[INFO] fetching crate creche 0.2.1...
[INFO] testing creche-0.2.1 against 1.90.0 for beta-1.91-3
[INFO] extracting crate creche 0.2.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate creche 0.2.1
[INFO] finished tweaking crates.io crate creche 0.2.1
[INFO] tweaked toml for crates.io crate creche 0.2.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate creche 0.2.1 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate creche 0.2.1 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f886dfcdaebde8e16deaa31da3c8d8bba3097c08955006d23ab25d7f01ef111
[INFO] running `Command { std: "docker" "start" "-a" "2f886dfcdaebde8e16deaa31da3c8d8bba3097c08955006d23ab25d7f01ef111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f886dfcdaebde8e16deaa31da3c8d8bba3097c08955006d23ab25d7f01ef111", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f886dfcdaebde8e16deaa31da3c8d8bba3097c08955006d23ab25d7f01ef111", kill_on_drop: false }`
[INFO] [stdout] 2f886dfcdaebde8e16deaa31da3c8d8bba3097c08955006d23ab25d7f01ef111
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e2b737bca153c5bff89bc49b453183b9a7eef42f2af6741142ee74d722faa66e
[INFO] running `Command { std: "docker" "start" "-a" "e2b737bca153c5bff89bc49b453183b9a7eef42f2af6741142ee74d722faa66e", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg_aliases v0.2.1
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling bitflags v2.6.0
[INFO] [stderr]    Compiling nix v0.29.0
[INFO] [stderr]    Compiling creche v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.57s
[INFO] running `Command { std: "docker" "inspect" "e2b737bca153c5bff89bc49b453183b9a7eef42f2af6741142ee74d722faa66e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2b737bca153c5bff89bc49b453183b9a7eef42f2af6741142ee74d722faa66e", kill_on_drop: false }`
[INFO] [stdout] e2b737bca153c5bff89bc49b453183b9a7eef42f2af6741142ee74d722faa66e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d80f7c7154f7a069b5fa0ae361e0ba28cfc1ca1a08e57a00255f1da31fd0ca24
[INFO] running `Command { std: "docker" "start" "-a" "d80f7c7154f7a069b5fa0ae361e0ba28cfc1ca1a08e57a00255f1da31fd0ca24", kill_on_drop: false }`
[INFO] [stderr]    Compiling creche v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "d80f7c7154f7a069b5fa0ae361e0ba28cfc1ca1a08e57a00255f1da31fd0ca24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d80f7c7154f7a069b5fa0ae361e0ba28cfc1ca1a08e57a00255f1da31fd0ca24", kill_on_drop: false }`
[INFO] [stdout] d80f7c7154f7a069b5fa0ae361e0ba28cfc1ca1a08e57a00255f1da31fd0ca24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 42ebd2bff92def0b693cf622939f896f0798e0879825136930975a8cc6d2f10c
[INFO] running `Command { std: "docker" "start" "-a" "42ebd2bff92def0b693cf622939f896f0798e0879825136930975a8cc6d2f10c", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/creche-605d9e7529359dc0)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests creche
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/creche.rs - creche::ChildHandle (line 281) ... FAILED
[INFO] [stdout] test src/ioconfig.rs - ioconfig::RedirectToFd (line 271) ... FAILED
[INFO] [stdout] test src/ioconfig.rs - ioconfig::RedirectToFd (line 254) ... FAILED
[INFO] [stdout] test src/pipeline.rs - pipeline::SimplePipelineBuilder (line 23) ... FAILED
[INFO] [stdout] test src/creche.rs - creche::ChildBuilder (line 35) ... FAILED
[INFO] [stdout] test src/envconfig.rs - envconfig::EnvironmentBuilder (line 77) ... FAILED
[INFO] [stdout] test src/creche.rs - creche::ChildBuilder (line 21) ... FAILED
[INFO] [stdout] test src/ioconfig.rs - ioconfig::interprocess_pipe (line 172) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/creche.rs - creche::ChildHandle (line 281) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]  --> src/creche.rs:283:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | let mut cmd = ChildBuilder::new("sleep");
[INFO] [stdout]   |               ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ChildBuilder;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `spawn` in this scope
[INFO] [stdout]   --> src/creche.rs:292:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | spawn( move || {
[INFO] [stdout]    | ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout]  2 + use std::thread::spawn;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `sleep` in this scope
[INFO] [stdout]   --> src/creche.rs:293:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     sleep(Duration::from_secs(2));
[INFO] [stdout]    |     ^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing one of these functions
[INFO] [stdout]    |
[INFO] [stdout]  2 + use std::thread::sleep;
[INFO] [stdout]    |
[INFO] [stdout]  2 + use nix::unistd::sleep;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `Duration`
[INFO] [stdout]   --> src/creche.rs:293:11
[INFO] [stdout]    |
[INFO] [stdout] 14 |     sleep(Duration::from_secs(2));
[INFO] [stdout]    |           ^^^^^^^^ use of undeclared type `Duration`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout]  2 + use std::time::Duration;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ioconfig.rs - ioconfig::RedirectToFd (line 271) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]  --> src/ioconfig.rs:277:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | let mut cmd = ChildBuilder::new("cat");
[INFO] [stdout]   |               ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ChildBuilder;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `ioconfig`
[INFO] [stdout]  --> src/ioconfig.rs:278:22
[INFO] [stdout]   |
[INFO] [stdout] 9 | let file_io_config = ioconfig::RedirectToFd::new(file, 0);
[INFO] [stdout]   |                      ^^^^^^^^ use of unresolved module or unlinked crate `ioconfig`
[INFO] [stdout]   |
[INFO] [stdout] help: to make use of source file src/ioconfig.rs, use `mod ioconfig` in this file to declare the module
[INFO] [stdout]   |
[INFO] [stdout] 2 + mod ioconfig;
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ioconfig::RedirectToFd;
[INFO] [stdout]   |
[INFO] [stdout] help: if you import `RedirectToFd`, refer to it directly
[INFO] [stdout]   |
[INFO] [stdout] 9 - let file_io_config = ioconfig::RedirectToFd::new(file, 0);
[INFO] [stdout] 9 + let file_io_config = RedirectToFd::new(file, 0);
[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/ioconfig.rs:275:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_ioconfig_rs_271_0() {
[INFO] [stdout]   |                                      ---------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 6 | let file = f_opts.open("logfile")?;
[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_ioconfig_rs_271_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 3 | // set up the file to read from
[INFO] [stdout] ...
[INFO] [stdout] 13| println!("{:?}", child.wait());
[INFO] [stdout] 14+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ioconfig.rs - ioconfig::RedirectToFd (line 254) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]  --> src/ioconfig.rs:261:15
[INFO] [stdout]   |
[INFO] [stdout] 9 | let mut cmd = ChildBuilder::new("cat");
[INFO] [stdout]   |               ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ChildBuilder;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `ioconfig`
[INFO] [stdout]   --> src/ioconfig.rs:263:25
[INFO] [stdout]    |
[INFO] [stdout] 11 | let logfile_io_config = ioconfig::RedirectToFd::new(file, 2);
[INFO] [stdout]    |                         ^^^^^^^^ use of unresolved module or unlinked crate `ioconfig`
[INFO] [stdout]    |
[INFO] [stdout] help: to make use of source file src/ioconfig.rs, use `mod ioconfig` in this file to declare the module
[INFO] [stdout]    |
[INFO] [stdout]  2 + mod ioconfig;
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout]  2 + use creche::ioconfig::RedirectToFd;
[INFO] [stdout]    |
[INFO] [stdout] help: if you import `RedirectToFd`, refer to it directly
[INFO] [stdout]    |
[INFO] [stdout] 11 - let logfile_io_config = ioconfig::RedirectToFd::new(file, 2);
[INFO] [stdout] 11 + let logfile_io_config = RedirectToFd::new(file, 2);
[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/ioconfig.rs:258:34
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_ioconfig_rs_254_0() {
[INFO] [stdout]   |                                      ---------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 6 | let file = f_opts.open("logfile")?;
[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_ioconfig_rs_254_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout] 3 | // set up log file
[INFO] [stdout] ...
[INFO] [stdout] 15| println!("{:?}", child.wait());
[INFO] [stdout] 16+     Ok(())
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/pipeline.rs - pipeline::SimplePipelineBuilder (line 23) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]  --> src/pipeline.rs:24:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | let mut ls_cmd = ChildBuilder::new("ls");
[INFO] [stdout]   |                  ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ChildBuilder;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]  --> src/pipeline.rs:26:23
[INFO] [stdout]   |
[INFO] [stdout] 5 |    let mut sort_cmd = ChildBuilder::new("sort");
[INFO] [stdout]   |                       ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ChildBuilder;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]  --> src/pipeline.rs:28:21
[INFO] [stdout]   |
[INFO] [stdout] 7 |    let mut tr_cmd = ChildBuilder::new("tr");
[INFO] [stdout]   |                     ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ChildBuilder;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `SimplePipelineBuilder`
[INFO] [stdout]   --> src/pipeline.rs:32:23
[INFO] [stdout]    |
[INFO] [stdout] 11 |    let mut pipeline = SimplePipelineBuilder::new();
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^ use of undeclared type `SimplePipelineBuilder`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout]  2 + use creche::SimplePipelineBuilder;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/creche.rs - creche::ChildBuilder (line 35) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]  --> src/creche.rs:37:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | let mut cmd = ChildBuilder::new("ls");
[INFO] [stdout]   |               ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ChildBuilder;
[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/creche.rs:46:40
[INFO] [stdout]    |
[INFO] [stdout]  2 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_creche_rs_35_0() {
[INFO] [stdout]    |                                      ------------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 13 | let output = std::io::read_to_string(f)?;
[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_creche_rs_35_0() -> Result<(), Box<dyn std::error::Error>> {
[INFO] [stdout]  3 | // configure the child process
[INFO] [stdout] ...
[INFO] [stdout] 16 | println!("exit status: {:?}", child.wait());
[INFO] [stdout] 17 +     Ok(())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0433.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/envconfig.rs - envconfig::EnvironmentBuilder (line 77) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `envconfig`
[INFO] [stdout]  --> src/envconfig.rs:79:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | let mut env = envconfig::EnvironmentBuilder::new();
[INFO] [stdout]   |               ^^^^^^^^^ use of unresolved module or unlinked crate `envconfig`
[INFO] [stdout]   |
[INFO] [stdout] help: to make use of source file src/envconfig.rs, use `mod envconfig` in this file to declare the module
[INFO] [stdout]   |
[INFO] [stdout] 2 + mod envconfig;
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::envconfig::EnvironmentBuilder;
[INFO] [stdout]   |
[INFO] [stdout] help: if you import `EnvironmentBuilder`, refer to it directly
[INFO] [stdout]   |
[INFO] [stdout] 4 - let mut env = envconfig::EnvironmentBuilder::new();
[INFO] [stdout] 4 + let mut env = EnvironmentBuilder::new();
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]  --> src/envconfig.rs:83:15
[INFO] [stdout]   |
[INFO] [stdout] 8 | let mut cmd = ChildBuilder::new("env");
[INFO] [stdout]   |               ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ChildBuilder;
[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 E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/creche.rs - creche::ChildBuilder (line 21) stdout ----
[INFO] [stdout] error[E0599]: cannot write into `File`
[INFO] [stdout]   --> src/creche.rs:30:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | writeln!(f, "this is a test message");
[INFO] [stdout]    |          ^
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1950:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `File` here
[INFO] [stdout]    |
[INFO] [stdout] note: must implement `io::Write`, `fmt::Write`, or have a `write_fmt` method
[INFO] [stdout]   --> src/creche.rs:30:10
[INFO] [stdout]    |
[INFO] [stdout] 12 | writeln!(f, "this is a test message");
[INFO] [stdout]    |          ^
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Write` which provides `write_fmt` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]    |
[INFO] [stdout]  2 + use std::io::Write;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/ioconfig.rs - ioconfig::interprocess_pipe (line 172) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `ioconfig`
[INFO] [stdout]  --> src/ioconfig.rs:175:22
[INFO] [stdout]   |
[INFO] [stdout] 5 | let (mut r, mut w) = ioconfig::interprocess_pipe(0, 1);
[INFO] [stdout]   |                      ^^^^^^^^ use of unresolved module or unlinked crate `ioconfig`
[INFO] [stdout]   |
[INFO] [stdout] help: to make use of source file src/ioconfig.rs, use `mod ioconfig` in this file to declare the module
[INFO] [stdout]   |
[INFO] [stdout] 2 + mod ioconfig;
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this module
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ioconfig;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]  --> src/ioconfig.rs:178:18
[INFO] [stdout]   |
[INFO] [stdout] 8 | let mut tr_cmd = ChildBuilder::new("tr");
[INFO] [stdout]   |                  ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 2 + use creche::ChildBuilder;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `ChildBuilder`
[INFO] [stdout]   --> src/ioconfig.rs:181:20
[INFO] [stdout]    |
[INFO] [stdout] 11 | let mut sort_cmd = ChildBuilder::new("sort");
[INFO] [stdout]    |                    ^^^^^^^^^^^^ use of undeclared type `ChildBuilder`
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout]  2 + use creche::ChildBuilder;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: cannot write into `File`
[INFO] [stdout]   --> src/ioconfig.rs:194:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |     writeln!(f, "{}", line);
[INFO] [stdout]    |              ^
[INFO] [stdout]   --> /rustc/1159e78c4747b02ef996e55082b704c09b970588/library/std/src/io/mod.rs:1950:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `File` here
[INFO] [stdout]    |
[INFO] [stdout] note: must implement `io::Write`, `fmt::Write`, or have a `write_fmt` method
[INFO] [stdout]   --> src/ioconfig.rs:194:14
[INFO] [stdout]    |
[INFO] [stdout] 24 |     writeln!(f, "{}", line);
[INFO] [stdout]    |              ^
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: trait `Write` which provides `write_fmt` is implemented but not in scope; perhaps you want to import it
[INFO] [stdout]    |
[INFO] [stdout]  2 + use std::io::Write;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0599.
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/creche.rs - creche::ChildBuilder (line 21)
[INFO] [stdout]     src/creche.rs - creche::ChildBuilder (line 35)
[INFO] [stdout]     src/creche.rs - creche::ChildHandle (line 281)
[INFO] [stdout]     src/envconfig.rs - envconfig::EnvironmentBuilder (line 77)
[INFO] [stdout]     src/ioconfig.rs - ioconfig::RedirectToFd (line 254)
[INFO] [stdout]     src/ioconfig.rs - ioconfig::RedirectToFd (line 271)
[INFO] [stdout]     src/ioconfig.rs - ioconfig::interprocess_pipe (line 172)
[INFO] [stdout]     src/pipeline.rs - pipeline::SimplePipelineBuilder (line 23)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 8 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.11s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "42ebd2bff92def0b693cf622939f896f0798e0879825136930975a8cc6d2f10c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42ebd2bff92def0b693cf622939f896f0798e0879825136930975a8cc6d2f10c", kill_on_drop: false }`
[INFO] [stdout] 42ebd2bff92def0b693cf622939f896f0798e0879825136930975a8cc6d2f10c