[INFO] fetching crate floatx4 1.1.0...
[INFO] checking floatx4-1.1.0 against try#a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399 for pr-145770
[INFO] extracting crate floatx4 1.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate floatx4 1.1.0
[INFO] finished tweaking crates.io crate floatx4 1.1.0
[INFO] tweaked toml for crates.io crate floatx4 1.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate floatx4 1.1.0 on toolchain a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to latest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9158b01ed0926dd5580aef163df18ecf6003d2fb67b7c3453ca7e4306c6ae7bf
[INFO] running `Command { std: "docker" "start" "-a" "9158b01ed0926dd5580aef163df18ecf6003d2fb67b7c3453ca7e4306c6ae7bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9158b01ed0926dd5580aef163df18ecf6003d2fb67b7c3453ca7e4306c6ae7bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9158b01ed0926dd5580aef163df18ecf6003d2fb67b7c3453ca7e4306c6ae7bf", kill_on_drop: false }`
[INFO] [stdout] 9158b01ed0926dd5580aef163df18ecf6003d2fb67b7c3453ca7e4306c6ae7bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+a2a6e871b05c7b8ecc9a3c8a20db1f39e995e399" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed7075030597d479bad4df2c81fe3e85e21114aa90eab4b607763458b6c5ab0c
[INFO] running `Command { std: "docker" "start" "-a" "ed7075030597d479bad4df2c81fe3e85e21114aa90eab4b607763458b6c5ab0c", kill_on_drop: false }`
[INFO] [stderr]     Checking approximately v1.1.0
[INFO] [stdout] error[E0635]: unknown feature `cfg_match`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/approximately-1.1.0/src/lib.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | #![feature(cfg_match)]
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `approximately` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "ed7075030597d479bad4df2c81fe3e85e21114aa90eab4b607763458b6c5ab0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed7075030597d479bad4df2c81fe3e85e21114aa90eab4b607763458b6c5ab0c", kill_on_drop: false }`
[INFO] [stdout] ed7075030597d479bad4df2c81fe3e85e21114aa90eab4b607763458b6c5ab0c
