[INFO] fetching crate bl602-sdk 0.0.6...
[INFO] checking bl602-sdk-0.0.6 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate bl602-sdk 0.0.6 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate bl602-sdk 0.0.6 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 bl602-sdk 0.0.6
[INFO] finished tweaking crates.io crate bl602-sdk 0.0.6
[INFO] tweaked toml for crates.io crate bl602-sdk 0.0.6 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 23 packages
[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 syn v1.0.109 (latest: v2.0.58)
[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 bl602-macros v0.0.2
[INFO] [stderr]   Downloaded heapless v0.7.17
[INFO] [stderr]   Downloaded atomic-polyfill v1.0.3
[INFO] [stderr]   Downloaded cstr_core v0.2.6
[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] 418e2fb0788eb881b5c23aecad0fb6634856fcba501c5203de819b13335995fb
[INFO] running `Command { std: "docker" "start" "-a" "418e2fb0788eb881b5c23aecad0fb6634856fcba501c5203de819b13335995fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "418e2fb0788eb881b5c23aecad0fb6634856fcba501c5203de819b13335995fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "418e2fb0788eb881b5c23aecad0fb6634856fcba501c5203de819b13335995fb", kill_on_drop: false }`
[INFO] [stdout] 418e2fb0788eb881b5c23aecad0fb6634856fcba501c5203de819b13335995fb
[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] 0ae330f2fd76e1c25fbb228d95fc9abb6d83ebab4e7b929d9a1bb0ae5c7ab5a3
[INFO] running `Command { std: "docker" "start" "-a" "0ae330f2fd76e1c25fbb228d95fc9abb6d83ebab4e7b929d9a1bb0ae5c7ab5a3", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling cty v0.2.2
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling rustc-serialize v0.3.25
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]    Compiling cstr_core v0.2.6
[INFO] [stderr]    Compiling bl602-macros v0.0.2
[INFO] [stderr]     Checking bl602-sdk v0.0.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.18s
[INFO] running `Command { std: "docker" "inspect" "0ae330f2fd76e1c25fbb228d95fc9abb6d83ebab4e7b929d9a1bb0ae5c7ab5a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ae330f2fd76e1c25fbb228d95fc9abb6d83ebab4e7b929d9a1bb0ae5c7ab5a3", kill_on_drop: false }`
[INFO] [stdout] 0ae330f2fd76e1c25fbb228d95fc9abb6d83ebab4e7b929d9a1bb0ae5c7ab5a3
[INFO] checking bl602-sdk-0.0.6 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate bl602-sdk 0.0.6 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate bl602-sdk 0.0.6 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 bl602-sdk 0.0.6
[INFO] finished tweaking crates.io crate bl602-sdk 0.0.6
[INFO] tweaked toml for crates.io crate bl602-sdk 0.0.6 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] 0370a3855a44b0907d0b84b425c826eb12b0b880af2fa4e22f17dc9b18a06734
[INFO] running `Command { std: "docker" "start" "-a" "0370a3855a44b0907d0b84b425c826eb12b0b880af2fa4e22f17dc9b18a06734", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0370a3855a44b0907d0b84b425c826eb12b0b880af2fa4e22f17dc9b18a06734", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0370a3855a44b0907d0b84b425c826eb12b0b880af2fa4e22f17dc9b18a06734", kill_on_drop: false }`
[INFO] [stdout] 0370a3855a44b0907d0b84b425c826eb12b0b880af2fa4e22f17dc9b18a06734
[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] b7556b95e2de09eb95be2f066a2649d8c996ffce882b673c51c96a92310e7633
[INFO] running `Command { std: "docker" "start" "-a" "b7556b95e2de09eb95be2f066a2649d8c996ffce882b673c51c96a92310e7633", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling cty v0.2.2
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling rustc-serialize v0.3.25
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling cstr_core v0.2.6
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rustc-serialize-0.3.25/src/json.rs:1387:20
[INFO] [stdout]      |
[INFO] [stdout] 1387 |             _ => { panic!(); }
[INFO] [stdout]      |                    ^^^^^^^^ cannot infer type
[INFO] [stdout]      |
[INFO] [stdout]      = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-serialize` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b7556b95e2de09eb95be2f066a2649d8c996ffce882b673c51c96a92310e7633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7556b95e2de09eb95be2f066a2649d8c996ffce882b673c51c96a92310e7633", kill_on_drop: false }`
[INFO] [stdout] b7556b95e2de09eb95be2f066a2649d8c996ffce882b673c51c96a92310e7633