[INFO] fetching crate iron-drain 0.1.2...
[INFO] checking iron-drain-0.1.2 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate iron-drain 0.1.2 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate iron-drain 0.1.2 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 iron-drain 0.1.2
[INFO] finished tweaking crates.io crate iron-drain 0.1.2
[INFO] tweaked toml for crates.io crate iron-drain 0.1.2 written to /workspace/builds/worker-7-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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 48 packages
[INFO] [stderr]       Adding conduit-mime-types v0.7.3 (latest: v0.8.0)
[INFO] [stderr]       Adding cookie v0.2.5 (latest: v0.18.1)
[INFO] [stderr]       Adding hpack v0.2.0 (latest: v0.3.0)
[INFO] [stderr]       Adding hyper v0.8.1 (latest: v1.2.0)
[INFO] [stderr]       Adding idna v0.1.5 (latest: v0.5.0)
[INFO] [stderr]       Adding iron v0.3.1 (latest: v0.6.1)
[INFO] [stderr]       Adding language-tags v0.2.2 (latest: v0.3.2)
[INFO] [stderr]       Adding lazy_static v0.1.16 (latest: v1.4.0)
[INFO] [stderr]       Adding log v0.3.9 (latest: v0.4.21)
[INFO] [stderr]       Adding mime v0.2.6 (latest: v0.3.17)
[INFO] [stderr]       Adding num_cpus v0.2.13 (latest: v1.16.0)
[INFO] [stderr]       Adding percent-encoding v1.0.1 (latest: v2.3.1)
[INFO] [stderr]       Adding rand v0.3.23 (latest: v0.8.5)
[INFO] [stderr]       Adding rand v0.4.6 (latest: v0.8.5)
[INFO] [stderr]       Adding rand_core v0.3.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_core v0.4.2 (latest: v0.6.4)
[INFO] [stderr]       Adding rdrand v0.4.0 (latest: v0.8.3)
[INFO] [stderr]       Adding time v0.1.45 (latest: v0.3.34)
[INFO] [stderr]       Adding traitobject v0.0.1 (latest: v0.1.0)
[INFO] [stderr]       Adding unicase v1.4.2 (latest: v2.7.0)
[INFO] [stderr]       Adding unicode-bidi v0.2.6 (latest: v0.3.15)
[INFO] [stderr]       Adding url v0.5.10 (latest: v2.5.0)
[INFO] [stderr]       Adding url v1.7.2 (latest: v2.5.0)
[INFO] [stderr]       Adding uuid v0.2.3 (latest: v1.8.0)
[INFO] [stderr]       Adding version_check v0.1.5 (latest: v0.9.4)
[INFO] [stderr]       Adding wasi v0.10.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 2a32ce1854dabfbaf1cf5728bcd6a54d46576eafb8a22d77b8b18df3e6d9683c
[INFO] running `Command { std: "docker" "start" "-a" "2a32ce1854dabfbaf1cf5728bcd6a54d46576eafb8a22d77b8b18df3e6d9683c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a32ce1854dabfbaf1cf5728bcd6a54d46576eafb8a22d77b8b18df3e6d9683c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a32ce1854dabfbaf1cf5728bcd6a54d46576eafb8a22d77b8b18df3e6d9683c", kill_on_drop: false }`
[INFO] [stdout] 2a32ce1854dabfbaf1cf5728bcd6a54d46576eafb8a22d77b8b18df3e6d9683c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 241fc48df89062a78f507150352e9d16b6e32cf30ffc87379f7518830d536869
[INFO] running `Command { std: "docker" "start" "-a" "241fc48df89062a78f507150352e9d16b6e32cf30ffc87379f7518830d536869", kill_on_drop: false }`
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking traitobject v0.0.1
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking unicode-bidi v0.2.6
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking uuid v0.2.3
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking error v0.1.9
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking hpack v0.2.0
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking plugin v0.2.6
[INFO] [stderr]     Checking solicit v0.4.4
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking cookie v0.2.5
[INFO] [stderr]     Checking url v0.5.10
[INFO] [stderr]     Checking conduit-mime-types v0.7.3
[INFO] [stderr]     Checking hyper v0.8.1
[INFO] [stderr]     Checking iron v0.3.1
[INFO] [stderr]     Checking iron-drain v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.86s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: traitobject v0.1.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "241fc48df89062a78f507150352e9d16b6e32cf30ffc87379f7518830d536869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "241fc48df89062a78f507150352e9d16b6e32cf30ffc87379f7518830d536869", kill_on_drop: false }`
[INFO] [stdout] 241fc48df89062a78f507150352e9d16b6e32cf30ffc87379f7518830d536869
[INFO] checking iron-drain-0.1.2 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate iron-drain 0.1.2 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate iron-drain 0.1.2 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 iron-drain 0.1.2
[INFO] finished tweaking crates.io crate iron-drain 0.1.2
[INFO] tweaked toml for crates.io crate iron-drain 0.1.2 written to /workspace/builds/worker-7-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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 2d9d67fa7e34b3f042eb054b0ed12c3501710703480b5c2d45dcb222d48dac0a
[INFO] running `Command { std: "docker" "start" "-a" "2d9d67fa7e34b3f042eb054b0ed12c3501710703480b5c2d45dcb222d48dac0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2d9d67fa7e34b3f042eb054b0ed12c3501710703480b5c2d45dcb222d48dac0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d9d67fa7e34b3f042eb054b0ed12c3501710703480b5c2d45dcb222d48dac0a", kill_on_drop: false }`
[INFO] [stdout] 2d9d67fa7e34b3f042eb054b0ed12c3501710703480b5c2d45dcb222d48dac0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] d5385ea20c9ea227ad4c5f2c49bd4424822b532be524f5976e5cb7c647c1003f
[INFO] running `Command { std: "docker" "start" "-a" "d5385ea20c9ea227ad4c5f2c49bd4424822b532be524f5976e5cb7c647c1003f", kill_on_drop: false }`
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking traitobject v0.0.1
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking lazy_static v0.1.16
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking num_cpus v0.2.13
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking unicode-bidi v0.2.6
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking error v0.1.9
[INFO] [stderr]     Checking uuid v0.2.3
[INFO] [stderr]     Checking typemap v0.3.3
[INFO] [stderr]     Checking hpack v0.2.0
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking plugin v0.2.6
[INFO] [stderr]     Checking solicit v0.4.4
[INFO] [stderr]     Checking url v1.7.2
[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] [stderr]     Checking cookie v0.2.5
[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] running `Command { std: "docker" "inspect" "d5385ea20c9ea227ad4c5f2c49bd4424822b532be524f5976e5cb7c647c1003f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5385ea20c9ea227ad4c5f2c49bd4424822b532be524f5976e5cb7c647c1003f", kill_on_drop: false }`
[INFO] [stdout] d5385ea20c9ea227ad4c5f2c49bd4424822b532be524f5976e5cb7c647c1003f