[INFO] cloning repository https://github.com/apiel/v8io
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/apiel/v8io" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapiel%2Fv8io", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapiel%2Fv8io'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6c16ea3ef0809f12b68a65ba64fc6c5b36a8f129
[INFO] checking apiel/v8io against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapiel%2Fv8io" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/apiel/v8io 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 git repo https://github.com/apiel/v8io
[INFO] finished tweaking git repo https://github.com/apiel/v8io
[INFO] tweaked toml for git repo https://github.com/apiel/v8io written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/apiel/v8io 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 thiserror v1.0.19
[INFO] [stderr]   Downloaded which v4.0.0
[INFO] [stderr]   Downloaded thiserror-impl v1.0.19
[INFO] [stderr]   Downloaded syn v1.0.30
[INFO] [stderr]   Downloaded rusty_v8 v0.5.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f79d5ba6d0243f80dcefb7bd11f70b17408800ad9950360c1ec3b4c6ab88c627
[INFO] running `Command { std: "docker" "start" "-a" "f79d5ba6d0243f80dcefb7bd11f70b17408800ad9950360c1ec3b4c6ab88c627", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f79d5ba6d0243f80dcefb7bd11f70b17408800ad9950360c1ec3b4c6ab88c627", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f79d5ba6d0243f80dcefb7bd11f70b17408800ad9950360c1ec3b4c6ab88c627", kill_on_drop: false }`
[INFO] [stdout] f79d5ba6d0243f80dcefb7bd11f70b17408800ad9950360c1ec3b4c6ab88c627
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] dc9b5a9d62684a31ac82b0a8b346206fd0b812a824e1cf9bb3d61c62351d6b0f
[INFO] running `Command { std: "docker" "start" "-a" "dc9b5a9d62684a31ac82b0a8b346206fd0b812a824e1cf9bb3d61c62351d6b0f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cargo_gn v0.0.15
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling thiserror-impl v1.0.19
[INFO] [stderr]    Compiling thiserror v1.0.19
[INFO] [stderr]    Compiling which v4.0.0
[INFO] [stderr]    Compiling rusty_v8 v0.5.1
[INFO] [stderr]     Checking v8io v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> modules/compile.rs:11:44
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let code = std::fs::read_to_string(file.clone()).expect(&err_msg);
[INFO] [stdout]    |                                            ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> modules/compile.rs:11:44
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let code = std::fs::read_to_string(file.clone()).expect(&err_msg);
[INFO] [stdout]    |                                            ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` 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 3.40s
[INFO] running `Command { std: "docker" "inspect" "dc9b5a9d62684a31ac82b0a8b346206fd0b812a824e1cf9bb3d61c62351d6b0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc9b5a9d62684a31ac82b0a8b346206fd0b812a824e1cf9bb3d61c62351d6b0f", kill_on_drop: false }`
[INFO] [stdout] dc9b5a9d62684a31ac82b0a8b346206fd0b812a824e1cf9bb3d61c62351d6b0f
[INFO] checking apiel/v8io against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fapiel%2Fv8io" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/apiel/v8io 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 git repo https://github.com/apiel/v8io
[INFO] finished tweaking git repo https://github.com/apiel/v8io
[INFO] tweaked toml for git repo https://github.com/apiel/v8io written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/apiel/v8io 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 561227aeeda307c529a59f1d43c3d03187a278c0d73894c148454b036514ca19
[INFO] running `Command { std: "docker" "start" "-a" "561227aeeda307c529a59f1d43c3d03187a278c0d73894c148454b036514ca19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "561227aeeda307c529a59f1d43c3d03187a278c0d73894c148454b036514ca19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "561227aeeda307c529a59f1d43c3d03187a278c0d73894c148454b036514ca19", kill_on_drop: false }`
[INFO] [stdout] 561227aeeda307c529a59f1d43c3d03187a278c0d73894c148454b036514ca19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 6978dac82ca2837671e8939db1d62a00fe732239e50bb9a11a2f44623856fa3e
[INFO] running `Command { std: "docker" "start" "-a" "6978dac82ca2837671e8939db1d62a00fe732239e50bb9a11a2f44623856fa3e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.30
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cargo_gn v0.0.15
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling libloading v0.5.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling thiserror-impl v1.0.19
[INFO] [stderr]    Compiling thiserror v1.0.19
[INFO] [stderr]    Compiling which v4.0.0
[INFO] [stderr]    Compiling rusty_v8 v0.5.1
[INFO] [stderr]     Checking v8io v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> main.rs:33:3
[INFO] [stdout]    |
[INFO] [stdout] 33 | /   match std::env::var("V8IO_BOOSTRAP") {
[INFO] [stdout] 34 | |     Ok(val) => return val,
[INFO] [stdout] 35 | |     Err(_) => {
[INFO] [stdout] 36 | |       let file = std::env::current_exe()
[INFO] [stdout] ...  |
[INFO] [stdout] 42 | |     }
[INFO] [stdout] 43 | |   };
[INFO] [stdout]    | |___^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> main.rs:33:3
[INFO] [stdout]    |
[INFO] [stdout] 33 | /   match std::env::var("V8IO_BOOSTRAP") {
[INFO] [stdout] 34 | |     Ok(val) => return val,
[INFO] [stdout] 35 | |     Err(_) => {
[INFO] [stdout] 36 | |       let file = std::env::current_exe()
[INFO] [stdout] ...  |
[INFO] [stdout] 42 | |     }
[INFO] [stdout] 43 | |   };
[INFO] [stdout]    | |___^ cannot infer type
[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] [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 `v8io` (bin "v8io") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `v8io` (bin "v8io" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "6978dac82ca2837671e8939db1d62a00fe732239e50bb9a11a2f44623856fa3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6978dac82ca2837671e8939db1d62a00fe732239e50bb9a11a2f44623856fa3e", kill_on_drop: false }`
[INFO] [stdout] 6978dac82ca2837671e8939db1d62a00fe732239e50bb9a11a2f44623856fa3e