[INFO] fetching crate flatland 0.7.0...
[INFO] testing flatland-0.7.0 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate flatland 0.7.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate flatland 0.7.0
[INFO] finished tweaking crates.io crate flatland 0.7.0
[INFO] tweaked toml for crates.io crate flatland 0.7.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate flatland 0.7.0 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate flatland 0.7.0 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" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5dc3cfe3949a79cbee6606ce1571f58f35b13f30523c382041509e343ed9242c
[INFO] running `Command { std: "docker" "start" "-a" "5dc3cfe3949a79cbee6606ce1571f58f35b13f30523c382041509e343ed9242c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5dc3cfe3949a79cbee6606ce1571f58f35b13f30523c382041509e343ed9242c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5dc3cfe3949a79cbee6606ce1571f58f35b13f30523c382041509e343ed9242c", kill_on_drop: false }`
[INFO] [stdout] 5dc3cfe3949a79cbee6606ce1571f58f35b13f30523c382041509e343ed9242c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b091c5b38b9855abd70271cf76d9db6efeea01f81eb35ee528afc2488f64c4ef
[INFO] running `Command { std: "docker" "start" "-a" "b091c5b38b9855abd70271cf76d9db6efeea01f81eb35ee528afc2488f64c4ef", 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 autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling once_cell v1.17.0
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling parking_lot_core v0.9.5
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling aliasable v0.1.3
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling tracing-core v0.1.30
[INFO] [stderr]    Compiling anyhow v1.0.68
[INFO] [stderr]    Compiling bytes v1.3.0
[INFO] [stderr]    Compiling half v1.8.2
[INFO] [stderr]    Compiling iana-time-zone v0.1.53
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling tokio v1.23.1
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling rustc-hash 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-macro2-1.0.49/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling flagset v0.4.3
[INFO] [stderr]    Compiling input-event-codes v5.16.8
[INFO] [stderr]    Compiling quick-xml v0.22.0
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling socket2 v0.4.7
[INFO] [stderr]    Compiling mio v0.8.5
[INFO] [stderr]    Compiling num_cpus v1.15.0
[INFO] [stderr]    Compiling dirs-sys v0.3.7
[INFO] [stderr]    Compiling time v0.1.45
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling memmap2 v0.5.8
[INFO] [stderr]    Compiling cluFlock v1.2.7
[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" "b091c5b38b9855abd70271cf76d9db6efeea01f81eb35ee528afc2488f64c4ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b091c5b38b9855abd70271cf76d9db6efeea01f81eb35ee528afc2488f64c4ef", kill_on_drop: false }`
[INFO] [stdout] b091c5b38b9855abd70271cf76d9db6efeea01f81eb35ee528afc2488f64c4ef