573899f47f7a55cbd8a2020f9ab6de14797e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5da84f54b3f0b590f73224297ea573899f47f7a55cbd8a2020f9ab6de14797e0", kill_on_drop: false }`
[INFO] [stdout] 5da84f54b3f0b590f73224297ea573899f47f7a55cbd8a2020f9ab6de14797e0