[INFO] fetching crate ron-reboot 0.1.0-preview11...
[INFO] checking ron-reboot-0.1.0-preview11 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate ron-reboot 0.1.0-preview11 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate ron-reboot 0.1.0-preview11 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 ron-reboot 0.1.0-preview11
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ron-reboot 0.1.0-preview11
[INFO] tweaked toml for crates.io crate ron-reboot 0.1.0-preview11 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate ron-reboot 0.1.0-preview11 already has a lockfile, it will not be regenerated
[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 proc-macro2 v1.0.30
[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] b67b13faf02b49d695b1942caa38c0e7eebe08e6509947a7ab93456939b5e6d5
[INFO] running `Command { std: "docker" "start" "-a" "b67b13faf02b49d695b1942caa38c0e7eebe08e6509947a7ab93456939b5e6d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b67b13faf02b49d695b1942caa38c0e7eebe08e6509947a7ab93456939b5e6d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b67b13faf02b49d695b1942caa38c0e7eebe08e6509947a7ab93456939b5e6d5", kill_on_drop: false }`
[INFO] [stdout] b67b13faf02b49d695b1942caa38c0e7eebe08e6509947a7ab93456939b5e6d5
[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] 244b55718e6803c7e7496d7f31b12c210e9349f33e4de837df2051e758b1d4b1
[INFO] running `Command { std: "docker" "start" "-a" "244b55718e6803c7e7496d7f31b12c210e9349f33e4de837df2051e758b1d4b1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking ron v0.6.6
[INFO] [stderr]     Checking ron-reboot v0.1.0-preview11 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `FromExt` is never used
[INFO] [stdout]    --> src/utf8_parser/pt.rs:485:7
[INFO] [stdout]     |
[INFO] [stdout] 485 | trait FromExt<T> {
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]  --> examples/simple.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct MyStruct {
[INFO] [stdout]   |            -------- fields in this struct
[INFO] [stdout] 7 |     x: bool,
[INFO] [stdout]   |     ^
[INFO] [stdout] 8 |     y: String,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MyStruct` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `FromExt` is never used
[INFO] [stdout]    --> src/utf8_parser/pt.rs:485:7
[INFO] [stdout]     |
[INFO] [stdout] 485 | trait FromExt<T> {
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.54s
[INFO] running `Command { std: "docker" "inspect" "244b55718e6803c7e7496d7f31b12c210e9349f33e4de837df2051e758b1d4b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "244b55718e6803c7e7496d7f31b12c210e9349f33e4de837df2051e758b1d4b1", kill_on_drop: false }`
[INFO] [stdout] 244b55718e6803c7e7496d7f31b12c210e9349f33e4de837df2051e758b1d4b1
[INFO] checking ron-reboot-0.1.0-preview11 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate ron-reboot 0.1.0-preview11 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate ron-reboot 0.1.0-preview11 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 ron-reboot 0.1.0-preview11
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ron-reboot 0.1.0-preview11
[INFO] tweaked toml for crates.io crate ron-reboot 0.1.0-preview11 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate ron-reboot 0.1.0-preview11 already has a lockfile, it will not be regenerated
[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] 4ad9b6f09bf184c439f686e04d1bfd650519795a42eb8d84d4f2e0346e8f0997
[INFO] running `Command { std: "docker" "start" "-a" "4ad9b6f09bf184c439f686e04d1bfd650519795a42eb8d84d4f2e0346e8f0997", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ad9b6f09bf184c439f686e04d1bfd650519795a42eb8d84d4f2e0346e8f0997", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ad9b6f09bf184c439f686e04d1bfd650519795a42eb8d84d4f2e0346e8f0997", kill_on_drop: false }`
[INFO] [stdout] 4ad9b6f09bf184c439f686e04d1bfd650519795a42eb8d84d4f2e0346e8f0997
[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] 107a6867ba4acb8d5f260a5dc6f94037eabd2c1ab1b6506f1f09db5b0a3116a5
[INFO] running `Command { std: "docker" "start" "-a" "107a6867ba4acb8d5f260a5dc6f94037eabd2c1ab1b6506f1f09db5b0a3116a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking ron v0.6.6
[INFO] [stderr]     Checking ron-reboot v0.1.0-preview11 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `FromExt` is never used
[INFO] [stdout]    --> src/utf8_parser/pt.rs:485:7
[INFO] [stdout]     |
[INFO] [stdout] 485 | trait FromExt<T> {
[INFO] [stdout]     |       ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]  --> examples/simple.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct MyStruct {
[INFO] [stdout]   |            -------- fields in this struct
[INFO] [stdout] 7 |     x: bool,
[INFO] [stdout]   |     ^
[INFO] [stdout] 8 |     y: String,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `MyStruct` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/utf8_parser/test_util.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             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 `ron-reboot` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "107a6867ba4acb8d5f260a5dc6f94037eabd2c1ab1b6506f1f09db5b0a3116a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "107a6867ba4acb8d5f260a5dc6f94037eabd2c1ab1b6506f1f09db5b0a3116a5", kill_on_drop: false }`
[INFO] [stdout] 107a6867ba4acb8d5f260a5dc6f94037eabd2c1ab1b6506f1f09db5b0a3116a5