[INFO] fetching crate derive-visitor 0.4.0...
[INFO] checking derive-visitor-0.4.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate derive-visitor 0.4.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate derive-visitor 0.4.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]       Adding convert_case v0.4.0 (available: v0.6.0)
[INFO] [stderr]       Adding itertools v0.10.5 (available: v0.13.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.77)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd25af174588e83f17f35568fc6a5294e7fa580e201144960f74f1c545315000
[INFO] running `Command { std: "docker" "start" "-a" "fd25af174588e83f17f35568fc6a5294e7fa580e201144960f74f1c545315000", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd25af174588e83f17f35568fc6a5294e7fa580e201144960f74f1c545315000", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd25af174588e83f17f35568fc6a5294e7fa580e201144960f74f1c545315000", kill_on_drop: false }`
[INFO] [stdout] fd25af174588e83f17f35568fc6a5294e7fa580e201144960f74f1c545315000
[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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1eb7c6648f35f94c0cf260ff53baf6f2737d61dd02ea597842ff59e320bba5b4
[INFO] running `Command { std: "docker" "start" "-a" "1eb7c6648f35f94c0cf260ff53baf6f2737d61dd02ea597842ff59e320bba5b4", 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]     Checking 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:544:29
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 for item in self {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ----------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `impl_drive_for_into_iterator` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 while let Some(item) = self {
[INFO] [stdout]     |                 ~~~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 if let Some(item) = 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:557:29
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 for item in self {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ----------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `impl_drive_for_into_iterator` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 while let Some(item) = self {
[INFO] [stdout]     |                 ~~~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 if let Some(item) = 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:544:29
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 for item in self {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ----------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `impl_drive_for_into_iterator` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 while let Some(item) = self {
[INFO] [stdout]     |                 ~~~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 if let Some(item) = 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:544:29
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 for item in self {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `impl_drive_for_into_iterator` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 while let Ok(item) = self {
[INFO] [stdout]     |                 ~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 if let Ok(item) = 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:557:29
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 for item in self {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 572 | impl_drive_for_into_iterator! { Option<T> ; T }
[INFO] [stdout]     | ----------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `impl_drive_for_into_iterator` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 while let Some(item) = self {
[INFO] [stdout]     |                 ~~~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 if let Some(item) = 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:557:29
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 for item in self {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `impl_drive_for_into_iterator` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 while let Ok(item) = self {
[INFO] [stdout]     |                 ~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 if let Ok(item) = 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:544:29
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 for item in self {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `impl_drive_for_into_iterator` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 while let Ok(item) = self {
[INFO] [stdout]     |                 ~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 544 |                 if let Ok(item) = 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:557:29
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 for item in self {
[INFO] [stdout]     |                             ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 573 | impl_drive_for_into_iterator! { Result<T, U> ; T, U }
[INFO] [stdout]     | ----------------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `impl_drive_for_into_iterator` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 while let Ok(item) = self {
[INFO] [stdout]     |                 ~~~~~~~~~~~~~    ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 557 |                 if let Ok(item) = self {
[INFO] [stdout]     |                 ~~~~~~~~~~    ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `Command { std: "docker" "inspect" "1eb7c6648f35f94c0cf260ff53baf6f2737d61dd02ea597842ff59e320bba5b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eb7c6648f35f94c0cf260ff53baf6f2737d61dd02ea597842ff59e320bba5b4", kill_on_drop: false }`
[INFO] [stdout] 1eb7c6648f35f94c0cf260ff53baf6f2737d61dd02ea597842ff59e320bba5b4