[INFO] fetching crate recmd 0.3.0...
[INFO] testing recmd-0.3.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate recmd 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate recmd 0.3.0
[INFO] finished tweaking crates.io crate recmd 0.3.0
[INFO] tweaked toml for crates.io crate recmd 0.3.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate recmd 0.3.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate recmd 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" "+562dee4820c458d823175268e41601d4c060588a" "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]  Downloading crates ...
[INFO] [stderr]   Downloaded generic-array v0.14.6
[INFO] [stderr]   Downloaded sha2 v0.10.6
[INFO] [stderr]   Downloaded cpufeatures v0.2.5
[INFO] [stderr]   Downloaded block-buffer v0.10.3
[INFO] [stderr]   Downloaded getrandom v0.2.8
[INFO] [stderr]   Downloaded subtle v2.4.1
[INFO] [stderr]   Downloaded typenum v1.16.0
[INFO] [stderr]   Downloaded digest v0.10.6
[INFO] [stderr]   Downloaded aead v0.5.1
[INFO] [stderr]   Downloaded shell-words v1.1.0
[INFO] [stderr]   Downloaded argh_shared v0.1.10
[INFO] [stderr]   Downloaded inout v0.1.3
[INFO] [stderr]   Downloaded universal-hash v0.5.0
[INFO] [stderr]   Downloaded opaque-debug v0.3.0
[INFO] [stderr]   Downloaded argh_derive v0.1.10
[INFO] [stderr]   Downloaded byteorder v1.4.3
[INFO] [stderr]   Downloaded quote v1.0.23
[INFO] [stderr]   Downloaded argh v0.1.10
[INFO] [stderr]   Downloaded chacha20 v0.9.0
[INFO] [stderr]   Downloaded cipher v0.4.3
[INFO] [stderr]   Downloaded poly1305 v0.8.0
[INFO] [stderr]   Downloaded zeroize v1.5.7
[INFO] [stderr]   Downloaded proc-macro2 v1.0.51
[INFO] [stderr]   Downloaded unicode-ident v1.0.6
[INFO] [stderr]   Downloaded chacha20poly1305 v0.10.1
[INFO] [stderr]   Downloaded bytes v1.4.0
[INFO] [stderr]   Downloaded syn v1.0.107
[INFO] [stderr]   Downloaded libc v0.2.139
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 20653faa4ceb20e2819453b04285403a310e4afbdee02ba6d08dd7f61abe1c58
[INFO] running `Command { std: "docker" "start" "-a" "20653faa4ceb20e2819453b04285403a310e4afbdee02ba6d08dd7f61abe1c58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "20653faa4ceb20e2819453b04285403a310e4afbdee02ba6d08dd7f61abe1c58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "20653faa4ceb20e2819453b04285403a310e4afbdee02ba6d08dd7f61abe1c58", kill_on_drop: false }`
[INFO] [stdout] 20653faa4ceb20e2819453b04285403a310e4afbdee02ba6d08dd7f61abe1c58
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61bbaad2ab2c213a54d74e0570eebdae2a410d8fade0d73503ca754ae66a9f3d
[INFO] running `Command { std: "docker" "start" "-a" "61bbaad2ab2c213a54d74e0570eebdae2a410d8fade0d73503ca754ae66a9f3d", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling cpufeatures v0.2.5
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling zeroize v1.5.7
[INFO] [stderr]    Compiling subtle v2.4.1
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling argh_shared v0.1.10
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling shell-words v1.1.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.51/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]    Compiling bytes v1.4.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling hex v0.4.3
[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" "61bbaad2ab2c213a54d74e0570eebdae2a410d8fade0d73503ca754ae66a9f3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61bbaad2ab2c213a54d74e0570eebdae2a410d8fade0d73503ca754ae66a9f3d", kill_on_drop: false }`
[INFO] [stdout] 61bbaad2ab2c213a54d74e0570eebdae2a410d8fade0d73503ca754ae66a9f3d