[INFO] fetching crate ugrad 0.1.0...
[INFO] testing ugrad-0.1.0 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate ugrad 0.1.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate ugrad 0.1.0
[INFO] finished tweaking crates.io crate ugrad 0.1.0
[INFO] tweaked toml for crates.io crate ugrad 0.1.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ugrad 0.1.0 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ugrad 0.1.0 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" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded renderdoc-sys v0.7.1
[INFO] [stderr]   Downloaded gpu-descriptor-types v0.1.1
[INFO] [stderr]   Downloaded spirv v0.2.0+1.5.4
[INFO] [stderr]   Downloaded ndarray-rand v0.14.0
[INFO] [stderr]   Downloaded bytemuck_derive v1.4.0
[INFO] [stderr]   Downloaded curl v0.4.44
[INFO] [stderr]   Downloaded web-sys v0.3.61
[INFO] [stderr]   Downloaded wgpu-core v0.15.1
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.34
[INFO] [stderr]   Downloaded slotmap v1.0.6
[INFO] [stderr]   Downloaded gimli v0.27.2
[INFO] [stderr]   Downloaded mnist v0.5.0
[INFO] [stderr]   Downloaded curl-sys v0.4.60+curl-7.88.1
[INFO] [stderr]   Downloaded daggy v0.8.0
[INFO] [stderr]   Downloaded ron v0.8.0
[INFO] [stderr]   Downloaded bytemuck v1.13.0
[INFO] [stderr]   Downloaded gpu-alloc v0.5.3
[INFO] [stderr]   Downloaded com-rs v0.2.1
[INFO] [stderr]   Downloaded arrayvec v0.7.2
[INFO] [stderr]   Downloaded naga v0.11.0
[INFO] [stderr]   Downloaded ash v0.37.2+1.3.238
[INFO] [stderr]   Downloaded libm v0.2.6
[INFO] [stderr]   Downloaded gpu-alloc-types v0.2.0
[INFO] [stderr]   Downloaded wgpu-types v0.15.1
[INFO] [stderr]   Downloaded petgraph v0.6.3
[INFO] [stderr]   Downloaded dot v0.1.4
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.14
[INFO] [stderr]   Downloaded pbr v1.1.1
[INFO] [stderr]   Downloaded num-complex v0.4.3
[INFO] [stderr]   Downloaded d3d12 v0.6.0
[INFO] [stderr]   Downloaded backtrace v0.3.67
[INFO] [stderr]   Downloaded gpu-descriptor v0.2.3
[INFO] [stderr]   Downloaded widestring v0.5.1
[INFO] [stderr]   Downloaded hassle-rs v0.9.0
[INFO] [stderr]   Downloaded objc_exception v0.1.2
[INFO] [stderr]   Downloaded raw-window-handle v0.5.0
[INFO] [stderr]   Downloaded object v0.30.3
[INFO] [stderr]   Downloaded khronos-egl v4.1.0
[INFO] [stderr]   Downloaded wgpu-hal v0.15.2
[INFO] [stderr]   Downloaded metal v0.24.0
[INFO] [stderr]   Downloaded libz-sys v1.1.8
[INFO] [stderr]   Downloaded wgpu v0.15.1
[INFO] [stderr]   Downloaded glow v0.12.0
[INFO] [stderr]   Downloaded gpu-allocator v0.22.0
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da0de8fefb44a7e2bcc5c631030d33cfb7ecf5c75b4b4f935cd02c0a4f2c32fd
[INFO] running `Command { std: "docker" "start" "-a" "da0de8fefb44a7e2bcc5c631030d33cfb7ecf5c75b4b4f935cd02c0a4f2c32fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da0de8fefb44a7e2bcc5c631030d33cfb7ecf5c75b4b4f935cd02c0a4f2c32fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da0de8fefb44a7e2bcc5c631030d33cfb7ecf5c75b4b4f935cd02c0a4f2c32fd", kill_on_drop: false }`
[INFO] [stdout] da0de8fefb44a7e2bcc5c631030d33cfb7ecf5c75b4b4f935cd02c0a4f2c32fd
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 513f730d54aa99b51cd84b3c2017bd5571fcf86ad74e9d68a7efe4f1909705c9
[INFO] running `Command { std: "docker" "start" "-a" "513f730d54aa99b51cd84b3c2017bd5571fcf86ad74e9d68a7efe4f1909705c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling serde_derive v1.0.152
[INFO] [stderr]    Compiling libm v0.2.6
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.51/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 smallvec v1.10.0
[INFO] [stderr]    Compiling termcolor v1.2.0
[INFO] [stderr]    Compiling thiserror v1.0.38
[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] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "513f730d54aa99b51cd84b3c2017bd5571fcf86ad74e9d68a7efe4f1909705c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "513f730d54aa99b51cd84b3c2017bd5571fcf86ad74e9d68a7efe4f1909705c9", kill_on_drop: false }`
[INFO] [stdout] 513f730d54aa99b51cd84b3c2017bd5571fcf86ad74e9d68a7efe4f1909705c9