[INFO] fetching crate qrscan 0.1.8...
[INFO] checking qrscan-0.1.8 against master#158f00a1c5175648af6f6099b075f78d1d014a28 for pr-121251
[INFO] extracting crate qrscan 0.1.8 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate qrscan 0.1.8 on toolchain 158f00a1c5175648af6f6099b075f78d1d014a28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate qrscan 0.1.8
[INFO] finished tweaking crates.io crate qrscan 0.1.8
[INFO] tweaked toml for crates.io crate qrscan 0.1.8 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate qrscan 0.1.8 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" "+158f00a1c5175648af6f6099b075f78d1d014a28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nokhwa-bindings-windows v0.4.0
[INFO] [stderr]   Downloaded cocoa v0.20.2
[INFO] [stderr]   Downloaded dunce v1.0.3
[INFO] [stderr]   Downloaded g2p v1.0.1
[INFO] [stderr]   Downloaded v4l2-sys-mit v0.2.0
[INFO] [stderr]   Downloaded nasm-rs v0.2.4
[INFO] [stderr]   Downloaded g2poly v1.0.1
[INFO] [stderr]   Downloaded core-media-sys v0.1.2
[INFO] [stderr]   Downloaded csscolorparser v0.6.2
[INFO] [stderr]   Downloaded g2gen v1.0.1
[INFO] [stderr]   Downloaded nokhwa-core v0.1.0
[INFO] [stderr]   Downloaded mozjpeg v0.9.4
[INFO] [stderr]   Downloaded v4l v0.13.1
[INFO] [stderr]   Downloaded nokhwa v0.10.3
[INFO] [stderr]   Downloaded exr v1.5.3
[INFO] [stderr]   Downloaded qrencode v0.14.0
[INFO] [stderr]   Downloaded metal v0.18.0
[INFO] [stderr]   Downloaded mozjpeg-sys v1.0.6
[INFO] [stderr]   Downloaded simd-adler32 v0.3.4
[INFO] [stderr]   Downloaded zune-inflate v0.2.50
[INFO] [stderr]   Downloaded viuer v0.6.2
[INFO] [stderr]   Downloaded ansi_colours v1.2.1
[INFO] [stderr]   Downloaded nokhwa-bindings-linux v0.1.0
[INFO] [stderr]   Downloaded nokhwa-bindings-macos v0.2.0
[INFO] [stderr]   Downloaded rqrr v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0890f559593cf28433f906a3dcbd330162fc74b79b8ab1bb455e03cb2463c33
[INFO] running `Command { std: "docker" "start" "-a" "d0890f559593cf28433f906a3dcbd330162fc74b79b8ab1bb455e03cb2463c33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0890f559593cf28433f906a3dcbd330162fc74b79b8ab1bb455e03cb2463c33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0890f559593cf28433f906a3dcbd330162fc74b79b8ab1bb455e03cb2463c33", kill_on_drop: false }`
[INFO] [stdout] d0890f559593cf28433f906a3dcbd330162fc74b79b8ab1bb455e03cb2463c33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 27a3ad56eb9c38fd9cdfb20bb2d97d6ce16db2c37a64390831f644cafb085c62
[INFO] running `Command { std: "docker" "start" "-a" "27a3ad56eb9c38fd9cdfb20bb2d97d6ce16db2c37a64390831f644cafb085c62", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling proc-macro2 v1.0.51
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]    Compiling rayon-core v1.10.2
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling futures-core v0.3.26
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/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]     Checking crossbeam-channel v0.5.7
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "27a3ad56eb9c38fd9cdfb20bb2d97d6ce16db2c37a64390831f644cafb085c62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27a3ad56eb9c38fd9cdfb20bb2d97d6ce16db2c37a64390831f644cafb085c62", kill_on_drop: false }`
[INFO] [stdout] 27a3ad56eb9c38fd9cdfb20bb2d97d6ce16db2c37a64390831f644cafb085c62
