[INFO] fetching crate floatx4 1.1.0...
[INFO] testing floatx4-1.1.0 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate floatx4 1.1.0 into /workspace/builds/worker-6-tc1/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-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate floatx4 1.1.0 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded approximately v1.1.0
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6bf6158530c0ac73209ce542ab9a7739a4ede2c89bfbd26ab7798a5758b5ee13
[INFO] running `Command { std: "docker" "start" "-a" "6bf6158530c0ac73209ce542ab9a7739a4ede2c89bfbd26ab7798a5758b5ee13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6bf6158530c0ac73209ce542ab9a7739a4ede2c89bfbd26ab7798a5758b5ee13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bf6158530c0ac73209ce542ab9a7739a4ede2c89bfbd26ab7798a5758b5ee13", kill_on_drop: false }`
[INFO] [stdout] 6bf6158530c0ac73209ce542ab9a7739a4ede2c89bfbd26ab7798a5758b5ee13
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 74fca67b61bb8e93f68d28a8cc938169c754a6235b261cec62b1f834ab60a04b
[INFO] running `Command { std: "docker" "start" "-a" "74fca67b61bb8e93f68d28a8cc938169c754a6235b261cec62b1f834ab60a04b", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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" "74fca67b61bb8e93f68d28a8cc938169c754a6235b261cec62b1f834ab60a04b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74fca67b61bb8e93f68d28a8cc938169c754a6235b261cec62b1f834ab60a04b", kill_on_drop: false }`
[INFO] [stdout] 74fca67b61bb8e93f68d28a8cc938169c754a6235b261cec62b1f834ab60a04b