[INFO] fetching crate waterfall 0.8.1...
[INFO] testing waterfall-0.8.1 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate waterfall 0.8.1 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate waterfall 0.8.1
[INFO] finished tweaking crates.io crate waterfall 0.8.1
[INFO] tweaked toml for crates.io crate waterfall 0.8.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate waterfall 0.8.1 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate waterfall 0.8.1 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded histogram v0.7.1
[INFO] [stderr]   Downloaded heatmap v0.7.1
[INFO] [stderr]   Downloaded simd-adler32 v0.3.4
[INFO] [stderr]   Downloaded clocksource v0.6.0
[INFO] [stderr]   Downloaded bit_field v0.10.1
[INFO] [stderr]   Downloaded spin v0.9.5
[INFO] [stderr]   Downloaded rusttype v0.9.3
[INFO] [stderr]   Downloaded png v0.17.7
[INFO] [stderr]   Downloaded owned_ttf_parser v0.15.2
[INFO] [stderr]   Downloaded ttf-parser v0.15.2
[INFO] [stderr]   Downloaded zune-inflate v0.2.50
[INFO] [stderr]   Downloaded image v0.24.5
[INFO] [stderr]   Downloaded exr v1.5.3
[INFO] [stderr]   Downloaded gif v0.11.4
[INFO] [stderr]   Downloaded dejavu v2.37.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dd40d072b3d35c85fdf8b8f24c3aeb259e148751d5e6822ba3db3b6509d937da
[INFO] running `Command { std: "docker" "start" "-a" "dd40d072b3d35c85fdf8b8f24c3aeb259e148751d5e6822ba3db3b6509d937da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd40d072b3d35c85fdf8b8f24c3aeb259e148751d5e6822ba3db3b6509d937da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd40d072b3d35c85fdf8b8f24c3aeb259e148751d5e6822ba3db3b6509d937da", kill_on_drop: false }`
[INFO] [stdout] dd40d072b3d35c85fdf8b8f24c3aeb259e148751d5e6822ba3db3b6509d937da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40b28b839dc1fd0e4d97c8011b1519b8f77dd7bba1d37ea2af83f8481bef49c7
[INFO] running `Command { std: "docker" "start" "-a" "40b28b839dc1fd0e4d97c8011b1519b8f77dd7bba1d37ea2af83f8481bef49c7", 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 crossbeam-utils v0.8.14
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.13
[INFO] [stderr]    Compiling rayon-core v1.10.2
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling libm v0.2.6
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling futures-core v0.3.26
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling futures-sink v0.3.26
[INFO] [stderr]    Compiling time-core v0.1.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.51/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 weezl v0.1.7
[INFO] [stderr]    Compiling spin v0.9.5
[INFO] [stderr]    Compiling itoa v1.0.5
[INFO] [stderr]    Compiling crossbeam-channel v0.5.6
[INFO] [stderr]    Compiling simd-adler32 v0.3.4
[INFO] [stderr]    Compiling time v0.3.17
[INFO] [stderr]    Compiling lebe v0.5.2
[INFO] [stderr]    Compiling ttf-parser v0.15.2
[INFO] [stderr]    Compiling half v2.2.1
[INFO] [stderr]    Compiling bit_field v0.10.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.2
[INFO] [stderr]    Compiling zune-inflate v0.2.50
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling ab_glyph_rasterizer v0.1.8
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling bytemuck v1.13.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[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" "40b28b839dc1fd0e4d97c8011b1519b8f77dd7bba1d37ea2af83f8481bef49c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40b28b839dc1fd0e4d97c8011b1519b8f77dd7bba1d37ea2af83f8481bef49c7", kill_on_drop: false }`
[INFO] [stdout] 40b28b839dc1fd0e4d97c8011b1519b8f77dd7bba1d37ea2af83f8481bef49c7