[INFO] fetching crate mcp4728 0.1.0...
[INFO] testing mcp4728-0.1.0 against try#fc4ba03ef77ca5018fb78a097d3b924d30f15bfc+target=i686-unknown-linux-musl for musl_upgrade_1_2_take4
[INFO] extracting crate mcp4728 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mcp4728 0.1.0 on toolchain fc4ba03ef77ca5018fb78a097d3b924d30f15bfc
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mcp4728 0.1.0
[INFO] finished tweaking crates.io crate mcp4728 0.1.0
[INFO] tweaked toml for crates.io crate mcp4728 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18a97048c33237b6655551df44424b3c832e9f5532010e7b4de7ee89a4c9a606
[INFO] running `Command { std: "docker" "start" "-a" "18a97048c33237b6655551df44424b3c832e9f5532010e7b4de7ee89a4c9a606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18a97048c33237b6655551df44424b3c832e9f5532010e7b4de7ee89a4c9a606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18a97048c33237b6655551df44424b3c832e9f5532010e7b4de7ee89a4c9a606", kill_on_drop: false }`
[INFO] [stdout] 18a97048c33237b6655551df44424b3c832e9f5532010e7b4de7ee89a4c9a606
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "build" "--frozen" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] a9ffb5102f84c65360260a4b241765bcac9237aacd581428104dc6ea822b3e14
[INFO] running `Command { std: "docker" "start" "-a" "a9ffb5102f84c65360260a4b241765bcac9237aacd581428104dc6ea822b3e14", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling nb v1.0.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling num_enum_derive v0.5.7
[INFO] [stderr]    Compiling num_enum v0.5.7
[INFO] [stderr]    Compiling mcp4728 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.30s
[INFO] running `Command { std: "docker" "inspect" "a9ffb5102f84c65360260a4b241765bcac9237aacd581428104dc6ea822b3e14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9ffb5102f84c65360260a4b241765bcac9237aacd581428104dc6ea822b3e14", kill_on_drop: false }`
[INFO] [stdout] a9ffb5102f84c65360260a4b241765bcac9237aacd581428104dc6ea822b3e14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--no-run" "--message-format=json" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] f0ba104f7231c1e9dfd76bd6b63ddaead3b82855c949a25218f569f7b39749e2
[INFO] running `Command { std: "docker" "start" "-a" "f0ba104f7231c1e9dfd76bd6b63ddaead3b82855c949a25218f569f7b39749e2", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling cast v0.3.0
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling serial-core v0.4.0
[INFO] [stderr]    Compiling termios v0.2.2
[INFO] [stderr]    Compiling ioctl-rs v0.1.6
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling serial-unix v0.4.0
[INFO] [stderr]    Compiling embedded-hal-mock v0.8.0
[INFO] [stderr]    Compiling mcp4728 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling nix v0.23.2
[INFO] [stderr]    Compiling i2cdev v0.5.1
[INFO] [stderr]    Compiling gpio-cdev v0.5.1
[INFO] [stderr]    Compiling spidev v0.5.1
[INFO] [stderr]    Compiling sysfs_gpio v0.6.1
[INFO] [stderr]    Compiling linux-embedded-hal v0.3.2
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 8.19s
[INFO] running `Command { std: "docker" "inspect" "f0ba104f7231c1e9dfd76bd6b63ddaead3b82855c949a25218f569f7b39749e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0ba104f7231c1e9dfd76bd6b63ddaead3b82855c949a25218f569f7b39749e2", kill_on_drop: false }`
[INFO] [stdout] f0ba104f7231c1e9dfd76bd6b63ddaead3b82855c949a25218f569f7b39749e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+fc4ba03ef77ca5018fb78a097d3b924d30f15bfc" "test" "--frozen" "--target" "i686-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] abf69569704662b8c3d72c0915e2978ac33bef7819a6dd61effd7a5ac38b728d
[INFO] running `Command { std: "docker" "start" "-a" "abf69569704662b8c3d72c0915e2978ac33bef7819a6dd61effd7a5ac38b728d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.48s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/i686-unknown-linux-musl/debug/deps/mcp4728-8d2332429e36c5b0)
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test tests::fast_write ... ok
[INFO] [stdout] test tests::fast_write_i2c_error ... ok
[INFO] [stdout] test tests::fast_write_out_of_bounds_error ... ok
[INFO] [stdout] test tests::multi_write_multiple_values ... ok
[INFO] [stdout] test tests::multi_write_set_all_values ... ok
[INFO] [stdout] test tests::fast_write_with_power_down_mode ... ok
[INFO] [stdout] test tests::read ... ok
[INFO] [stdout] test tests::sequential_write_multiple_values ... ok
[INFO] [stdout] test tests::sequential_write_too_many_values ... ok
[INFO] [stdout] test tests::single_write_default_values ... ok
[INFO] [stdout] test tests::single_write_out_of_bounds_error ... ok
[INFO] [stdout] test tests::single_write_set_all_values ... ok
[INFO] [stdout] test tests::write_gain_mode ... ok
[INFO] [stdout] test tests::write_power_down_mode ... ok
[INFO] [stdout] test tests::write_voltage_reference_mode ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "abf69569704662b8c3d72c0915e2978ac33bef7819a6dd61effd7a5ac38b728d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abf69569704662b8c3d72c0915e2978ac33bef7819a6dd61effd7a5ac38b728d", kill_on_drop: false }`
[INFO] [stdout] abf69569704662b8c3d72c0915e2978ac33bef7819a6dd61effd7a5ac38b728d