[INFO] fetching crate mini-forum 0.6.0...
[INFO] testing mini-forum-0.6.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate mini-forum 0.6.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate mini-forum 0.6.0
[INFO] finished tweaking crates.io crate mini-forum 0.6.0
[INFO] tweaked toml for crates.io crate mini-forum 0.6.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mini-forum 0.6.0 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 mini-forum 0.6.0 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[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] a6ecb2219352253d722e8aac8d97c5e4004f43f9a2c16394cd87de13d6db1208
[INFO] running `Command { std: "docker" "start" "-a" "a6ecb2219352253d722e8aac8d97c5e4004f43f9a2c16394cd87de13d6db1208", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6ecb2219352253d722e8aac8d97c5e4004f43f9a2c16394cd87de13d6db1208", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6ecb2219352253d722e8aac8d97c5e4004f43f9a2c16394cd87de13d6db1208", kill_on_drop: false }`
[INFO] [stdout] a6ecb2219352253d722e8aac8d97c5e4004f43f9a2c16394cd87de13d6db1208
[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] 533406aa9a4cb38551574b0cfc79356b9dacc4710e7227f5e77e82646bd2b644
[INFO] running `Command { std: "docker" "start" "-a" "533406aa9a4cb38551574b0cfc79356b9dacc4710e7227f5e77e82646bd2b644", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling syn v1.0.101
[INFO] [stderr]    Compiling once_cell v1.15.0
[INFO] [stderr]    Compiling futures-core v0.3.24
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling typenum v1.15.0
[INFO] [stderr]    Compiling bytes v1.2.1
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling parking_lot_core v0.9.3
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling futures-task v0.3.24
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling openssl v0.10.42
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]    Compiling futures-util v0.3.24
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling unicode-bidi v0.3.8
[INFO] [stderr]    Compiling futures-sink v0.3.24
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling percent-encoding v2.2.0
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling cpufeatures v0.2.5
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling form_urlencoded v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling futures-channel v0.3.24
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.46/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 subtle v2.4.1
[INFO] [stderr]    Compiling spin v0.9.4
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling crossbeam-queue v0.3.6
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling either v1.8.0
[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" "533406aa9a4cb38551574b0cfc79356b9dacc4710e7227f5e77e82646bd2b644", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "533406aa9a4cb38551574b0cfc79356b9dacc4710e7227f5e77e82646bd2b644", kill_on_drop: false }`
[INFO] [stdout] 533406aa9a4cb38551574b0cfc79356b9dacc4710e7227f5e77e82646bd2b644