[INFO] fetching crate double-ratchet-signal 0.1.3...
[INFO] checking double-ratchet-signal-0.1.3 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate double-ratchet-signal 0.1.3 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate double-ratchet-signal 0.1.3
[INFO] finished tweaking crates.io crate double-ratchet-signal 0.1.3
[INFO] tweaked toml for crates.io crate double-ratchet-signal 0.1.3 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate double-ratchet-signal 0.1.3 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 51 packages to latest compatible versions
[INFO] [stderr]       Adding aes v0.6.0 (available: v0.8.4)
[INFO] [stderr]       Adding block-modes v0.4.0 (available: v0.9.1)
[INFO] [stderr]       Adding generic-array v0.12.4 (available: v1.3.5)
[INFO] [stderr]       Adding generic-array v0.14.7 (available: v0.14.9)
[INFO] [stderr]       Adding hkdf v0.7.1 (available: v0.12.4)
[INFO] [stderr]       Adding hmac v0.7.1 (available: v0.12.1)
[INFO] [stderr]       Adding rand_core v0.4.2 (available: v0.9.3)
[INFO] [stderr]       Adding rand_os v0.1.3 (available: v0.2.2)
[INFO] [stderr]       Adding sha2 v0.8.2 (available: v0.10.9)
[INFO] [stderr]       Adding x25519-dalek v0.5.2 (available: v2.0.1)
[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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 6f578a7566ebe2044d95d84441e42ecda307d216de39a12b478e3480698ca792
[INFO] running `Command { std: "docker" "start" "-a" "6f578a7566ebe2044d95d84441e42ecda307d216de39a12b478e3480698ca792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f578a7566ebe2044d95d84441e42ecda307d216de39a12b478e3480698ca792", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f578a7566ebe2044d95d84441e42ecda307d216de39a12b478e3480698ca792", kill_on_drop: false }`
[INFO] [stdout] 6f578a7566ebe2044d95d84441e42ecda307d216de39a12b478e3480698ca792
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 }`
[INFO] [stdout] 6b216d94de8f9e714c5ce6c77b110a1b2c95e47a5753f5535fd06213e83f3a2f
[INFO] running `Command { std: "docker" "start" "-a" "6b216d94de8f9e714c5ce6c77b110a1b2c95e47a5753f5535fd06213e83f3a2f", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling subtle v2.6.1
[INFO] [stderr]    Compiling cc v1.2.45
[INFO] [stderr]    Compiling typenum v1.19.0
[INFO] [stderr]     Checking generic-array v0.14.7
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking byte-tools v0.3.1
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking opaque-debug v0.2.3
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking double-ratchet v0.1.0
[INFO] [stderr]     Checking sha2 v0.8.2
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]     Checking hkdf v0.7.1
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]     Checking block-padding v0.3.3
[INFO] [stderr]     Checking crypto-common v0.1.7
[INFO] [stderr]     Checking cipher v0.2.5
[INFO] [stderr]     Checking block-cipher v0.7.1
[INFO] [stderr]     Checking aes-soft v0.6.4
[INFO] [stderr]     Checking block-modes v0.4.0
[INFO] [stderr]     Checking inout v0.1.4
[INFO] [stderr]     Checking aes v0.6.0
[INFO] [stderr]     Checking cipher v0.4.4
[INFO] [stderr]     Checking aes v0.8.4
[INFO] [stderr]     Checking cbc v0.1.2
[INFO] [stderr]    Compiling clear_on_drop v0.2.5
[INFO] [stderr]     Checking double-ratchet-signal-cbc-aes256-pkcs7-compact v0.1.1
[INFO] [stderr]    Compiling curve25519-dalek v1.2.6
[INFO] [stderr]     Checking x25519-dalek v0.5.2
[INFO] [stderr]     Checking double-ratchet-signal v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:182:61
[INFO] [stdout]     |
[INFO] [stdout] 182 |       fn try_from(pk: PublicKey) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  _____________________________________________________________^
[INFO] [stdout] 183 | |         Ok(*pk.0.as_bytes())
[INFO] [stdout] 184 | |     }
[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<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:183:9
[INFO] [stdout]     |
[INFO] [stdout] 183 |         Ok(*pk.0.as_bytes())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:239:59
[INFO] [stdout]     |
[INFO] [stdout] 239 |       fn try_from(kp: KeyPair) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  ___________________________________________________________^
[INFO] [stdout] 240 | |         Ok(kp.private.to_bytes())
[INFO] [stdout] 241 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:240:9
[INFO] [stdout]     |
[INFO] [stdout] 240 |         Ok(kp.private.to_bytes())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:274:64
[INFO] [stdout]     |
[INFO] [stdout] 274 |       fn try_from(sk: SymmetricKey) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________^
[INFO] [stdout] 275 | |         sk.0.as_slice()
[INFO] [stdout] 276 | |             .clone()
[INFO] [stdout] 277 | |             .try_into()
[INFO] [stdout] 278 | |             .map_err(|_| unreachable!())
[INFO] [stdout] 279 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:275:9
[INFO] [stdout]     |
[INFO] [stdout] 275 | /         sk.0.as_slice()
[INFO] [stdout] 276 | |             .clone()
[INFO] [stdout] 277 | |             .try_into()
[INFO] [stdout] 278 | |             .map_err(|_| unreachable!())
[INFO] [stdout]     | |________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/signal.rs:275:24
[INFO] [stdout]     |
[INFO] [stdout] 275 |           sk.0.as_slice()
[INFO] [stdout]     |  ________________________^
[INFO] [stdout] 276 | |             .clone()
[INFO] [stdout]     | |____________________^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[u8]` does not implement `Clone`, so calling `clone` on `&[u8]` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `double-ratchet-signal` (lib) due to 6 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:182:61
[INFO] [stdout]     |
[INFO] [stdout] 182 |       fn try_from(pk: PublicKey) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  _____________________________________________________________^
[INFO] [stdout] 183 | |         Ok(*pk.0.as_bytes())
[INFO] [stdout] 184 | |     }
[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<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:183:9
[INFO] [stdout]     |
[INFO] [stdout] 183 |         Ok(*pk.0.as_bytes())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `double-ratchet-signal` (lib test) due to 6 previous errors; 1 warning emitted
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:239:59
[INFO] [stdout]     |
[INFO] [stdout] 239 |       fn try_from(kp: KeyPair) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  ___________________________________________________________^
[INFO] [stdout] 240 | |         Ok(kp.private.to_bytes())
[INFO] [stdout] 241 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:240:9
[INFO] [stdout]     |
[INFO] [stdout] 240 |         Ok(kp.private.to_bytes())
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:274:64
[INFO] [stdout]     |
[INFO] [stdout] 274 |       fn try_from(sk: SymmetricKey) -> Result<Self, Self::Error> {
[INFO] [stdout]     |  ________________________________________________________________^
[INFO] [stdout] 275 | |         sk.0.as_slice()
[INFO] [stdout] 276 | |             .clone()
[INFO] [stdout] 277 | |             .try_into()
[INFO] [stdout] 278 | |             .map_err(|_| unreachable!())
[INFO] [stdout] 279 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<[u8; 32], Infallible>
[INFO] [stdout]    --> src/signal.rs:275:9
[INFO] [stdout]     |
[INFO] [stdout] 275 | /         sk.0.as_slice()
[INFO] [stdout] 276 | |             .clone()
[INFO] [stdout] 277 | |             .try_into()
[INFO] [stdout] 278 | |             .map_err(|_| unreachable!())
[INFO] [stdout]     | |________________________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/signal.rs:275:24
[INFO] [stdout]     |
[INFO] [stdout] 275 |           sk.0.as_slice()
[INFO] [stdout]     |  ________________________^
[INFO] [stdout] 276 | |             .clone()
[INFO] [stdout]     | |____________________^ help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `[u8]` does not implement `Clone`, so calling `clone` on `&[u8]` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6b216d94de8f9e714c5ce6c77b110a1b2c95e47a5753f5535fd06213e83f3a2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b216d94de8f9e714c5ce6c77b110a1b2c95e47a5753f5535fd06213e83f3a2f", kill_on_drop: false }`
[INFO] [stdout] 6b216d94de8f9e714c5ce6c77b110a1b2c95e47a5753f5535fd06213e83f3a2f