[INFO] fetching crate bitcoin_rpc_client 0.6.1...
[INFO] testing bitcoin_rpc_client-0.6.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate bitcoin_rpc_client 0.6.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate bitcoin_rpc_client 0.6.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/rust-toolchain
[INFO] started tweaking crates.io crate bitcoin_rpc_client 0.6.1
[INFO] finished tweaking crates.io crate bitcoin_rpc_client 0.6.1
[INFO] tweaked toml for crates.io crate bitcoin_rpc_client 0.6.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitcoin-bech32 v0.9.0
[INFO] [stderr]   Downloaded testcontainers v0.7.0
[INFO] [stderr]   Downloaded tc_coblox_bitcoincore v0.5.1
[INFO] [stderr]   Downloaded tc_core v0.3.1
[INFO] [stderr]   Downloaded tc_trufflesuite_ganachecli v0.4.1
[INFO] [stderr]   Downloaded bech32 v0.6.0
[INFO] [stderr]   Downloaded tc_generic v0.2.1
[INFO] [stderr]   Downloaded debug_stub_derive v0.3.0
[INFO] [stderr]   Downloaded tc_dynamodb_local v0.2.1
[INFO] [stderr]   Downloaded tc_postgres v0.2.0
[INFO] [stderr]   Downloaded tc_cli_client v0.2.1
[INFO] [stderr]   Downloaded bitcoin v0.18.2
[INFO] [stderr]   Downloaded tc_redis v0.2.1
[INFO] [stderr]   Downloaded bitcoin_hashes v0.3.2
[INFO] [stderr]   Downloaded tc_parity_parity v0.5.1
[INFO] [stderr]   Downloaded jsonrpc_client v0.2.0
[INFO] [stderr]   Downloaded tc_elasticmq v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c753063e1db8dc8109c8cc128d5eaaec0722271dbc1fc7ebc662776c0f4b1c0c
[INFO] running `Command { std: "docker" "start" "-a" "c753063e1db8dc8109c8cc128d5eaaec0722271dbc1fc7ebc662776c0f4b1c0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c753063e1db8dc8109c8cc128d5eaaec0722271dbc1fc7ebc662776c0f4b1c0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c753063e1db8dc8109c8cc128d5eaaec0722271dbc1fc7ebc662776c0f4b1c0c", kill_on_drop: false }`
[INFO] [stdout] c753063e1db8dc8109c8cc128d5eaaec0722271dbc1fc7ebc662776c0f4b1c0c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76a185afee17f7121d5a8d9353211cab0dd66cf8865de216e6023fdae599f5bb
[INFO] running `Command { std: "docker" "start" "-a" "76a185afee17f7121d5a8d9353211cab0dd66cf8865de216e6023fdae599f5bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.26
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling object v0.23.0
[INFO] [stderr]    Compiling bech32 v0.6.0
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling url v1.7.2
[INFO] [stderr]    Compiling flate2 v1.0.21
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling serde_test v1.0.130
[INFO] [stderr]    Compiling bitcoin_hashes v0.3.2
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling bitcoin-bech32 v0.9.0
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling http v0.1.21
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling openssl-sys v0.9.66
[INFO] [stderr]    Compiling secp256k1 v0.12.2
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling addr2line v0.14.1
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling openssl v0.10.36
[INFO] [stderr]    Compiling native-tls v0.2.8
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling http-body v0.1.0
[INFO] [stderr]    Compiling backtrace v0.3.57
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling bitcoin v0.18.2
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling hyper v0.12.36
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling reqwest v0.9.24
[INFO] [stderr]    Compiling jsonrpc_client v0.2.0
[INFO] [stderr]    Compiling bitcoin_rpc_client v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0603]: module `export` is private
[INFO] [stdout]    --> src/types/keys.rs:2:17
[INFO] [stdout]     |
[INFO] [stdout] 2   | use serde::{de, export::fmt, Deserialize, Deserializer, Serialize, Serializer};
[INFO] [stdout]     |                 ^^^^^^ private module
[INFO] [stdout]     |
[INFO] [stdout] note: the module `export` is defined here
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde-1.0.130/src/lib.rs:275:5
[INFO] [stdout]     |
[INFO] [stdout] 275 | use self::__private as export;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0603`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `bitcoin_rpc_client` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "76a185afee17f7121d5a8d9353211cab0dd66cf8865de216e6023fdae599f5bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76a185afee17f7121d5a8d9353211cab0dd66cf8865de216e6023fdae599f5bb", kill_on_drop: false }`
[INFO] [stdout] 76a185afee17f7121d5a8d9353211cab0dd66cf8865de216e6023fdae599f5bb