[INFO] fetching crate fluffl 0.0.5...
[INFO] checking fluffl-0.0.5 against master#8a703520e80d87d4423c01f9d4fbc9e5f6533a02 for pr-154205-1
[INFO] extracting crate fluffl 0.0.5 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate fluffl 0.0.5
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate fluffl 0.0.5
[INFO] tweaked toml for crates.io crate fluffl 0.0.5 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fluffl 0.0.5 on toolchain 8a703520e80d87d4423c01f9d4fbc9e5f6533a02
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fluffl 0.0.5 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" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 492771634ef992dc1249cb6e4a32d5984c30535be98944855410733f31415ad2
[INFO] running `Command { std: "docker" "start" "-a" "492771634ef992dc1249cb6e4a32d5984c30535be98944855410733f31415ad2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "492771634ef992dc1249cb6e4a32d5984c30535be98944855410733f31415ad2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "492771634ef992dc1249cb6e4a32d5984c30535be98944855410733f31415ad2", kill_on_drop: false }`
[INFO] [stdout] 492771634ef992dc1249cb6e4a32d5984c30535be98944855410733f31415ad2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8a703520e80d87d4423c01f9d4fbc9e5f6533a02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c77d7894f00af32c7c38e3674ecaeee1a28de8834f23f5b8b0895ffa3239ce0
[INFO] running `Command { std: "docker" "start" "-a" "3c77d7894f00af32c7c38e3674ecaeee1a28de8834f23f5b8b0895ffa3239ce0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.135
[INFO] [stderr]    Compiling xml-rs v0.8.4
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking downcast-rs v1.2.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking libloading v0.7.3
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]     Checking libloading v0.6.7
[INFO] [stderr]     Checking dlib v0.5.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a feature with a similar name: `proc_macro_span_file`
[INFO] [stdout]    |
[INFO] [stdout] 92 -     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout] 92 +     feature(proc_macro_span, proc_macro_span_file)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking once_cell v1.15.0
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking dlib v0.4.2
[INFO] [stderr]     Checking stb_truetype v0.3.1
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]     Checking cty v0.2.2
[INFO] [stderr]     Checking wayland-sys v0.23.6
[INFO] [stderr]    Compiling serde_derive v1.0.146
[INFO] [stderr]    Compiling wayland-sys v0.29.5
[INFO] [stderr]    Compiling x11-dl v2.20.0
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking raw-window-handle v0.4.3
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking percent-encoding v2.2.0
[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" "3c77d7894f00af32c7c38e3674ecaeee1a28de8834f23f5b8b0895ffa3239ce0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c77d7894f00af32c7c38e3674ecaeee1a28de8834f23f5b8b0895ffa3239ce0", kill_on_drop: false }`
[INFO] [stdout] 3c77d7894f00af32c7c38e3674ecaeee1a28de8834f23f5b8b0895ffa3239ce0