[INFO] fetching crate wavegen 0.4.1...
[INFO] testing wavegen-0.4.1 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate wavegen 0.4.1 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate wavegen 0.4.1
[INFO] finished tweaking crates.io crate wavegen 0.4.1
[INFO] tweaked toml for crates.io crate wavegen 0.4.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate wavegen 0.4.1 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate wavegen 0.4.1 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" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ab0e7b76a21ff19452d70110a6004da604bedf64a94aaae728d64ca5228de38
[INFO] running `Command { std: "docker" "start" "-a" "0ab0e7b76a21ff19452d70110a6004da604bedf64a94aaae728d64ca5228de38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ab0e7b76a21ff19452d70110a6004da604bedf64a94aaae728d64ca5228de38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ab0e7b76a21ff19452d70110a6004da604bedf64a94aaae728d64ca5228de38", kill_on_drop: false }`
[INFO] [stdout] 0ab0e7b76a21ff19452d70110a6004da604bedf64a94aaae728d64ca5228de38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76a4f6a52742c1d19cef8fe23c80c5cacc69bd555f8f99aba42bc4cd52baf6e9
[INFO] running `Command { std: "docker" "start" "-a" "76a4f6a52742c1d19cef8fe23c80c5cacc69bd555f8f99aba42bc4cd52baf6e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling wavegen v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/lib.rs:288:17
[INFO] [stdout]     |
[INFO] [stdout] 288 |     pub fn iter(&self) -> WaveformIterator<T, P> {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 288 |     pub fn iter(&self) -> WaveformIterator<'_, T, P> {
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `Command { std: "docker" "inspect" "76a4f6a52742c1d19cef8fe23c80c5cacc69bd555f8f99aba42bc4cd52baf6e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76a4f6a52742c1d19cef8fe23c80c5cacc69bd555f8f99aba42bc4cd52baf6e9", kill_on_drop: false }`
[INFO] [stdout] 76a4f6a52742c1d19cef8fe23c80c5cacc69bd555f8f99aba42bc4cd52baf6e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 670699abb36ee56de929ae8da36d31e8652ac373e7b0b5f29082a24a6cdfbf79
[INFO] running `Command { std: "docker" "start" "-a" "670699abb36ee56de929ae8da36d31e8652ac373e7b0b5f29082a24a6cdfbf79", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.13
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling cmake v0.1.49
[INFO] [stderr]    Compiling yeslogic-fontconfig-sys v3.2.0
[INFO] [stderr]    Compiling libloading v0.7.4
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.49/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 byteorder v1.4.3
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling bytemuck v1.12.3
[INFO] [stderr]    Compiling font-kit v0.11.0
[INFO] [stderr]    Compiling rayon-core v1.10.1
[INFO] [stderr]    Compiling dlib v0.5.0
[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" "670699abb36ee56de929ae8da36d31e8652ac373e7b0b5f29082a24a6cdfbf79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "670699abb36ee56de929ae8da36d31e8652ac373e7b0b5f29082a24a6cdfbf79", kill_on_drop: false }`
[INFO] [stdout] 670699abb36ee56de929ae8da36d31e8652ac373e7b0b5f29082a24a6cdfbf79