[INFO] fetching crate derive-visitor 0.4.0...
[INFO] testing derive-visitor-0.4.0 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate derive-visitor 0.4.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate derive-visitor 0.4.0
[INFO] finished tweaking crates.io crate derive-visitor 0.4.0
[INFO] tweaked toml for crates.io crate derive-visitor 0.4.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate derive-visitor 0.4.0 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "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" "+b83b707f97d809763b7861afa7638871f3339a33" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 8 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6d485aefed20adb6f9ca8f4a0099acfb9e94ace5d27539259a893e64b5dbf99d
[INFO] running `Command { std: "docker" "start" "-a" "6d485aefed20adb6f9ca8f4a0099acfb9e94ace5d27539259a893e64b5dbf99d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d485aefed20adb6f9ca8f4a0099acfb9e94ace5d27539259a893e64b5dbf99d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d485aefed20adb6f9ca8f4a0099acfb9e94ace5d27539259a893e64b5dbf99d", kill_on_drop: false }`
[INFO] [stdout] 6d485aefed20adb6f9ca8f4a0099acfb9e94ace5d27539259a893e64b5dbf99d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c26b5dd59eae2a268d96648e84e68438acecfbf10ac111b163244d77e3c09b67
[INFO] running `Command { std: "docker" "start" "-a" "c26b5dd59eae2a268d96648e84e68438acecfbf10ac111b163244d77e3c09b67", kill_on_drop: false }`
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling derive-visitor-macros v0.4.0
[INFO] [stderr]    Compiling derive-visitor v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over a `&Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:572:1
[INFO] [stdout]     |
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 while let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 if let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&mut Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:572:1
[INFO] [stdout]     |
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 while let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 if let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:573:1
[INFO] [stdout]     |
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 while let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 if let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&mut Result`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:573:1
[INFO] [stdout]     |
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 while let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 if let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.07s
[INFO] running `Command { std: "docker" "inspect" "c26b5dd59eae2a268d96648e84e68438acecfbf10ac111b163244d77e3c09b67", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c26b5dd59eae2a268d96648e84e68438acecfbf10ac111b163244d77e3c09b67", kill_on_drop: false }`
[INFO] [stdout] c26b5dd59eae2a268d96648e84e68438acecfbf10ac111b163244d77e3c09b67
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bbefd34c6df4084ddb97523f87f0f5befec032d2bd8ffc0ed07fac50079f1f8
[INFO] running `Command { std: "docker" "start" "-a" "5bbefd34c6df4084ddb97523f87f0f5befec032d2bd8ffc0ed07fac50079f1f8", kill_on_drop: false }`
[INFO] [stdout] warning: for loop over a `&Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:572:1
[INFO] [stdout]     |
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 while let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 if let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&mut Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:572:1
[INFO] [stdout]     |
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 while let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 if let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:573:1
[INFO] [stdout]     |
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 while let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 if let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling derive-visitor v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over a `&mut Result`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:573:1
[INFO] [stdout]     |
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 while let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 if let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:572:1
[INFO] [stdout]     |
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 while let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 if let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&mut Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:572:1
[INFO] [stdout]     |
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 while let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 if let Some() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:573:1
[INFO] [stdout]     |
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 while let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 -                 for item in self {
[INFO] [stdout] 544 +                 if let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over a `&mut Result`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/lib.rs:573:1
[INFO] [stdout]     |
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 while let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 -                 for item in self {
[INFO] [stdout] 557 +                 if let Ok() =  in self {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.29s
[INFO] running `Command { std: "docker" "inspect" "5bbefd34c6df4084ddb97523f87f0f5befec032d2bd8ffc0ed07fac50079f1f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bbefd34c6df4084ddb97523f87f0f5befec032d2bd8ffc0ed07fac50079f1f8", kill_on_drop: false }`
[INFO] [stdout] 5bbefd34c6df4084ddb97523f87f0f5befec032d2bd8ffc0ed07fac50079f1f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 54f251a91c32e41a36f60b3183e4f590754990ca482f8df3efb7bc517c2adf13
[INFO] running `Command { std: "docker" "start" "-a" "54f251a91c32e41a36f60b3183e4f590754990ca482f8df3efb7bc517c2adf13", kill_on_drop: false }`
[INFO] [stderr] warning: for loop over a `&Option`. This is more readably written as an `if let` statement
[INFO] [stderr]    --> src/lib.rs:572:1
[INFO] [stderr]     |
[INFO] [stderr] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stderr] help: to check pattern in a loop use `while let`
[INFO] [stderr]     |
[INFO] [stderr] 544 -                 for item in self {
[INFO] [stderr] 544 +                 while let Some() =  in self {
[INFO] [stderr]     |
[INFO] [stderr] help: consider using `if let` to clear intent
[INFO] [stderr]     |
[INFO] [stderr] 544 -                 for item in self {
[INFO] [stderr] 544 +                 if let Some() =  in self {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: for loop over a `&mut Option`. This is more readably written as an `if let` statement
[INFO] [stderr]    --> src/lib.rs:572:1
[INFO] [stderr]     |
[INFO] [stderr] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: to check pattern in a loop use `while let`
[INFO] [stderr]     |
[INFO] [stderr] 557 -                 for item in self {
[INFO] [stderr] 557 +                 while let Some() =  in self {
[INFO] [stderr]     |
[INFO] [stderr] help: consider using `if let` to clear intent
[INFO] [stderr]     |
[INFO] [stderr] 557 -                 for item in self {
[INFO] [stderr] 557 +                 if let Some() =  in self {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: for loop over a `&Result`. This is more readably written as an `if let` statement
[INFO] [stderr]    --> src/lib.rs:573:1
[INFO] [stderr]     |
[INFO] [stderr] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: to check pattern in a loop use `while let`
[INFO] [stderr]     |
[INFO] [stderr] 544 -                 for item in self {
[INFO] [stderr] 544 +                 while let Ok() =  in self {
[INFO] [stderr]     |
[INFO] [stderr] help: consider using `if let` to clear intent
[INFO] [stderr]     |
[INFO] [stderr] 544 -                 for item in self {
[INFO] [stderr] 544 +                 if let Ok() =  in self {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: for loop over a `&mut Result`. This is more readably written as an `if let` statement
[INFO] [stderr]    --> src/lib.rs:573:1
[INFO] [stderr]     |
[INFO] [stderr] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: to check pattern in a loop use `while let`
[INFO] [stderr]     |
[INFO] [stderr] 557 -                 for item in self {
[INFO] [stderr] 557 +                 while let Ok() =  in self {
[INFO] [stderr]     |
[INFO] [stderr] help: consider using `if let` to clear intent
[INFO] [stderr]     |
[INFO] [stderr] 557 -                 for item in self {
[INFO] [stderr] 557 +                 if let Ok() =  in self {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `derive-visitor` (lib) generated 4 warnings
[INFO] [stderr] warning: `derive-visitor` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/derive_visitor-dfc9db2e18c7158c)
[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 tests/test_containers.rs (/opt/rustwide/target/debug/deps/test_containers-8d4b7b237e4f6949)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr]      Running tests/test_std_types.rs (/opt/rustwide/target/debug/deps/test_std_types-44dcd32cfd7419f6)
[INFO] [stdout] test test_containers ... ok
[INFO] [stdout] test test_containers_mut ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/test_visitor_mut.rs (/opt/rustwide/target/debug/deps/test_visitor_mut-7a26eda8be77e420)
[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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests derive_visitor
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test src/lib.rs - Drive (line 368) ... ignored
[INFO] [stdout] test src/lib.rs - Drive (line 394) ... ignored
[INFO] [stdout] test src/lib.rs - Drive (line 446) ... ignored
[INFO] [stdout] test src/lib.rs - Visitor (line 159) ... ignored
[INFO] [stdout] test src/lib.rs - Visitor (line 186) ... ignored
[INFO] [stdout] test src/lib.rs - Visitor (line 200) ... ignored
[INFO] [stdout] test src/lib.rs - Visitor (line 219) ... ignored
[INFO] [stdout] test src/lib.rs - visitor_fn_mut (line 290) ... ok
[INFO] [stdout] test src/lib.rs - VisitorMut (line 249) ... ok
[INFO] [stdout] test src/lib.rs - (line 17) ... ok
[INFO] [stdout] test src/lib.rs - visitor_fn (line 273) ... ok
[INFO] [stdout] test src/lib.rs - DriveMut (line 470) ... ok
[INFO] [stdout] test src/lib.rs - (line 83) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 7 ignored; 0 measured; 0 filtered out; finished in 0.20s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "54f251a91c32e41a36f60b3183e4f590754990ca482f8df3efb7bc517c2adf13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54f251a91c32e41a36f60b3183e4f590754990ca482f8df3efb7bc517c2adf13", kill_on_drop: false }`
[INFO] [stdout] 54f251a91c32e41a36f60b3183e4f590754990ca482f8df3efb7bc517c2adf13