[INFO] fetching crate fll-rs 0.1.4...
[INFO] testing fll-rs-0.1.4 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate fll-rs 0.1.4 into /workspace/builds/worker-7-tc1/source
[INFO] removed /workspace/builds/worker-7-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate fll-rs 0.1.4
[INFO] finished tweaking crates.io crate fll-rs 0.1.4
[INFO] tweaked toml for crates.io crate fll-rs 0.1.4 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fll-rs 0.1.4 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate fll-rs 0.1.4 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-complex v0.4.3
[INFO] [stderr]   Downloaded simba v0.7.3
[INFO] [stderr]   Downloaded safe_arch v0.6.0
[INFO] [stderr]   Downloaded ev3dev-lang-rust-derive v0.10.0
[INFO] [stderr]   Downloaded custom_derive v0.1.7
[INFO] [stderr]   Downloaded conv v0.3.3
[INFO] [stderr]   Downloaded memmap v0.7.0
[INFO] [stderr]   Downloaded half v2.2.1
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.14
[INFO] [stderr]   Downloaded flume v0.10.14
[INFO] [stderr]   Downloaded bumpalo v3.12.1
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.15
[INFO] [stderr]   Downloaded framebuffer v0.3.1
[INFO] [stderr]   Downloaded wide v0.7.8
[INFO] [stderr]   Downloaded num v0.4.0
[INFO] [stderr]   Downloaded exr v1.6.3
[INFO] [stderr]   Downloaded nalgebra v0.30.1
[INFO] [stderr]   Downloaded matrixmultiply v0.3.7
[INFO] [stderr]   Downloaded libc v0.2.143
[INFO] [stderr]   Downloaded gif v0.12.0
[INFO] [stderr]   Downloaded jpeg-decoder v0.3.0
[INFO] [stderr]   Downloaded tiff v0.8.1
[INFO] [stderr]   Downloaded imageproc v0.23.0
[INFO] [stderr]   Downloaded ev3dev-lang-rust v0.12.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c867b0cadcacc1915c2f177fb0c5882c0b30acdc51f7c15655c9af0e94abdd5e
[INFO] running `Command { std: "docker" "start" "-a" "c867b0cadcacc1915c2f177fb0c5882c0b30acdc51f7c15655c9af0e94abdd5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c867b0cadcacc1915c2f177fb0c5882c0b30acdc51f7c15655c9af0e94abdd5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c867b0cadcacc1915c2f177fb0c5882c0b30acdc51f7c15655c9af0e94abdd5e", kill_on_drop: false }`
[INFO] [stdout] c867b0cadcacc1915c2f177fb0c5882c0b30acdc51f7c15655c9af0e94abdd5e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49b669849d3dc7342a98bfaf91cf75ea065f71eff07fbd0e13d55da5c5fcd472
[INFO] running `Command { std: "docker" "start" "-a" "49b669849d3dc7342a98bfaf91cf75ea065f71eff07fbd0e13d55da5c5fcd472", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.143
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling simd-adler32 v0.3.5
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling bytemuck v1.13.1
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling weezl v0.1.7
[INFO] [stderr]    Compiling futures-sink v0.3.28
[INFO] [stderr]    Compiling paste v1.0.12
[INFO] [stderr]    Compiling safe_arch v0.6.0
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling miniz_oxide v0.7.1
[INFO] [stderr]    Compiling fdeflate v0.3.0
[INFO] [stderr]    Compiling zune-inflate v0.2.54
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/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 num-rational v0.4.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling matrixmultiply v0.3.7
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[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" "49b669849d3dc7342a98bfaf91cf75ea065f71eff07fbd0e13d55da5c5fcd472", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49b669849d3dc7342a98bfaf91cf75ea065f71eff07fbd0e13d55da5c5fcd472", kill_on_drop: false }`
[INFO] [stdout] 49b669849d3dc7342a98bfaf91cf75ea065f71eff07fbd0e13d55da5c5fcd472
