[INFO] fetching crate pty-exec 0.1.0...
[INFO] testing pty-exec-0.1.0 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate pty-exec 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate pty-exec 0.1.0
[INFO] finished tweaking crates.io crate pty-exec 0.1.0
[INFO] tweaked toml for crates.io crate pty-exec 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate pty-exec 0.1.0 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "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" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to highest compatible versions
[INFO] [stderr]       Adding nix v0.26.4 (available: v0.31.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "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/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a
[INFO] running `Command { std: "docker" "start" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]    Compiling libc v0.2.191
[INFO] [stderr]    Compiling pin-utils v0.1.1
[INFO] [stderr]    Compiling nix v0.26.4
[INFO] [stderr]    Compiling pty-exec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 6.89s
[INFO] running `Command { std: "docker" "inspect" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling pty-exec v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.85s
[INFO] running `Command { std: "docker" "inspect" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--release", kill_on_drop: false }`
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/release/build/pty-exec/94f072311424d4e4/out/pty_exec-94f072311424d4e4)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test unix::shell::tests::shell_from_env ... ok
[INFO] [stdout] test tests::spawn ... ok
[INFO] [stderr]    Doc-tests pty_exec
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.31s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 1) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - (line 1) stdout ----
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/lib.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout]  2 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_1_0() {
[INFO] [stdout]    |                                      --------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 11 | })?;
[INFO] [stdout]    |   ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout]  2 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_1_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]  3 | use std::os::fd::{AsRawFd, FromRawFd};
[INFO] [stdout] ...
[INFO] [stdout] 19 | pty.kill();
[INFO] [stdout] 20 +     Ok(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`)
[INFO] [stdout]   --> src/lib.rs:17:35
[INFO] [stdout]    |
[INFO] [stdout]  2 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_1_0() {
[INFO] [stdout]    |                                      --------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 17 | pty.write("echo 'Hello, World'\r")?;
[INFO] [stdout]    |                                   ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]    |
[INFO] [stdout] help: consider adding return type
[INFO] [stdout]    |
[INFO] [stdout]  2 ~ fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_1_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]  3 | use std::os::fd::{AsRawFd, FromRawFd};
[INFO] [stdout] ...
[INFO] [stdout] 19 | pty.kill();
[INFO] [stdout] 20 +     Ok(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 1)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.08s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a", kill_on_drop: false }`
[INFO] [stdout] bc8b03727e1dff80acb1125a57688116d124f0807e2dade59e7d15fd6268144a
