[INFO] fetching crate bl_save 0.2.0...
[INFO] testing bl_save-0.2.0 against 1.54.0 for beta-1.55-1
[INFO] extracting crate bl_save 0.2.0 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate bl_save 0.2.0 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bl_save 0.2.0
[INFO] finished tweaking crates.io crate bl_save 0.2.0
[INFO] tweaked toml for crates.io crate bl_save 0.2.0 written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d9844b19eb77a708c1df28e745235a0b44aed8ad7df21200c060c184b08ed4f
[INFO] running `Command { std: "docker" "start" "-a" "1d9844b19eb77a708c1df28e745235a0b44aed8ad7df21200c060c184b08ed4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d9844b19eb77a708c1df28e745235a0b44aed8ad7df21200c060c184b08ed4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d9844b19eb77a708c1df28e745235a0b44aed8ad7df21200c060c184b08ed4f", kill_on_drop: false }`
[INFO] [stdout] 1d9844b19eb77a708c1df28e745235a0b44aed8ad7df21200c060c184b08ed4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 13239a57e216d8e4a78210a5d9a0776f73adb0e0a7cdf54299134a1c2190ff17
[INFO] running `Command { std: "docker" "start" "-a" "13239a57e216d8e4a78210a5d9a0776f73adb0e0a7cdf54299134a1c2190ff17", kill_on_drop: false }`
[INFO] [stderr]    Compiling bl_save v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `Command { std: "docker" "inspect" "13239a57e216d8e4a78210a5d9a0776f73adb0e0a7cdf54299134a1c2190ff17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13239a57e216d8e4a78210a5d9a0776f73adb0e0a7cdf54299134a1c2190ff17", kill_on_drop: false }`
[INFO] [stdout] 13239a57e216d8e4a78210a5d9a0776f73adb0e0a7cdf54299134a1c2190ff17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db7eb37b0bcd819328d08f3fd9460f5cf8bb8cbc42b18a184c63df8550993cb0
[INFO] running `Command { std: "docker" "start" "-a" "db7eb37b0bcd819328d08f3fd9460f5cf8bb8cbc42b18a184c63df8550993cb0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling bl_save v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `Command { std: "docker" "inspect" "db7eb37b0bcd819328d08f3fd9460f5cf8bb8cbc42b18a184c63df8550993cb0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db7eb37b0bcd819328d08f3fd9460f5cf8bb8cbc42b18a184c63df8550993cb0", kill_on_drop: false }`
[INFO] [stdout] db7eb37b0bcd819328d08f3fd9460f5cf8bb8cbc42b18a184c63df8550993cb0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 264e029ec67b1584d935bd8a9165d898a258f7e9450332ea22d6b965c9ff06d9
[INFO] running `Command { std: "docker" "start" "-a" "264e029ec67b1584d935bd8a9165d898a258f7e9450332ea22d6b965c9ff06d9", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/bl_save-acfcb5c6093e98bd)
[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]      Running unittests (/opt/rustwide/target/debug/deps/print-cdb2d30ff8d8ce20)
[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 bl_save
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/read.rs - read::Reader<R>::new (line 28) ... FAILED
[INFO] [stdout] test src/lib.rs - (line 8) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/read.rs - read::Reader<R>::new (line 28) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `BufReader`
[INFO] [stdout]  --> src/read.rs:29:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | let file = BufReader::new(File::open("House.bls")?);
[INFO] [stdout]   |            ^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::BufReader;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `File`
[INFO] [stdout]  --> src/read.rs:29:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | let file = BufReader::new(File::open("House.bls")?);
[INFO] [stdout]   |                           ^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::File;
[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/read.rs:29:50
[INFO] [stdout]   |
[INFO] [stdout] 3 |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_read_rs_28_0() {
[INFO] [stdout]   |  ______________________________________-
[INFO] [stdout] 4 | | let file = BufReader::new(File::open("House.bls")?);
[INFO] [stdout]   | |                                                  ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 5 | | let reader = bl_save::Reader::new(file)?;
[INFO] [stdout] 6 | | } _doctest_main_src_read_rs_28_0() }
[INFO] [stdout]   | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `FromResidual<_>` is not implemented for `()`
[INFO] [stdout]   = note: required by `from_residual`
[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/read.rs:30:40
[INFO] [stdout]   |
[INFO] [stdout] 3 |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_read_rs_28_0() {
[INFO] [stdout]   |  ______________________________________-
[INFO] [stdout] 4 | | let file = BufReader::new(File::open("House.bls")?);
[INFO] [stdout] 5 | | let reader = bl_save::Reader::new(file)?;
[INFO] [stdout]   | |                                        ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 6 | | } _doctest_main_src_read_rs_28_0() }
[INFO] [stdout]   | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `FromResidual<Result<Infallible, std::io::Error>>` is not implemented for `()`
[INFO] [stdout]   = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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/lib.rs - (line 8) stdout ----
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `BufReader`
[INFO] [stdout]  --> src/lib.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | let file = BufReader::new(File::open("House.bls")?);
[INFO] [stdout]   |            ^^^^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::BufReader;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type `File`
[INFO] [stdout]  --> src/lib.rs:9:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | let file = BufReader::new(File::open("House.bls")?);
[INFO] [stdout]   |                           ^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::File;
[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:9:50
[INFO] [stdout]    |
[INFO] [stdout] 3  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_8_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 4  | | let file = BufReader::new(File::open("House.bls")?);
[INFO] [stdout]    | |                                                  ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 5  | | let reader = bl_save::Reader::new(file)?;
[INFO] [stdout] 6  | |
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | | }
[INFO] [stdout] 17 | | } _doctest_main_src_lib_rs_8_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<_>` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_residual`
[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:10:40
[INFO] [stdout]    |
[INFO] [stdout] 3  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_8_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 4  | | let file = BufReader::new(File::open("House.bls")?);
[INFO] [stdout] 5  | | let reader = bl_save::Reader::new(file)?;
[INFO] [stdout]    | |                                        ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 6  | |
[INFO] [stdout] ...  |
[INFO] [stdout] 16 | | }
[INFO] [stdout] 17 | | } _doctest_main_src_lib_rs_8_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, std::io::Error>>` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `&str` is not an iterator
[INFO] [stdout]  --> src/lib.rs:12:13
[INFO] [stdout]   |
[INFO] [stdout] 7 | for line in reader.description() {
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^ `&str` is not an iterator; try calling `.chars()` or `.bytes()`
[INFO] [stdout]   |
[INFO] [stdout]   = help: the trait `Iterator` is not implemented for `&str`
[INFO] [stdout]   = note: required because of the requirements on the impl of `IntoIterator` for `&str`
[INFO] [stdout]   = note: required by `into_iter`
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `Option<usize>` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> src/lib.rs:17:29
[INFO] [stdout]    |
[INFO] [stdout] 12 | println!("Brick count: {}", reader.brick_count());
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^ `Option<usize>` cannot be formatted with the default formatter
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::fmt::Display` is not implemented for `Option<usize>`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout]    = note: required by `std::fmt::Display::fmt`
[INFO] [stdout]    = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)
[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:20:22
[INFO] [stdout]    |
[INFO] [stdout] 3  |   fn main() { #[allow(non_snake_case)] fn _doctest_main_src_lib_rs_8_0() {
[INFO] [stdout]    |  ______________________________________-
[INFO] [stdout] 4  | | let file = BufReader::new(File::open("House.bls")?);
[INFO] [stdout] 5  | | let reader = bl_save::Reader::new(file)?;
[INFO] [stdout] 6  | |
[INFO] [stdout] ...  |
[INFO] [stdout] 15 | |     let brick = brick?;
[INFO] [stdout]    | |                      ^ cannot use the `?` operator in a function that returns `()`
[INFO] [stdout] 16 | | }
[INFO] [stdout] 17 | | } _doctest_main_src_lib_rs_8_0() }
[INFO] [stdout]    | |_- this function should return `Result` or `Option` to accept `?`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `FromResidual<Result<Infallible, std::io::Error>>` is not implemented for `()`
[INFO] [stdout]    = note: required by `from_residual`
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 7 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] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - (line 8)
[INFO] [stdout]     src/read.rs - read::Reader<R>::new (line 28)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.17s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "264e029ec67b1584d935bd8a9165d898a258f7e9450332ea22d6b965c9ff06d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "264e029ec67b1584d935bd8a9165d898a258f7e9450332ea22d6b965c9ff06d9", kill_on_drop: false }`
[INFO] [stdout] 264e029ec67b1584d935bd8a9165d898a258f7e9450332ea22d6b965c9ff06d9
