[INFO] fetching crate ibc-core-channel-types 0.48.1...
[INFO] checking ibc-core-channel-types-0.48.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate ibc-core-channel-types 0.48.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate ibc-core-channel-types 0.48.1 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ibc-core-channel-types 0.48.1
[INFO] finished tweaking crates.io crate ibc-core-channel-types 0.48.1
[INFO] tweaked toml for crates.io crate ibc-core-channel-types 0.48.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 116 packages
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding borsh v0.10.3 (latest: v1.4.0)
[INFO] [stderr]       Adding borsh-derive v0.10.3 (latest: v1.4.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding hashbrown v0.13.2 (latest: v0.14.3)
[INFO] [stderr]       Adding ibc-core-client-types v0.48.2 (latest: v0.51.0)
[INFO] [stderr]       Adding ibc-core-commitment-types v0.48.2 (latest: v0.51.0)
[INFO] [stderr]       Adding ibc-core-connection-types v0.48.2 (latest: v0.51.0)
[INFO] [stderr]       Adding ibc-core-host-types v0.48.2 (latest: v0.51.0)
[INFO] [stderr]       Adding ibc-primitives v0.48.2 (latest: v0.51.0)
[INFO] [stderr]       Adding ibc-proto v0.38.0 (latest: v0.42.2)
[INFO] [stderr]       Adding itertools v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding num-derive v0.3.3 (latest: v0.4.2)
[INFO] [stderr]       Adding proc-macro-crate v0.1.5 (latest: v3.1.0)
[INFO] [stderr]       Adding proc-macro-crate v1.3.1 (latest: v3.1.0)
[INFO] [stderr]       Adding proc-macro-crate v2.0.2 (latest: v3.1.0)
[INFO] [stderr]       Adding serde_derive_internals v0.26.0 (latest: v0.29.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding tendermint v0.34.1 (latest: v0.35.0)
[INFO] [stderr]       Adding tendermint-proto v0.34.1 (latest: v0.35.0)
[INFO] [stderr]       Adding time v0.3.30 (latest: v0.3.34)
[INFO] [stderr]       Adding time-macros v0.2.15 (latest: v0.2.17)
[INFO] [stderr]       Adding toml v0.5.11 (latest: v0.8.12)
[INFO] [stderr]       Adding toml_datetime v0.6.3 (latest: v0.6.5)
[INFO] [stderr]       Adding toml_edit v0.19.15 (latest: v0.22.9)
[INFO] [stderr]       Adding toml_edit v0.20.2 (latest: v0.22.9)
[INFO] [stderr]       Adding winnow v0.5.40 (latest: v0.6.5)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tendermint-proto v0.34.1
[INFO] [stderr]   Downloaded ibc-primitives v0.48.2
[INFO] [stderr]   Downloaded informalsystems-pbjson v0.7.0
[INFO] [stderr]   Downloaded subtle-encoding v0.5.1
[INFO] [stderr]   Downloaded ibc-core-commitment-types v0.48.2
[INFO] [stderr]   Downloaded flex-error v0.4.4
[INFO] [stderr]   Downloaded ibc-core-connection-types v0.48.2
[INFO] [stderr]   Downloaded ibc-core-host-types v0.48.2
[INFO] [stderr]   Downloaded ics23 v0.11.1
[INFO] [stderr]   Downloaded tendermint v0.34.1
[INFO] [stderr]   Downloaded ibc-proto v0.38.0
[INFO] [stderr]   Downloaded ibc-core-client-types v0.48.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9a1949acac58a18f05dd13d47b916440775451c7f8d462ea818d318e18727ee3
[INFO] running `Command { std: "docker" "start" "-a" "9a1949acac58a18f05dd13d47b916440775451c7f8d462ea818d318e18727ee3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9a1949acac58a18f05dd13d47b916440775451c7f8d462ea818d318e18727ee3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a1949acac58a18f05dd13d47b916440775451c7f8d462ea818d318e18727ee3", kill_on_drop: false }`
[INFO] [stdout] 9a1949acac58a18f05dd13d47b916440775451c7f8d462ea818d318e18727ee3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d81e33616fef0313879c0a503726f7b4ca1068788f21924d2257bfcb46af6ff0
[INFO] running `Command { std: "docker" "start" "-a" "d81e33616fef0313879c0a503726f7b4ca1068788f21924d2257bfcb46af6ff0", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling eyre v0.6.12
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]    Compiling itertools v0.11.0
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]    Compiling blake3 v1.5.1
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking base64 v0.21.7
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking signature v2.2.0
[INFO] [stderr]    Compiling serde_repr v0.1.18
[INFO] [stderr]    Compiling time-macros v0.2.15
[INFO] [stderr]     Checking ed25519 v2.2.3
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking subtle-encoding v0.5.1
[INFO] [stderr]    Compiling displaydoc v0.2.4
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking blake2 v0.10.6
[INFO] [stderr]     Checking ripemd v0.1.3
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]     Checking flex-error v0.4.4
[INFO] [stderr]    Compiling prost-derive v0.12.3
[INFO] [stderr]     Checking time v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking serde_bytes v0.11.14
[INFO] [stderr]     Checking informalsystems-pbjson v0.7.0
[INFO] [stderr]     Checking prost v0.12.3
[INFO] [stderr]     Checking prost-types v0.12.3
[INFO] [stderr]     Checking ics23 v0.11.1
[INFO] [stderr]     Checking tendermint-proto v0.34.1
[INFO] [stderr]     Checking tendermint v0.34.1
[INFO] [stderr]     Checking ibc-proto v0.38.0
[INFO] [stderr]     Checking ibc-primitives v0.48.2
[INFO] [stderr]     Checking ibc-core-commitment-types v0.48.2
[INFO] [stderr]     Checking ibc-core-host-types v0.48.2
[INFO] [stderr]     Checking ibc-core-client-types v0.48.2
[INFO] [stderr]     Checking ibc-core-connection-types v0.48.2
[INFO] [stderr]     Checking ibc-core-channel-types v0.48.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.80s
[INFO] running `Command { std: "docker" "inspect" "d81e33616fef0313879c0a503726f7b4ca1068788f21924d2257bfcb46af6ff0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d81e33616fef0313879c0a503726f7b4ca1068788f21924d2257bfcb46af6ff0", kill_on_drop: false }`
[INFO] [stdout] d81e33616fef0313879c0a503726f7b4ca1068788f21924d2257bfcb46af6ff0
[INFO] checking ibc-core-channel-types-0.48.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate ibc-core-channel-types 0.48.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate ibc-core-channel-types 0.48.1 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ibc-core-channel-types 0.48.1
[INFO] finished tweaking crates.io crate ibc-core-channel-types 0.48.1
[INFO] tweaked toml for crates.io crate ibc-core-channel-types 0.48.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7865cfe6572d60295d4095d17049d35679426406655a35ec4e671d589be30add
[INFO] running `Command { std: "docker" "start" "-a" "7865cfe6572d60295d4095d17049d35679426406655a35ec4e671d589be30add", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7865cfe6572d60295d4095d17049d35679426406655a35ec4e671d589be30add", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7865cfe6572d60295d4095d17049d35679426406655a35ec4e671d589be30add", kill_on_drop: false }`
[INFO] [stdout] 7865cfe6572d60295d4095d17049d35679426406655a35ec4e671d589be30add
[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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1423decf22e42c43ed50dcf9c1367286f274b3f8f4f15fc55e52b757416adf7
[INFO] running `Command { std: "docker" "start" "-a" "f1423decf22e42c43ed50dcf9c1367286f274b3f8f4f15fc55e52b757416adf7", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling eyre v0.6.12
[INFO] [stderr]    Compiling time-core v0.1.2
[INFO] [stderr]     Checking indenter v0.3.3
[INFO] [stderr]    Compiling itertools v0.11.0
[INFO] [stderr]    Compiling blake3 v1.5.1
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking futures-task v0.3.30
[INFO] [stderr]     Checking constant_time_eq v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling zeroize_derive v1.4.2
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking base64 v0.21.7
[INFO] [stderr]     Checking signature v2.2.0
[INFO] [stderr]    Compiling time-macros v0.2.15
[INFO] [stderr]    Compiling serde_repr v0.1.18
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking ed25519 v2.2.3
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]     Checking blake2 v0.10.6
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking ripemd v0.1.3
[INFO] [stderr]    Compiling displaydoc v0.2.4
[INFO] [stderr]     Checking flex-error v0.4.4
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]     Checking subtle-encoding v0.5.1
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/error.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             Err($err)?;
[INFO] [stdout]    |             ^^^^^^^^^ cannot infer type
[INFO] [stdout]    |
[INFO] [stdout]   ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/base64.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         ensure!(self.decoded_len(src)? <= dst.len(), LengthInvalid);
[INFO] [stdout]    |         ----------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `ensure` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/error.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             Err($err)?;
[INFO] [stdout]    |             ^^^^^^^^^ cannot infer type
[INFO] [stdout]    |
[INFO] [stdout]   ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/bech32/base32.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         ensure!(v >> src_base == 0, Error::EncodingInvalid);
[INFO] [stdout]    |         --------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `ensure` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/error.rs:54:13
[INFO] [stdout]     |
[INFO] [stdout] 54  |             Err($err)?;
[INFO] [stdout]     |             ^^^^^^^^^ cannot infer type
[INFO] [stdout]     |
[INFO] [stdout]    ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/hex.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 |         ensure!(dst_length <= dst.len(), LengthInvalid);
[INFO] [stdout]     |         ----------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `ensure` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/error.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             Err($err)?;
[INFO] [stdout]    |             ^^^^^^^^^ cannot infer type
[INFO] [stdout]    |
[INFO] [stdout]   ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/identity.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         ensure!(self.encoded_len(src) == dst.len(), LengthInvalid);
[INFO] [stdout]    |         ---------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `ensure` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/error.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |             Err($err)?;
[INFO] [stdout]    |             ^^^^^^^^^ cannot infer type
[INFO] [stdout]    |
[INFO] [stdout]   ::: /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/subtle-encoding-0.5.1/src/identity.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         ensure!(self.decoded_len(src)? == dst.len(), LengthInvalid);
[INFO] [stdout]    |         ----------------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the macro `ensure` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `subtle-encoding` (lib) due to 6 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f1423decf22e42c43ed50dcf9c1367286f274b3f8f4f15fc55e52b757416adf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1423decf22e42c43ed50dcf9c1367286f274b3f8f4f15fc55e52b757416adf7", kill_on_drop: false }`
[INFO] [stdout] f1423decf22e42c43ed50dcf9c1367286f274b3f8f4f15fc55e52b757416adf7