[INFO] cloning repository https://github.com/lf-/synthtoy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lf-/synthtoy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flf-%2Fsynthtoy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flf-%2Fsynthtoy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3702a90599dc3b6e65ce2c32d1155530b3172fd
[INFO] checking lf-/synthtoy against try#5ff93158e08fa2205cd4b86cddf9eae95952cc96 for pr-129543-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flf-%2Fsynthtoy" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lf-/synthtoy
[INFO] finished tweaking git repo https://github.com/lf-/synthtoy
[INFO] tweaked toml for git repo https://github.com/lf-/synthtoy written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lf-/synthtoy on toolchain 5ff93158e08fa2205cd4b86cddf9eae95952cc96
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ff93158e08fa2205cd4b86cddf9eae95952cc96" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lf-/synthtoy 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" "+5ff93158e08fa2205cd4b86cddf9eae95952cc96" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded riff v1.0.1
[INFO] [stderr]   Downloaded plotters-svg v0.3.3
[INFO] [stderr]   Downloaded transpose v0.2.2
[INFO] [stderr]   Downloaded plotters-backend v0.3.4
[INFO] [stderr]   Downloaded plotters-bitmap v0.3.2
[INFO] [stderr]   Downloaded coremidi-sys v3.1.0
[INFO] [stderr]   Downloaded midir v0.8.0
[INFO] [stderr]   Downloaded yeslogic-fontconfig-sys v3.2.0
[INFO] [stderr]   Downloaded is-terminal v0.4.0
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.82
[INFO] [stderr]   Downloaded const-cstr v0.3.0
[INFO] [stderr]   Downloaded clap_derive v4.0.21
[INFO] [stderr]   Downloaded freetype v0.7.0
[INFO] [stderr]   Downloaded pathfinder_simd v0.5.1
[INFO] [stderr]   Downloaded coremidi v0.6.0
[INFO] [stderr]   Downloaded io-lifetimes v1.0.2
[INFO] [stderr]   Downloaded cc v1.0.77
[INFO] [stderr]   Downloaded cxx-build v1.0.82
[INFO] [stderr]   Downloaded font-kit v0.11.0
[INFO] [stderr]   Downloaded pest v2.5.0
[INFO] [stderr]   Downloaded primal-check v0.3.3
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.82
[INFO] [stderr]   Downloaded cxx v1.0.82
[INFO] [stderr]   Downloaded clap v4.0.27
[INFO] [stderr]   Downloaded chrono v0.4.23
[INFO] [stderr]   Downloaded nix v0.23.1
[INFO] [stderr]   Downloaded rustix v0.36.3
[INFO] [stderr]   Downloaded rustfft v6.1.0
[INFO] [stderr]   Downloaded wav v1.0.0
[INFO] [stderr]   Downloaded linux-raw-sys v0.1.3
[INFO] [stderr]   Downloaded plotters v0.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+5ff93158e08fa2205cd4b86cddf9eae95952cc96" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a99fc4e98bb16d97715c212d502319d589b716c397c5b7091bd00a79c2bfb1af
[INFO] running `Command { std: "docker" "start" "-a" "a99fc4e98bb16d97715c212d502319d589b716c397c5b7091bd00a79c2bfb1af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a99fc4e98bb16d97715c212d502319d589b716c397c5b7091bd00a79c2bfb1af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a99fc4e98bb16d97715c212d502319d589b716c397c5b7091bd00a79c2bfb1af", kill_on_drop: false }`
[INFO] [stdout] a99fc4e98bb16d97715c212d502319d589b716c397c5b7091bd00a79c2bfb1af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+5ff93158e08fa2205cd4b86cddf9eae95952cc96" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9203e2c47dd2aa7f7f545a45c6fb33dead12686389ca2d4125712a807cba9e7
[INFO] running `Command { std: "docker" "start" "-a" "a9203e2c47dd2aa7f7f545a45c6fb33dead12686389ca2d4125712a807cba9e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling cc v1.0.77
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling yeslogic-fontconfig-sys v3.2.0
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]    Compiling io-lifetimes v1.0.2
[INFO] [stderr]    Compiling sdl2-sys v0.35.2
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]    Compiling rustix v0.36.3
[INFO] [stderr]     Checking dlib v0.5.0
[INFO] [stderr]     Checking num-rational v0.4.1
[INFO] [stderr]     Checking linux-raw-sys v0.1.3
[INFO] [stderr]    Compiling font-kit v0.11.0
[INFO] [stderr]     Checking bytemuck v1.12.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a feature with a similar name: `proc_macro_span_file`
[INFO] [stdout]    |
[INFO] [stdout] 92 -     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout] 92 +     feature(proc_macro_span, proc_macro_span_file)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking plotters-backend v0.3.4
[INFO] [stderr]     Checking jpeg-decoder v0.3.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking const-cstr v0.3.0
[INFO] [stderr]     Checking walkdir v2.3.2
[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" "a9203e2c47dd2aa7f7f545a45c6fb33dead12686389ca2d4125712a807cba9e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9203e2c47dd2aa7f7f545a45c6fb33dead12686389ca2d4125712a807cba9e7", kill_on_drop: false }`
[INFO] [stdout] a9203e2c47dd2aa7f7f545a45c6fb33dead12686389ca2d4125712a807cba9e7