[INFO] fetching crate google-cloud-iot-jwt 0.1.1...
[INFO] checking google-cloud-iot-jwt-0.1.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate google-cloud-iot-jwt 0.1.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate google-cloud-iot-jwt 0.1.1 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 google-cloud-iot-jwt 0.1.1
[INFO] finished tweaking crates.io crate google-cloud-iot-jwt 0.1.1
[INFO] tweaked toml for crates.io crate google-cloud-iot-jwt 0.1.1 written to /workspace/builds/worker-3-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 51 packages
[INFO] [stderr]       Adding base16ct v0.1.1 (latest: v0.2.0)
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding const-oid v0.7.1 (latest: v0.9.6)
[INFO] [stderr]       Adding crypto-bigint v0.3.2 (latest: v0.5.5)
[INFO] [stderr]       Adding der v0.5.1 (latest: v0.7.9)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding ecdsa v0.13.4 (latest: v0.16.9)
[INFO] [stderr]       Adding elliptic-curve v0.11.12 (latest: v0.13.8)
[INFO] [stderr]       Adding ff v0.11.1 (latest: v0.13.0)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.0.0)
[INFO] [stderr]       Adding group v0.11.0 (latest: v0.13.0)
[INFO] [stderr]       Adding hash32 v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding heapless v0.7.17 (latest: v0.8.0)
[INFO] [stderr]       Adding hex-literal v0.3.4 (latest: v0.4.1)
[INFO] [stderr]       Adding hmac v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding p256 v0.10.1 (latest: v0.13.2)
[INFO] [stderr]       Adding pem-rfc7468 v0.3.1 (latest: v0.7.0)
[INFO] [stderr]       Adding rfc6979 v0.1.0 (latest: v0.4.0)
[INFO] [stderr]       Adding sec1 v0.2.1 (latest: v0.7.3)
[INFO] [stderr]       Adding sha2 v0.9.9 (latest: v0.10.8)
[INFO] [stderr]       Adding signature v1.4.0 (latest: v2.2.0)
[INFO] [stderr]       Adding subtle v2.4.1 (latest: v2.5.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding ufmt v0.1.2 (latest: v0.2.0)
[INFO] [stderr]       Adding ufmt-macros v0.2.0 (latest: v0.3.0)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ufmt-write v0.1.0
[INFO] [stderr]   Downloaded group v0.11.0
[INFO] [stderr]   Downloaded ufmt-macros v0.2.0
[INFO] [stderr]   Downloaded ufmt v0.1.2
[INFO] [stderr]   Downloaded sec1 v0.2.1
[INFO] [stderr]   Downloaded p256 v0.10.1
[INFO] [stderr]   Downloaded ff v0.11.1
[INFO] [stderr]   Downloaded elliptic-curve v0.11.12
[INFO] [stderr]   Downloaded rfc6979 v0.1.0
[INFO] [stderr]   Downloaded signature v1.4.0
[INFO] [stderr]   Downloaded ecdsa v0.13.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 6687bffd9f28be22bba6b48fc981625adb1be5bab12f552b0b74221a0ce022b7
[INFO] running `Command { std: "docker" "start" "-a" "6687bffd9f28be22bba6b48fc981625adb1be5bab12f552b0b74221a0ce022b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6687bffd9f28be22bba6b48fc981625adb1be5bab12f552b0b74221a0ce022b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6687bffd9f28be22bba6b48fc981625adb1be5bab12f552b0b74221a0ce022b7", kill_on_drop: false }`
[INFO] [stdout] 6687bffd9f28be22bba6b48fc981625adb1be5bab12f552b0b74221a0ce022b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 2fbc65acfab1af5f536af544fc88fa067a4bb96b0c8e7c76a0ec53f5f3f3c2f4
[INFO] running `Command { std: "docker" "start" "-a" "2fbc65acfab1af5f536af544fc88fa067a4bb96b0c8e7c76a0ec53f5f3f3c2f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]     Checking subtle v2.4.1
[INFO] [stderr]     Checking zeroize v1.7.0
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]     Checking const-oid v0.7.1
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]     Checking ff v0.11.1
[INFO] [stderr]     Checking der v0.5.1
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking base16ct v0.1.1
[INFO] [stderr]     Checking group v0.11.0
[INFO] [stderr]     Checking opaque-debug v0.3.1
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking pem-rfc7468 v0.3.1
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]    Compiling hex-literal v0.3.4
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking crypto-bigint v0.3.2
[INFO] [stderr]     Checking crypto-mac v0.11.1
[INFO] [stderr]     Checking signature v1.4.0
[INFO] [stderr]     Checking hmac v0.11.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking sec1 v0.2.1
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]     Checking elliptic-curve v0.11.12
[INFO] [stderr]     Checking rfc6979 v0.1.0
[INFO] [stderr]     Checking ecdsa v0.13.4
[INFO] [stderr]     Checking p256 v0.10.1
[INFO] [stderr]    Compiling ufmt-macros v0.2.0
[INFO] [stderr]     Checking ufmt v0.1.2
[INFO] [stderr]     Checking google-cloud-iot-jwt v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/jwt_es256.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::result::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> src/jwt_es256.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::result::Result;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/core/src/prelude/mod.rs:57:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.75s
[INFO] running `Command { std: "docker" "inspect" "2fbc65acfab1af5f536af544fc88fa067a4bb96b0c8e7c76a0ec53f5f3f3c2f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fbc65acfab1af5f536af544fc88fa067a4bb96b0c8e7c76a0ec53f5f3f3c2f4", kill_on_drop: false }`
[INFO] [stdout] 2fbc65acfab1af5f536af544fc88fa067a4bb96b0c8e7c76a0ec53f5f3f3c2f4