[INFO] cloning repository https://github.com/andrewbaxter/bread-scan
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andrewbaxter/bread-scan" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewbaxter%2Fbread-scan", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewbaxter%2Fbread-scan'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9190bdd7cef96c077feec2eb4461bc8e3522f4aa
[INFO] checking andrewbaxter/bread-scan against try#dd2d87b6cc31907ae305875eb6be399783dc0256 for pr-143929
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewbaxter%2Fbread-scan" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/andrewbaxter/bread-scan
[INFO] finished tweaking git repo https://github.com/andrewbaxter/bread-scan
[INFO] tweaked toml for git repo https://github.com/andrewbaxter/bread-scan written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/andrewbaxter/bread-scan on toolchain dd2d87b6cc31907ae305875eb6be399783dc0256
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dd2d87b6cc31907ae305875eb6be399783dc0256" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/andrewbaxter/bread-scan 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" "+dd2d87b6cc31907ae305875eb6be399783dc0256" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded typed-arena v1.7.0
[INFO] [stderr]   Downloaded structre v0.0.1
[INFO] [stderr]   Downloaded structre_proc_macros v0.0.1
[INFO] [stderr]   Downloaded peresil v0.3.0
[INFO] [stderr]   Downloaded sxd-xpath v0.4.2
[INFO] [stderr]   Downloaded trackable v1.2.0
[INFO] [stderr]   Downloaded sloggers v2.1.1
[INFO] [stderr]   Downloaded bread-common v0.0.3
[INFO] [stderr]   Downloaded reflink v0.1.3
[INFO] [stderr]   Downloaded path-dedot v3.0.18
[INFO] [stderr]   Downloaded path-absolutize v3.0.14
[INFO] [stderr]   Downloaded miette-derive v5.5.0
[INFO] [stderr]   Downloaded ssri v8.0.0
[INFO] [stderr]   Downloaded serde_yaml v0.9.14
[INFO] [stderr]   Downloaded cacache v11.2.0
[INFO] [stderr]   Downloaded unsafe-libyaml v0.2.4
[INFO] [stderr]   Downloaded slog-stdlog v4.1.1
[INFO] [stderr]   Downloaded slog-kvfilter v0.7.0
[INFO] [stderr]   Downloaded slog-term v2.9.0
[INFO] [stderr]   Downloaded miette v5.5.0
[INFO] [stderr]   Downloaded security-framework v2.8.0
[INFO] [stderr]   Downloaded arc-swap v1.5.1
[INFO] [stderr]   Downloaded governor v0.5.1
[INFO] [stderr]   Downloaded windows-acl v0.3.0
[INFO] [stderr]   Downloaded cargo-manifest v0.4.0
[INFO] [stderr]   Downloaded dirs-next v1.0.2
[INFO] [stderr]   Downloaded slog-async v2.7.0
[INFO] [stderr]   Downloaded platform-dirs v0.3.0
[INFO] [stderr]   Downloaded sxd-document v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+dd2d87b6cc31907ae305875eb6be399783dc0256" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40beca0436cd0020fd2f7cc739fb1177bf50b34d89f21fe72bbb7747fe32fbb3
[INFO] running `Command { std: "docker" "start" "-a" "40beca0436cd0020fd2f7cc739fb1177bf50b34d89f21fe72bbb7747fe32fbb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40beca0436cd0020fd2f7cc739fb1177bf50b34d89f21fe72bbb7747fe32fbb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40beca0436cd0020fd2f7cc739fb1177bf50b34d89f21fe72bbb7747fe32fbb3", kill_on_drop: false }`
[INFO] [stdout] 40beca0436cd0020fd2f7cc739fb1177bf50b34d89f21fe72bbb7747fe32fbb3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+dd2d87b6cc31907ae305875eb6be399783dc0256" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 29cd53823ecf11d5b271d82a036bc3b0da060cbf4a18f3c08b696017594d8b99
[INFO] running `Command { std: "docker" "start" "-a" "29cd53823ecf11d5b271d82a036bc3b0da060cbf4a18f3c08b696017594d8b99", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/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] [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" "29cd53823ecf11d5b271d82a036bc3b0da060cbf4a18f3c08b696017594d8b99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29cd53823ecf11d5b271d82a036bc3b0da060cbf4a18f3c08b696017594d8b99", kill_on_drop: false }`
[INFO] [stdout] 29cd53823ecf11d5b271d82a036bc3b0da060cbf4a18f3c08b696017594d8b99