[INFO] fetching crate rust-mnist 0.2.0... [INFO] building rust-mnist-0.2.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2 [INFO] extracting crate rust-mnist 0.2.0 into /workspace/builds/worker-2-tc2/source [INFO] started tweaking crates.io crate rust-mnist 0.2.0 [INFO] finished tweaking crates.io crate rust-mnist 0.2.0 [INFO] tweaked toml for crates.io crate rust-mnist 0.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate rust-mnist 0.2.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate crates.io crate rust-mnist 0.2.0 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0de8a8c2b08dca0462b59bd360376d38413d3c62b30a194b7fb61ebb345f8d58 [INFO] running `Command { std: "docker" "start" "-a" "0de8a8c2b08dca0462b59bd360376d38413d3c62b30a194b7fb61ebb345f8d58", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0de8a8c2b08dca0462b59bd360376d38413d3c62b30a194b7fb61ebb345f8d58", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0de8a8c2b08dca0462b59bd360376d38413d3c62b30a194b7fb61ebb345f8d58", kill_on_drop: false }` [INFO] [stdout] 0de8a8c2b08dca0462b59bd360376d38413d3c62b30a194b7fb61ebb345f8d58 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] c3416e14f672d04f2dacefa348cf7a60d4882860433b114532db985b543d2026 [INFO] running `Command { std: "docker" "start" "-a" "c3416e14f672d04f2dacefa348cf7a60d4882860433b114532db985b543d2026", kill_on_drop: false }` [INFO] [stderr] Compiling rust-mnist v0.2.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s [INFO] running `Command { std: "docker" "inspect" "c3416e14f672d04f2dacefa348cf7a60d4882860433b114532db985b543d2026", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c3416e14f672d04f2dacefa348cf7a60d4882860433b114532db985b543d2026", kill_on_drop: false }` [INFO] [stdout] c3416e14f672d04f2dacefa348cf7a60d4882860433b114532db985b543d2026 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3f50931c6e66ccef6f1d2ee5c5abe3950766051812ccc38c9cd3018670cf1dcc [INFO] running `Command { std: "docker" "start" "-a" "3f50931c6e66ccef6f1d2ee5c5abe3950766051812ccc38c9cd3018670cf1dcc", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.139 [INFO] [stderr] Compiling proc-macro2 v1.0.49 [INFO] [stderr] Compiling crossbeam-utils v0.8.14 [INFO] [stderr] Compiling syn v1.0.107 [INFO] [stderr] Compiling memoffset v0.7.1 [INFO] [stderr] Compiling serde_derive v1.0.151 [INFO] [stderr] Compiling crossbeam-epoch v0.9.13 [INFO] [stderr] Compiling serde v1.0.151 [INFO] [stderr] Compiling indexmap v1.9.2 [INFO] [stderr] Compiling serde_json v1.0.91 [INFO] [stderr] Compiling either v1.8.0 [INFO] [stderr] Compiling rayon-core v1.10.1 [INFO] [stderr] Compiling plotters-backend v0.3.4 [INFO] [stderr] Compiling half v1.8.2 [INFO] [stderr] Compiling ciborium-io v0.2.0 [INFO] [stderr] Compiling itoa v1.0.5 [INFO] [stderr] Compiling ryu v1.0.12 [INFO] [stderr] Compiling clap_lex v0.2.4 [INFO] [stderr] Compiling regex-syntax v0.6.28 [INFO] [stderr] Compiling ciborium-ll v0.2.0 [INFO] [stderr] Compiling itertools v0.10.5 [INFO] [stderr] Compiling textwrap v0.16.0 [INFO] [stderr] Compiling cast v0.3.0 [INFO] [stderr] Compiling walkdir v2.3.2 [INFO] [stderr] Compiling plotters-svg v0.3.3 [INFO] [stderr] Compiling anes v0.1.6 [INFO] [stderr] Compiling oorandom v11.1.3 [INFO] [stderr] Compiling plotters v0.3.4 [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 crossbeam-channel v0.5.6 [INFO] [stderr] Compiling clap v3.2.23 [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" "3f50931c6e66ccef6f1d2ee5c5abe3950766051812ccc38c9cd3018670cf1dcc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3f50931c6e66ccef6f1d2ee5c5abe3950766051812ccc38c9cd3018670cf1dcc", kill_on_drop: false }` [INFO] [stdout] 3f50931c6e66ccef6f1d2ee5c5abe3950766051812ccc38c9cd3018670cf1dcc