[INFO] cloning repository https://github.com/mimblewimble/grin-wallet
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mimblewimble/grin-wallet" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmimblewimble%2Fgrin-wallet", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmimblewimble%2Fgrin-wallet'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 930a44d456b43172fc096eda0bbf6a3841f48c6a
[INFO] checking mimblewimble/grin-wallet against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmimblewimble%2Fgrin-wallet" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mimblewimble/grin-wallet
[INFO] finished tweaking git repo https://github.com/mimblewimble/grin-wallet
[INFO] tweaked toml for git repo https://github.com/mimblewimble/grin-wallet written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mimblewimble/grin-wallet on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mimblewimble/grin-wallet 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b9238cfb820a893e58866bb4055549df37889e4e26c68e2a46997d0534d9f7f
[INFO] running `Command { std: "docker" "start" "-a" "2b9238cfb820a893e58866bb4055549df37889e4e26c68e2a46997d0534d9f7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b9238cfb820a893e58866bb4055549df37889e4e26c68e2a46997d0534d9f7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b9238cfb820a893e58866bb4055549df37889e4e26c68e2a46997d0534d9f7f", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "7f05092d8d4d81add8d0777bac503ec68ae450f53b3f5521570ac3e4753c980e", kill_on_drop: false }`
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[INFO] [stdout] warning: struct `DalekSignature` is never constructed
[INFO] [stdout]    --> libwallet/src/mwixnet/onion/crypto/dalek.rs:121:12
[INFO] [stdout]     |
[INFO] [stdout] 121 | pub struct DalekSignature(Signature);
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_hex` and `verify` are never used
[INFO] [stdout]    --> libwallet/src/mwixnet/onion/crypto/dalek.rs:125:9
[INFO] [stdout]     |
[INFO] [stdout] 123 | impl DalekSignature {
[INFO] [stdout]     | ------------------- associated items in this implementation
[INFO] [stdout] 124 |     /// Convert hex string to DalekSignature.
[INFO] [stdout] 125 |     pub fn from_hex(hex: &str) -> Result<Self, DalekError> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     pub fn verify(&self, pk: &DalekPublicKey, msg: &[u8]) -> Result<(), DalekError> {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ed25519_dalek::Signature, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:391:5
[INFO] [stdout]     |
[INFO] [stdout] 391 |                 DalekSignature::try_from(b).map_err(|err| Error::custom(err.to_string()))
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<ed25519_dalek::Signature>, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:427:6
[INFO] [stdout]     |
[INFO] [stdout] 427 | /                     DalekSignature::try_from(b)
[INFO] [stdout] 428 | |                         .map(Some)
[INFO] [stdout]     | |__________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ed25519_dalek::Signature, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:427:6
[INFO] [stdout]     |
[INFO] [stdout] 427 |                     DalekSignature::try_from(b)
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<ed25519_dalek::Signature>, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:466:6
[INFO] [stdout]     |
[INFO] [stdout] 466 | /                     DalekSignature::try_from(b)
[INFO] [stdout] 467 | |                         .map(Some)
[INFO] [stdout]     | |__________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ed25519_dalek::Signature, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:466:6
[INFO] [stdout]     |
[INFO] [stdout] 466 |                     DalekSignature::try_from(b)
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `grin_wallet_libwallet` (lib) due to 5 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<ed25519_dalek::Signature, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:391:5
[INFO] [stdout]     |
[INFO] [stdout] 391 |                 DalekSignature::try_from(b).map_err(|err| Error::custom(err.to_string()))
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<ed25519_dalek::Signature>, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:427:6
[INFO] [stdout]     |
[INFO] [stdout] 427 | /                     DalekSignature::try_from(b)
[INFO] [stdout] 428 | |                         .map(Some)
[INFO] [stdout]     | |__________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ed25519_dalek::Signature, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:427:6
[INFO] [stdout]     |
[INFO] [stdout] 427 |                     DalekSignature::try_from(b)
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<ed25519_dalek::Signature>, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:466:6
[INFO] [stdout]     |
[INFO] [stdout] 466 | /                     DalekSignature::try_from(b)
[INFO] [stdout] 467 | |                         .map(Some)
[INFO] [stdout]     | |__________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<ed25519_dalek::Signature, Infallible>
[INFO] [stdout]    --> libwallet/src/slate_versions/ser.rs:466:6
[INFO] [stdout]     |
[INFO] [stdout] 466 |                     DalekSignature::try_from(b)
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `grin_wallet_libwallet` (lib test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "7f05092d8d4d81add8d0777bac503ec68ae450f53b3f5521570ac3e4753c980e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f05092d8d4d81add8d0777bac503ec68ae450f53b3f5521570ac3e4753c980e", kill_on_drop: false }`
[INFO] [stdout] 7f05092d8d4d81add8d0777bac503ec68ae450f53b3f5521570ac3e4753c980e
