[INFO] cloning repository https://github.com/unborntadpole/mini-shell
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/unborntadpole/mini-shell" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funborntadpole%2Fmini-shell", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funborntadpole%2Fmini-shell'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4ec1fa91520dcaf945c90b3c827ac59d50419f31
[INFO] checking unborntadpole/mini-shell against try#d336647335db03a0fc5b24fc5325cd3905c5b8e8 for pr-151146
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funborntadpole%2Fmini-shell" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/unborntadpole/mini-shell
[INFO] finished tweaking git repo https://github.com/unborntadpole/mini-shell
[INFO] tweaked toml for git repo https://github.com/unborntadpole/mini-shell written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/unborntadpole/mini-shell on toolchain d336647335db03a0fc5b24fc5325cd3905c5b8e8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/unborntadpole/mini-shell 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" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking unborntadpole/mini-shell against try#d336647335db03a0fc5b24fc5325cd3905c5b8e8 for pr-151146
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Funborntadpole%2Fmini-shell" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/unborntadpole/mini-shell
[INFO] finished tweaking git repo https://github.com/unborntadpole/mini-shell
[INFO] tweaked toml for git repo https://github.com/unborntadpole/mini-shell written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/unborntadpole/mini-shell on toolchain d336647335db03a0fc5b24fc5325cd3905c5b8e8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/unborntadpole/mini-shell 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" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d974916ad2743de83482faca1fdbc59a406a9c8e9dbfd96359f70a64c834067
[INFO] running `Command { std: "docker" "start" "-a" "5d974916ad2743de83482faca1fdbc59a406a9c8e9dbfd96359f70a64c834067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d974916ad2743de83482faca1fdbc59a406a9c8e9dbfd96359f70a64c834067", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d974916ad2743de83482faca1fdbc59a406a9c8e9dbfd96359f70a64c834067", kill_on_drop: false }`
[INFO] [stdout] 5d974916ad2743de83482faca1fdbc59a406a9c8e9dbfd96359f70a64c834067
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d6df48e371c01fad7abc30ab9dcb45b167aa72af4b48f9dd69d2b69bab94d9b2
[INFO] running `Command { std: "docker" "start" "-a" "d6df48e371c01fad7abc30ab9dcb45b167aa72af4b48f9dd69d2b69bab94d9b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling nix v0.28.0
[INFO] [stderr]     Checking mini-shell v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 108 | /             execvp(cprog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 109 | |                 eprintln!("exec failed: {}", err);
[INFO] [stdout] 110 | |                 std::process::exit(1);
[INFO] [stdout] 111 | |             });
[INFO] [stdout]     | |______________- any code following this expression is unreachable
[INFO] [stdout] 112 |           }
[INFO] [stdout]     |           ^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]    --> src/main.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 | /             execvp(cprog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 109 | |                 eprintln!("exec failed: {}", err);
[INFO] [stdout] 110 | |                 std::process::exit(1);
[INFO] [stdout] 111 | |             });
[INFO] [stdout]     | |______________^
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:157:9
[INFO] [stdout]     |
[INFO] [stdout] 153 | /             execvp(prog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 154 | |                 eprintln!("left exec failed: {}", err);
[INFO] [stdout] 155 | |                 std::process::exit(1);
[INFO] [stdout] 156 | |             });
[INFO] [stdout]     | |______________- any code following this expression is unreachable
[INFO] [stdout] 157 |           }
[INFO] [stdout]     |           ^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]    --> src/main.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 | /             execvp(prog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 154 | |                 eprintln!("left exec failed: {}", err);
[INFO] [stdout] 155 | |                 std::process::exit(1);
[INFO] [stdout] 156 | |             });
[INFO] [stdout]     | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 180 | /                     execvp(prog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 181 | |                         eprintln!("right exec failed: {}", err);
[INFO] [stdout] 182 | |                         std::process::exit(1);
[INFO] [stdout] 183 | |                     });
[INFO] [stdout]     | |______________________- any code following this expression is unreachable
[INFO] [stdout] 184 |                   }
[INFO] [stdout]     |                   ^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]    --> src/main.rs:180:21
[INFO] [stdout]     |
[INFO] [stdout] 180 | /                     execvp(prog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 181 | |                         eprintln!("right exec failed: {}", err);
[INFO] [stdout] 182 | |                         std::process::exit(1);
[INFO] [stdout] 183 | |                     });
[INFO] [stdout]     | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 108 | /             execvp(cprog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 109 | |                 eprintln!("exec failed: {}", err);
[INFO] [stdout] 110 | |                 std::process::exit(1);
[INFO] [stdout] 111 | |             });
[INFO] [stdout]     | |______________- any code following this expression is unreachable
[INFO] [stdout] 112 |           }
[INFO] [stdout]     |           ^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]    --> src/main.rs:108:13
[INFO] [stdout]     |
[INFO] [stdout] 108 | /             execvp(cprog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 109 | |                 eprintln!("exec failed: {}", err);
[INFO] [stdout] 110 | |                 std::process::exit(1);
[INFO] [stdout] 111 | |             });
[INFO] [stdout]     | |______________^
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:157:9
[INFO] [stdout]     |
[INFO] [stdout] 153 | /             execvp(prog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 154 | |                 eprintln!("left exec failed: {}", err);
[INFO] [stdout] 155 | |                 std::process::exit(1);
[INFO] [stdout] 156 | |             });
[INFO] [stdout]     | |______________- any code following this expression is unreachable
[INFO] [stdout] 157 |           }
[INFO] [stdout]     |           ^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]    --> src/main.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 | /             execvp(prog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 154 | |                 eprintln!("left exec failed: {}", err);
[INFO] [stdout] 155 | |                 std::process::exit(1);
[INFO] [stdout] 156 | |             });
[INFO] [stdout]     | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:184:17
[INFO] [stdout]     |
[INFO] [stdout] 180 | /                     execvp(prog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 181 | |                         eprintln!("right exec failed: {}", err);
[INFO] [stdout] 182 | |                         std::process::exit(1);
[INFO] [stdout] 183 | |                     });
[INFO] [stdout]     | |______________________- any code following this expression is unreachable
[INFO] [stdout] 184 |                   }
[INFO] [stdout]     |                   ^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout] note: this expression has type `Infallible`, which is uninhabited
[INFO] [stdout]    --> src/main.rs:180:21
[INFO] [stdout]     |
[INFO] [stdout] 180 | /                     execvp(prog, &argv_ref).unwrap_or_else(|err| {
[INFO] [stdout] 181 | |                         eprintln!("right exec failed: {}", err);
[INFO] [stdout] 182 | |                         std::process::exit(1);
[INFO] [stdout] 183 | |                     });
[INFO] [stdout]     | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.35s
[INFO] running `Command { std: "docker" "inspect" "d6df48e371c01fad7abc30ab9dcb45b167aa72af4b48f9dd69d2b69bab94d9b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d6df48e371c01fad7abc30ab9dcb45b167aa72af4b48f9dd69d2b69bab94d9b2", kill_on_drop: false }`
[INFO] [stdout] d6df48e371c01fad7abc30ab9dcb45b167aa72af4b48f9dd69d2b69bab94d9b2