[INFO] fetching crate gdb_probe 0.1.2...
[INFO] testing gdb_probe-0.1.2 against master#1ef7943ee607160a564655b6596f83670ef95df5 for pr-146098-6
[INFO] extracting crate gdb_probe 0.1.2 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate gdb_probe 0.1.2
[INFO] finished tweaking crates.io crate gdb_probe 0.1.2
[INFO] tweaked toml for crates.io crate gdb_probe 0.1.2 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate gdb_probe 0.1.2 on toolchain 1ef7943ee607160a564655b6596f83670ef95df5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages to latest compatible versions
[INFO] [stderr]       Adding nix v0.13.1 (available: v0.30.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nix v0.13.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 12195b49a9a3789f4da027bf01b58f425cd717dbe7351ac444c039d45f1482c7
[INFO] running `Command { std: "docker" "start" "-a" "12195b49a9a3789f4da027bf01b58f425cd717dbe7351ac444c039d45f1482c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12195b49a9a3789f4da027bf01b58f425cd717dbe7351ac444c039d45f1482c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12195b49a9a3789f4da027bf01b58f425cd717dbe7351ac444c039d45f1482c7", kill_on_drop: false }`
[INFO] [stdout] 12195b49a9a3789f4da027bf01b58f425cd717dbe7351ac444c039d45f1482c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09930120d67be33d2ea4eaefdc133392c22ce3435f8e2e849a1013f51aedb64e
[INFO] running `Command { std: "docker" "start" "-a" "09930120d67be33d2ea4eaefdc133392c22ce3435f8e2e849a1013f51aedb64e", kill_on_drop: false }`
[INFO] [stderr]    Compiling nix v0.13.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling gdb_probe v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/lib.rs:20:124
[INFO] [stdout]    |
[INFO] [stdout] 20 |            execvp(&CString::new("urxvt").unwrap(), &argv_c[..]).expect("could not execv terminal, maybe urxvt is missing?");
[INFO] [stdout]    |            ----------------------------------------------------------------------------------------------------------------^ unreachable expression
[INFO] [stdout]    |            |
[INFO] [stdout]    |            any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout] note: this expression has type `void::Void`, which is uninhabited
[INFO] [stdout]   --> src/lib.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |            execvp(&CString::new("urxvt").unwrap(), &argv_c[..]).expect("could not execv terminal, maybe urxvt is missing?");
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]  --> src/lib.rs:9:32
[INFO] [stdout]   |
[INFO] [stdout] 9 |        Ok(ForkResult::Parent { child, .. }) => {
[INFO] [stdout]   |                                ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |            kill(getpid(), Signal::SIGSTOP );
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 11 |            let _ = kill(getpid(), Signal::SIGSTOP );
[INFO] [stdout]    |            +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.75s
[INFO] running `Command { std: "docker" "inspect" "09930120d67be33d2ea4eaefdc133392c22ce3435f8e2e849a1013f51aedb64e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09930120d67be33d2ea4eaefdc133392c22ce3435f8e2e849a1013f51aedb64e", kill_on_drop: false }`
[INFO] [stdout] 09930120d67be33d2ea4eaefdc133392c22ce3435f8e2e849a1013f51aedb64e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e0dc9bc3c8165a801ca66ba83ee7c69a4c571a425db448679118ac409c4b2575
[INFO] running `Command { std: "docker" "start" "-a" "e0dc9bc3c8165a801ca66ba83ee7c69a4c571a425db448679118ac409c4b2575", kill_on_drop: false }`
[INFO] [stderr]    Compiling gdb_probe v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/lib.rs:20:124
[INFO] [stdout]    |
[INFO] [stdout] 20 |            execvp(&CString::new("urxvt").unwrap(), &argv_c[..]).expect("could not execv terminal, maybe urxvt is missing?");
[INFO] [stdout]    |            ----------------------------------------------------------------------------------------------------------------^ unreachable expression
[INFO] [stdout]    |            |
[INFO] [stdout]    |            any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout] note: this expression has type `void::Void`, which is uninhabited
[INFO] [stdout]   --> src/lib.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |            execvp(&CString::new("urxvt").unwrap(), &argv_c[..]).expect("could not execv terminal, maybe urxvt is missing?");
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]  --> src/lib.rs:9:32
[INFO] [stdout]   |
[INFO] [stdout] 9 |        Ok(ForkResult::Parent { child, .. }) => {
[INFO] [stdout]   |                                ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |            kill(getpid(), Signal::SIGSTOP );
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 11 |            let _ = kill(getpid(), Signal::SIGSTOP );
[INFO] [stdout]    |            +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/lib.rs:20:124
[INFO] [stdout]    |
[INFO] [stdout] 20 |            execvp(&CString::new("urxvt").unwrap(), &argv_c[..]).expect("could not execv terminal, maybe urxvt is missing?");
[INFO] [stdout]    |            ----------------------------------------------------------------------------------------------------------------^ unreachable expression
[INFO] [stdout]    |            |
[INFO] [stdout]    |            any code following this expression is unreachable
[INFO] [stdout]    |
[INFO] [stdout] note: this expression has type `void::Void`, which is uninhabited
[INFO] [stdout]   --> src/lib.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |            execvp(&CString::new("urxvt").unwrap(), &argv_c[..]).expect("could not execv terminal, maybe urxvt is missing?");
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `child`
[INFO] [stdout]  --> src/lib.rs:9:32
[INFO] [stdout]   |
[INFO] [stdout] 9 |        Ok(ForkResult::Parent { child, .. }) => {
[INFO] [stdout]   |                                ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib.rs:32:13
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let x = 3+4;
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |            kill(getpid(), Signal::SIGSTOP );
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 11 |            let _ = kill(getpid(), Signal::SIGSTOP );
[INFO] [stdout]    |            +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "e0dc9bc3c8165a801ca66ba83ee7c69a4c571a425db448679118ac409c4b2575", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0dc9bc3c8165a801ca66ba83ee7c69a4c571a425db448679118ac409c4b2575", kill_on_drop: false }`
[INFO] [stdout] e0dc9bc3c8165a801ca66ba83ee7c69a4c571a425db448679118ac409c4b2575
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1ef7943ee607160a564655b6596f83670ef95df5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 74059a2631e7a1b414470c9728c9f3ab55b99cb218d6036829c066c6dc4fefad
[INFO] running `Command { std: "docker" "start" "-a" "74059a2631e7a1b414470c9728c9f3ab55b99cb218d6036829c066c6dc4fefad", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/lib.rs:20:124
[INFO] [stderr]    |
[INFO] [stderr] 20 |            execvp(&CString::new("urxvt").unwrap(), &argv_c[..]).expect("could not execv terminal, maybe urxvt is missing?");
[INFO] [stderr]    |            ----------------------------------------------------------------------------------------------------------------^ unreachable expression
[INFO] [stderr]    |            |
[INFO] [stderr]    |            any code following this expression is unreachable
[INFO] [stderr]    |
[INFO] [stderr] note: this expression has type `void::Void`, which is uninhabited
[INFO] [stderr]   --> src/lib.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |            execvp(&CString::new("urxvt").unwrap(), &argv_c[..]).expect("could not execv terminal, maybe urxvt is missing?");
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `child`
[INFO] [stderr]  --> src/lib.rs:9:32
[INFO] [stderr]   |
[INFO] [stderr] 9 |        Ok(ForkResult::Parent { child, .. }) => {
[INFO] [stderr]   |                                ^^^^^ help: try ignoring the field: `child: _`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/lib.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 |            kill(getpid(), Signal::SIGSTOP );
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 11 |            let _ = kill(getpid(), Signal::SIGSTOP );
[INFO] [stderr]    |            +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/lib.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let x = 3+4;
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: `gdb_probe` (lib) generated 3 warnings (run `cargo fix --lib -p gdb_probe` to apply 1 suggestion)
[INFO] [stderr] warning: `gdb_probe` (lib test) generated 4 warnings (3 duplicates) (run `cargo fix --lib -p gdb_probe --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/gdb_probe-210c32851b4f02d5)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "74059a2631e7a1b414470c9728c9f3ab55b99cb218d6036829c066c6dc4fefad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74059a2631e7a1b414470c9728c9f3ab55b99cb218d6036829c066c6dc4fefad", kill_on_drop: false }`
[INFO] [stdout] 74059a2631e7a1b414470c9728c9f3ab55b99cb218d6036829c066c6dc4fefad
