[INFO] cloning repository https://github.com/guohuiyuan/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/guohuiyuan/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguohuiyuan%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguohuiyuan%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bebd13e4168c7d9e11ac926483753a1296788a0d
[INFO] checking guohuiyuan/rust-learning against master#6162f6f12339aa81fe16b8a64644ead497e411b2 for pr-113240
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fguohuiyuan%2Frust-learning" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/guohuiyuan/rust-learning on toolchain 6162f6f12339aa81fe16b8a64644ead497e411b2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/guohuiyuan/rust-learning
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/guohuiyuan/rust-learning
[INFO] tweaked toml for git repo https://github.com/guohuiyuan/rust-learning written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/guohuiyuan/rust-learning 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" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded jsonpath v0.1.1
[INFO] [stderr]   Downloaded structopt-derive v0.4.18
[INFO] [stderr]   Downloaded matchit v0.5.0
[INFO] [stderr]   Downloaded futures-executor v0.3.24
[INFO] [stderr]   Downloaded futures-io v0.3.24
[INFO] [stderr]   Downloaded futures-macro v0.3.24
[INFO] [stderr]   Downloaded anyhow v1.0.65
[INFO] [stderr]   Downloaded libm v0.2.5
[INFO] [stderr]   Downloaded tower-http v0.3.4
[INFO] [stderr]   Downloaded axum v0.5.16
[INFO] [stderr]   Downloaded libsqlite3-sys v0.25.1
[INFO] [stderr]   Downloaded libc v0.2.134
[INFO] [stderr]   Downloaded error-chain v0.11.0
[INFO] [stderr]   Downloaded futures v0.3.24
[INFO] [stderr]   Downloaded structopt v0.3.26
[INFO] [stderr]   Downloaded async-trait v0.1.57
[INFO] [stderr]   Downloaded backtrace v0.3.66
[INFO] [stderr]   Downloaded pest v1.0.6
[INFO] [stderr]   Downloaded pest_derive v1.0.8
[INFO] [stderr]   Downloaded object v0.29.0
[INFO] [stderr]   Downloaded axum-core v0.2.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b89e0c7b66900a3c0c97aecc826ca2fdccfcfa4ecaf51dfe3360c633a8431f38
[INFO] running `Command { std: "docker" "start" "-a" "b89e0c7b66900a3c0c97aecc826ca2fdccfcfa4ecaf51dfe3360c633a8431f38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b89e0c7b66900a3c0c97aecc826ca2fdccfcfa4ecaf51dfe3360c633a8431f38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b89e0c7b66900a3c0c97aecc826ca2fdccfcfa4ecaf51dfe3360c633a8431f38", kill_on_drop: false }`
[INFO] [stdout] b89e0c7b66900a3c0c97aecc826ca2fdccfcfa4ecaf51dfe3360c633a8431f38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:a420fdec406141845121210faa381f8029b0be6d4170deff7c4445a424f67918" "/opt/rustwide/cargo-home/bin/cargo" "+6162f6f12339aa81fe16b8a64644ead497e411b2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d4e03b2283b297eb76462fbc5cad45d5f87662d7f8794f8e68df2c973cb23a9
[INFO] running `Command { std: "docker" "start" "-a" "4d4e03b2283b297eb76462fbc5cad45d5f87662d7f8794f8e68df2c973cb23a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling unicode-ident v1.0.4
[INFO] [stderr]    Compiling syn v1.0.102
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]     Checking once_cell v1.15.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling futures-core v0.3.24
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling futures-channel v0.3.24
[INFO] [stderr]    Compiling futures-task v0.3.24
[INFO] [stderr]     Checking futures-sink v0.3.24
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling futures-util v0.3.24
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/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] 
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "4d4e03b2283b297eb76462fbc5cad45d5f87662d7f8794f8e68df2c973cb23a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d4e03b2283b297eb76462fbc5cad45d5f87662d7f8794f8e68df2c973cb23a9", kill_on_drop: false }`
[INFO] [stdout] 4d4e03b2283b297eb76462fbc5cad45d5f87662d7f8794f8e68df2c973cb23a9