[INFO] fetching crate nust64 0.4.1...
[INFO] checking nust64-0.4.1 against master#8a703520e80d87d4423c01f9d4fbc9e5f6533a02 for pr-154205-1
[INFO] extracting crate nust64 0.4.1 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate nust64 0.4.1
[INFO] finished tweaking crates.io crate nust64 0.4.1
[INFO] tweaked toml for crates.io crate nust64 0.4.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate nust64 0.4.1 on toolchain 8a703520e80d87d4423c01f9d4fbc9e5f6533a02
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nust64 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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded miniz_oxide v0.6.2
[INFO] [stderr]   Downloaded crc v2.1.0
[INFO] [stderr]   Downloaded bytes v1.3.0
[INFO] [stderr]   Downloaded bpaf_derive v0.3.3
[INFO] [stderr]   Downloaded camino v1.1.6
[INFO] [stderr]   Downloaded crc-catalog v1.1.1
[INFO] [stderr]   Downloaded proc-macro2 v1.0.49
[INFO] [stderr]   Downloaded flate2 v1.0.25
[INFO] [stderr]   Downloaded bpaf v0.7.7
[INFO] [stderr]   Downloaded object v0.28.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4383b2a90514d39f0ce33239d5513d1d21d8877fb2c2a51ec5a53b503ff0acd
[INFO] running `Command { std: "docker" "start" "-a" "f4383b2a90514d39f0ce33239d5513d1d21d8877fb2c2a51ec5a53b503ff0acd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4383b2a90514d39f0ce33239d5513d1d21d8877fb2c2a51ec5a53b503ff0acd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4383b2a90514d39f0ce33239d5513d1d21d8877fb2c2a51ec5a53b503ff0acd", kill_on_drop: false }`
[INFO] [stdout] f4383b2a90514d39f0ce33239d5513d1d21d8877fb2c2a51ec5a53b503ff0acd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 659d09e444f9ac16a09168ef88ee2364499cc9804a503253192cf19d343312a5
[INFO] running `Command { std: "docker" "start" "-a" "659d09e444f9ac16a09168ef88ee2364499cc9804a503253192cf19d343312a5", 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 memchr v2.5.0
[INFO] [stderr]    Compiling camino v1.1.6
[INFO] [stderr]     Checking crc-catalog v1.1.1
[INFO] [stderr]     Checking bytes v1.3.0
[INFO] [stderr]     Checking shlex v1.1.0
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]     Checking crc v2.1.0
[INFO] [stderr]     Checking flate2 v1.0.25
[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] 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 object v0.28.4
[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" "659d09e444f9ac16a09168ef88ee2364499cc9804a503253192cf19d343312a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "659d09e444f9ac16a09168ef88ee2364499cc9804a503253192cf19d343312a5", kill_on_drop: false }`
[INFO] [stdout] 659d09e444f9ac16a09168ef88ee2364499cc9804a503253192cf19d343312a5