[INFO] fetching crate for_ch 0.1.3...
[INFO] testing for_ch-0.1.3 against 1.69.0 for beta-1.70-1
[INFO] extracting crate for_ch 0.1.3 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate for_ch 0.1.3 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate for_ch 0.1.3
[INFO] finished tweaking crates.io crate for_ch 0.1.3
[INFO] tweaked toml for crates.io crate for_ch 0.1.3 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b2f3730da684485d32c554b504eade1eadb8978ead6d5492bb207dc2075bb4b0
[INFO] running `Command { std: "docker" "start" "-a" "b2f3730da684485d32c554b504eade1eadb8978ead6d5492bb207dc2075bb4b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b2f3730da684485d32c554b504eade1eadb8978ead6d5492bb207dc2075bb4b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2f3730da684485d32c554b504eade1eadb8978ead6d5492bb207dc2075bb4b0", kill_on_drop: false }`
[INFO] [stdout] b2f3730da684485d32c554b504eade1eadb8978ead6d5492bb207dc2075bb4b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 621c371d58c3cdaae0e5891bb69404e362e338749c317c0367d700c1ae266d08
[INFO] running `Command { std: "docker" "start" "-a" "621c371d58c3cdaae0e5891bb69404e362e338749c317c0367d700c1ae266d08", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling for_ch v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.96s
[INFO] running `Command { std: "docker" "inspect" "621c371d58c3cdaae0e5891bb69404e362e338749c317c0367d700c1ae266d08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "621c371d58c3cdaae0e5891bb69404e362e338749c317c0367d700c1ae266d08", kill_on_drop: false }`
[INFO] [stdout] 621c371d58c3cdaae0e5891bb69404e362e338749c317c0367d700c1ae266d08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c4dc37197545f2bb85ff5ee83ec89ad2765bd95fa902d910ec35a466dd25186
[INFO] running `Command { std: "docker" "start" "-a" "2c4dc37197545f2bb85ff5ee83ec89ad2765bd95fa902d910ec35a466dd25186", kill_on_drop: false }`
[INFO] [stderr]    Compiling for_ch v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "2c4dc37197545f2bb85ff5ee83ec89ad2765bd95fa902d910ec35a466dd25186", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c4dc37197545f2bb85ff5ee83ec89ad2765bd95fa902d910ec35a466dd25186", kill_on_drop: false }`
[INFO] [stdout] 2c4dc37197545f2bb85ff5ee83ec89ad2765bd95fa902d910ec35a466dd25186
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 239d0e0c2067b05e59482a47a4b7483a132d799fcc3ba86172e93addd70f18c1
[INFO] running `Command { std: "docker" "start" "-a" "239d0e0c2067b05e59482a47a4b7483a132d799fcc3ba86172e93addd70f18c1", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/for_ch-090214a611ceb9aa)
[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 for_ch
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test src/lib.rs - for_ch (line 44) ... FAILED
[INFO] [stdout] test src/lib.rs - for_ch (line 14) ... FAILED
[INFO] [stdout] test src/lib.rs - for_ch (line 59) ... FAILED
[INFO] [stdout] test src/lib.rs - for_ch (line 29) ... FAILED
[INFO] [stdout] test src/lib.rs - for_ch (line 76) ... FAILED
[INFO] [stdout] test src/lib.rs - for_ch (line 66) ... FAILED
[INFO] [stdout] test src/lib.rs - for_ch (line 36) ... FAILED
[INFO] [stdout] test src/lib.rs - for_ch (line 21) ... FAILED
[INFO] [stdout] test src/lib.rs - for_ch (line 51) ... FAILED
[INFO] [stdout] test src/lib.rs - for_ch (line 92) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - for_ch (line 44) stdout ----
[INFO] [stdout] error: expected `{`, found `;`
[INFO] [stdout]  --> src/lib.rs:45:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | if let Some(x) = foo();
[INFO] [stdout]   |                       ^ expected `{`
[INFO] [stdout]   |
[INFO] [stdout] note: the `if` expression is missing a block after this condition
[INFO] [stdout]  --> src/lib.rs:45:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | if let Some(x) = foo();
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - for_ch (line 14) stdout ----
[INFO] [stdout] error: expected `{`, found `;`
[INFO] [stdout]  --> src/lib.rs:15:22
[INFO] [stdout]   |
[INFO] [stdout] 3 | 'label: for x in iter;
[INFO] [stdout]   |                      ^ expected `{`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - for_ch (line 59) stdout ----
[INFO] [stdout] error: expected `{`, found `;`
[INFO] [stdout]  --> src/lib.rs:60:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | if expr;
[INFO] [stdout]   |        ^ expected `{`
[INFO] [stdout]   |
[INFO] [stdout] note: the `if` expression is missing a block after this condition
[INFO] [stdout]  --> src/lib.rs:60:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | if expr;
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - for_ch (line 29) stdout ----
[INFO] [stdout] error: expected `{`, found `,`
[INFO] [stdout]  --> src/lib.rs:30:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | for x in iter1, for y in iter2;
[INFO] [stdout]   |               ^ expected `{`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - for_ch (line 76) stdout ----
[INFO] [stdout] error: cannot find macro `for_ch` in this scope
[INFO] [stdout]  --> src/lib.rs:77:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | for_ch! {
[INFO] [stdout]   | ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider importing this macro:
[INFO] [stdout]           for_ch::for_ch
[INFO] [stdout] note: `for_ch` is imported here, but it is a crate, not a macro
[INFO] [stdout]  --> src/lib.rs:75:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate r#for_ch;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - for_ch (line 66) stdout ----
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]  --> src/lib.rs:68:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ...
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ..
[INFO] [stdout]   |
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ..=
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0586]: inclusive range with no end
[INFO] [stdout]  --> src/lib.rs:68:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ...
[INFO] [stdout]   |     ^^^ help: use `..` instead
[INFO] [stdout]   |
[INFO] [stdout]   = note: inclusive ranges must be bounded at the end (`..=b` or `a..=b`)
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `expr` in this scope
[INFO] [stdout]  --> src/lib.rs:67:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | if expr {
[INFO] [stdout]   |    ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0586.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - for_ch (line 36) stdout ----
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]  --> src/lib.rs:38:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ...
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ..
[INFO] [stdout]   |
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ..=
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0586]: inclusive range with no end
[INFO] [stdout]  --> src/lib.rs:38:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ...
[INFO] [stdout]   |     ^^^ help: use `..` instead
[INFO] [stdout]   |
[INFO] [stdout]   = note: inclusive ranges must be bounded at the end (`..=b` or `a..=b`)
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `iter1` in this scope
[INFO] [stdout]  --> src/lib.rs:37:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | for (x, y) in iter1.into_iter().zip(iter2) {
[INFO] [stdout]   |               ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `iter2` in this scope
[INFO] [stdout]  --> src/lib.rs:37:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | for (x, y) in iter1.into_iter().zip(iter2) {
[INFO] [stdout]   |                                     ^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0586.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - for_ch (line 21) stdout ----
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]  --> src/lib.rs:23:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ...
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ..
[INFO] [stdout]   |
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ..=
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0586]: inclusive range with no end
[INFO] [stdout]  --> src/lib.rs:23:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ...
[INFO] [stdout]   |     ^^^ help: use `..` instead
[INFO] [stdout]   |
[INFO] [stdout]   = note: inclusive ranges must be bounded at the end (`..=b` or `a..=b`)
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `iter` in this scope
[INFO] [stdout]  --> src/lib.rs:22:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | 'label: for x in iter {
[INFO] [stdout]   |                  ^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0586.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - for_ch (line 51) stdout ----
[INFO] [stdout] error: unexpected token: `...`
[INFO] [stdout]  --> src/lib.rs:53:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ...
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout] help: use `..` for an exclusive range
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ..
[INFO] [stdout]   |
[INFO] [stdout] help: or `..=` for an inclusive range
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ..=
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0586]: inclusive range with no end
[INFO] [stdout]  --> src/lib.rs:53:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     ...
[INFO] [stdout]   |     ^^^ help: use `..` instead
[INFO] [stdout]   |
[INFO] [stdout]   = note: inclusive ranges must be bounded at the end (`..=b` or `a..=b`)
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `foo` in this scope
[INFO] [stdout]  --> src/lib.rs:52:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | if let Some(x) = foo() {
[INFO] [stdout]   |                  ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0425, E0586.
[INFO] [stdout] For more information about an error, try `rustc --explain E0425`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] ---- src/lib.rs - for_ch (line 92) stdout ----
[INFO] [stdout] error[E0728]: `await` is only allowed inside `async` functions and blocks
[INFO] [stdout]  --> src/lib.rs:95:35
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_92_0() {
[INFO] [stdout]   |                                         ----------------------------- this is not `async`
[INFO] [stdout] ...
[INFO] [stdout] 5 |         if let Some(z) = foo(x, y).await? {
[INFO] [stdout]   |                                   ^^^^^^ only allowed inside `async` functions and blocks
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `foo` in this scope
[INFO] [stdout]  --> src/lib.rs:95:26
[INFO] [stdout]   |
[INFO] [stdout] 5 |         if let Some(z) = foo(x, y).await? {
[INFO] [stdout]   |                          ^^^ not found in this scope
[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:95:41
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_92_0() {
[INFO] [stdout]   |                                      ---------------------------------- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout] ...
[INFO] [stdout] 5 |         if let Some(z) = foo(x, y).await? {
[INFO] [stdout]   |                                         ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `FromResidual<_>` is not implemented for `()`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot subtract `({integer}, {integer})` from `{integer}`
[INFO] [stdout]  --> src/lib.rs:96:18
[INFO] [stdout]   |
[INFO] [stdout] 6 |             if x - y < z {
[INFO] [stdout]   |                  ^ no implementation for `{integer} - ({integer}, {integer})`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Sub<({integer}, {integer})>` is not implemented for `{integer}`
[INFO] [stdout]   = help: the following other types implement trait `Sub<Rhs>`:
[INFO] [stdout]             <&'a f32 as Sub<f32>>
[INFO] [stdout]             <&'a f64 as Sub<f64>>
[INFO] [stdout]             <&'a i128 as Sub<i128>>
[INFO] [stdout]             <&'a i16 as Sub<i16>>
[INFO] [stdout]             <&'a i32 as Sub<i32>>
[INFO] [stdout]             <&'a i64 as Sub<i64>>
[INFO] [stdout]             <&'a i8 as Sub<i8>>
[INFO] [stdout]             <&'a isize as Sub<isize>>
[INFO] [stdout]           and 48 others
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `({integer}, {integer})` doesn't implement `std::fmt::Display`
[INFO] [stdout]  --> src/lib.rs:97:55
[INFO] [stdout]   |
[INFO] [stdout] 7 |                 println!("x = {}, y = {}, z = {}", x, y, z);
[INFO] [stdout]   |                                                       ^ `({integer}, {integer})` cannot be formatted with the default formatter
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `std::fmt::Display` is not implemented for `({integer}, {integer})`
[INFO] [stdout]   = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout]   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0425, E0728.
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - for_ch (line 14)
[INFO] [stdout]     src/lib.rs - for_ch (line 21)
[INFO] [stdout]     src/lib.rs - for_ch (line 29)
[INFO] [stdout]     src/lib.rs - for_ch (line 36)
[INFO] [stdout]     src/lib.rs - for_ch (line 44)
[INFO] [stdout]     src/lib.rs - for_ch (line 51)
[INFO] [stdout]     src/lib.rs - for_ch (line 59)
[INFO] [stdout]     src/lib.rs - for_ch (line 66)
[INFO] [stdout]     src/lib.rs - for_ch (line 76)
[INFO] [stdout]     src/lib.rs - for_ch (line 92)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 10 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s
[INFO] [stdout] 
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] running `Command { std: "docker" "inspect" "239d0e0c2067b05e59482a47a4b7483a132d799fcc3ba86172e93addd70f18c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "239d0e0c2067b05e59482a47a4b7483a132d799fcc3ba86172e93addd70f18c1", kill_on_drop: false }`
[INFO] [stdout] 239d0e0c2067b05e59482a47a4b7483a132d799fcc3ba86172e93addd70f18c1
