[INFO] fetching crate dedup_signature 0.2.1...
[INFO] checking dedup_signature-0.2.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate dedup_signature 0.2.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate dedup_signature 0.2.1 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 dedup_signature 0.2.1
[INFO] finished tweaking crates.io crate dedup_signature 0.2.1
[INFO] tweaked toml for crates.io crate dedup_signature 0.2.1 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 17 packages
[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 wasi v0.10.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding yaml-rust v0.3.5 (latest: v0.4.5)
[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 yaml-rust v0.3.5
[INFO] [stderr]   Downloaded rust-crypto v0.2.36
[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] 1239fef40ca9354d2b582bb84d32c138210ae812ba8c52b6bd0c350697c0605c
[INFO] running `Command { std: "docker" "start" "-a" "1239fef40ca9354d2b582bb84d32c138210ae812ba8c52b6bd0c350697c0605c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1239fef40ca9354d2b582bb84d32c138210ae812ba8c52b6bd0c350697c0605c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1239fef40ca9354d2b582bb84d32c138210ae812ba8c52b6bd0c350697c0605c", kill_on_drop: false }`
[INFO] [stdout] 1239fef40ca9354d2b582bb84d32c138210ae812ba8c52b6bd0c350697c0605c
[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] 86a31e6bcb18b8881411032f80ab482f8df529bc1df68bc98e2d98c2338778b7
[INFO] running `Command { std: "docker" "start" "-a" "86a31e6bcb18b8881411032f80ab482f8df529bc1df68bc98e2d98c2338778b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking dedup_signature v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/hash.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     ((x << k) | (x >> (32 - k)))
[INFO] [stdout]    |     ^                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 18 -     ((x << k) | (x >> (32 - k)))
[INFO] [stdout] 18 +     (x << k) | (x >> (32 - k))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/hash.rs:70:24
[INFO] [stdout]    |
[INFO] [stdout] 70 |     a = a.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout]    |                        ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 70 -     a = a.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout] 70 +     a = a.wrapping_add((length as u32) << 2).wrapping_add(initval);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/hash.rs:71:24
[INFO] [stdout]    |
[INFO] [stdout] 71 |     b = b.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout]    |                        ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 71 -     b = b.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout] 71 +     b = b.wrapping_add((length as u32) << 2).wrapping_add(initval);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/hash.rs:72:24
[INFO] [stdout]    |
[INFO] [stdout] 72 |     c = c.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout]    |                        ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 72 -     c = c.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout] 72 +     c = c.wrapping_add((length as u32) << 2).wrapping_add(initval);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/hash.rs:117:24
[INFO] [stdout]     |
[INFO] [stdout] 117 |     a = a.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout]     |                        ^                    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 117 -     a = a.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout] 117 +     a = a.wrapping_add((length as u32) << 2).wrapping_add(
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/hash.rs:120:24
[INFO] [stdout]     |
[INFO] [stdout] 120 |     b = b.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout]     |                        ^                    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 120 -     b = b.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout] 120 +     b = b.wrapping_add((length as u32) << 2).wrapping_add(
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/hash.rs:123:24
[INFO] [stdout]     |
[INFO] [stdout] 123 |     c = c.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout]     |                        ^                    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 123 -     c = c.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout] 123 +     c = c.wrapping_add((length as u32) << 2).wrapping_add(
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/hash.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     ((x << k) | (x >> (32 - k)))
[INFO] [stdout]    |     ^                          ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 18 -     ((x << k) | (x >> (32 - k)))
[INFO] [stdout] 18 +     (x << k) | (x >> (32 - k))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/hash.rs:70:24
[INFO] [stdout]    |
[INFO] [stdout] 70 |     a = a.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout]    |                        ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 70 -     a = a.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout] 70 +     a = a.wrapping_add((length as u32) << 2).wrapping_add(initval);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/hash.rs:71:24
[INFO] [stdout]    |
[INFO] [stdout] 71 |     b = b.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout]    |                        ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 71 -     b = b.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout] 71 +     b = b.wrapping_add((length as u32) << 2).wrapping_add(initval);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]   --> src/hash.rs:72:24
[INFO] [stdout]    |
[INFO] [stdout] 72 |     c = c.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout]    |                        ^                    ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 72 -     c = c.wrapping_add(((length as u32) << 2)).wrapping_add(initval);
[INFO] [stdout] 72 +     c = c.wrapping_add((length as u32) << 2).wrapping_add(initval);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/hash.rs:117:24
[INFO] [stdout]     |
[INFO] [stdout] 117 |     a = a.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout]     |                        ^                    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 117 -     a = a.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout] 117 +     a = a.wrapping_add((length as u32) << 2).wrapping_add(
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/hash.rs:120:24
[INFO] [stdout]     |
[INFO] [stdout] 120 |     b = b.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout]     |                        ^                    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 120 -     b = b.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout] 120 +     b = b.wrapping_add((length as u32) << 2).wrapping_add(
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around method argument
[INFO] [stdout]    --> src/hash.rs:123:24
[INFO] [stdout]     |
[INFO] [stdout] 123 |     c = c.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout]     |                        ^                    ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 123 -     c = c.wrapping_add(((length as u32) << 2)).wrapping_add(
[INFO] [stdout] 123 +     c = c.wrapping_add((length as u32) << 2).wrapping_add(
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.15s
[INFO] running `Command { std: "docker" "inspect" "86a31e6bcb18b8881411032f80ab482f8df529bc1df68bc98e2d98c2338778b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86a31e6bcb18b8881411032f80ab482f8df529bc1df68bc98e2d98c2338778b7", kill_on_drop: false }`
[INFO] [stdout] 86a31e6bcb18b8881411032f80ab482f8df529bc1df68bc98e2d98c2338778b7
[INFO] checking dedup_signature-0.2.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate dedup_signature 0.2.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate dedup_signature 0.2.1 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 dedup_signature 0.2.1
[INFO] finished tweaking crates.io crate dedup_signature 0.2.1
[INFO] tweaked toml for crates.io crate dedup_signature 0.2.1 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] 0c23bb1209e207c25e0ffed62f896cba05e4f4c2097caced1fb45823872355d7
[INFO] running `Command { std: "docker" "start" "-a" "0c23bb1209e207c25e0ffed62f896cba05e4f4c2097caced1fb45823872355d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c23bb1209e207c25e0ffed62f896cba05e4f4c2097caced1fb45823872355d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c23bb1209e207c25e0ffed62f896cba05e4f4c2097caced1fb45823872355d7", kill_on_drop: false }`
[INFO] [stdout] 0c23bb1209e207c25e0ffed62f896cba05e4f4c2097caced1fb45823872355d7
[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] 194a984b99a85820ad95f8ed7bbf506d7901d33989065d35b1ce26b59dd7b58a
[INFO] running `Command { std: "docker" "start" "-a" "194a984b99a85820ad95f8ed7bbf506d7901d33989065d35b1ce26b59dd7b58a", kill_on_drop: false }`
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[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] running `Command { std: "docker" "inspect" "194a984b99a85820ad95f8ed7bbf506d7901d33989065d35b1ce26b59dd7b58a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "194a984b99a85820ad95f8ed7bbf506d7901d33989065d35b1ce26b59dd7b58a", kill_on_drop: false }`
[INFO] [stdout] 194a984b99a85820ad95f8ed7bbf506d7901d33989065d35b1ce26b59dd7b58a