[INFO] cloning repository https://github.com/AtsukiTak/btc-observer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AtsukiTak/btc-observer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAtsukiTak%2Fbtc-observer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAtsukiTak%2Fbtc-observer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 185fc3168acdfcdd8d6bba468c249138335af9cd
[INFO] checking AtsukiTak/btc-observer/185fc3168acdfcdd8d6bba468c249138335af9cd against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAtsukiTak%2Fbtc-observer" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AtsukiTak/btc-observer on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/AtsukiTak/btc-observer
[INFO] finished tweaking git repo https://github.com/AtsukiTak/btc-observer
[INFO] tweaked toml for git repo https://github.com/AtsukiTak/btc-observer written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/AtsukiTak/btc-observer 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d6a2976cc68ce902d9bb8596fe512fb823a6972aaef20823dc1fd98b6d4a4cbd
[INFO] running `Command { std: "docker" "start" "-a" "d6a2976cc68ce902d9bb8596fe512fb823a6972aaef20823dc1fd98b6d4a4cbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d6a2976cc68ce902d9bb8596fe512fb823a6972aaef20823dc1fd98b6d4a4cbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6a2976cc68ce902d9bb8596fe512fb823a6972aaef20823dc1fd98b6d4a4cbd", kill_on_drop: false }`
[INFO] [stdout] d6a2976cc68ce902d9bb8596fe512fb823a6972aaef20823dc1fd98b6d4a4cbd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dtail_expr_drop_order" "-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 858fc14251d98ca1822ea76c961d8bda23808c10620452dbc02057be3cf5bed3
[INFO] running `Command { std: "docker" "start" "-a" "858fc14251d98ca1822ea76c961d8bda23808c10620452dbc02057be3cf5bed3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.42
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling autocfg v0.1.5
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling cc v1.0.26
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]     Checking safemem v0.3.1
[INFO] [stderr]     Checking bech32 v0.6.0
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking bitcoin-bech32 v0.9.0
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking num_cpus v1.10.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling secp256k1 v0.12.2
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking bitcoin_hashes v0.3.2
[INFO] [stderr]     Checking strason v0.4.0
[INFO] [stderr]     Checking serde_test v1.0.98
[INFO] [stderr]     Checking bitcoin-amount v0.1.4
[INFO] [stderr]     Checking jsonrpc v0.11.0
[INFO] [stderr]     Checking bitcoin v0.18.0
[INFO] [stderr]     Checking bitcoincore-rpc-json v0.7.0
[INFO] [stderr]     Checking bitcoincore-rpc v0.7.0
[INFO] [stderr]     Checking chain-observer v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `txid`, `receiver`, and `sender` are never read
[INFO] [stdout]   --> src/observer.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Observed {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 11 |     pub txid: Txid,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 12 |     pub receiver: Address,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 13 |     pub sender: Address,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Observed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `txid`, `receiver`, and `sender` are never read
[INFO] [stdout]   --> src/observer.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct Observed {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 11 |     pub txid: Txid,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 12 |     pub receiver: Address,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 13 |     pub sender: Address,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Observed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 20.82s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: serde_test v1.0.98, traitobject v0.1.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "858fc14251d98ca1822ea76c961d8bda23808c10620452dbc02057be3cf5bed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "858fc14251d98ca1822ea76c961d8bda23808c10620452dbc02057be3cf5bed3", kill_on_drop: false }`
[INFO] [stdout] 858fc14251d98ca1822ea76c961d8bda23808c10620452dbc02057be3cf5bed3