[INFO] fetching crate suspend_fn_proc_macro 0.1.0...
[INFO] checking suspend_fn_proc_macro-0.1.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate suspend_fn_proc_macro 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate suspend_fn_proc_macro 0.1.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate suspend_fn_proc_macro 0.1.0
[INFO] finished tweaking crates.io crate suspend_fn_proc_macro 0.1.0
[INFO] tweaked toml for crates.io crate suspend_fn_proc_macro 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "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 6 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1d0bf860989994d9186479f0bed54eeb8dba26aba3ad83079ba3769f9f1857c6
[INFO] running `Command { std: "docker" "start" "-a" "1d0bf860989994d9186479f0bed54eeb8dba26aba3ad83079ba3769f9f1857c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d0bf860989994d9186479f0bed54eeb8dba26aba3ad83079ba3769f9f1857c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d0bf860989994d9186479f0bed54eeb8dba26aba3ad83079ba3769f9f1857c6", kill_on_drop: false }`
[INFO] [stdout] 1d0bf860989994d9186479f0bed54eeb8dba26aba3ad83079ba3769f9f1857c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fab1dadebad86fa0be661e808ac13b03cf834cb6ca95f9040f1e084939ca8ca9
[INFO] running `Command { std: "docker" "start" "-a" "fab1dadebad86fa0be661e808ac13b03cf834cb6ca95f9040f1e084939ca8ca9", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking proc-macro2 v1.0.86
[INFO] [stderr]     Checking quote v1.0.37
[INFO] [stderr]     Checking syn v1.0.109
[INFO] [stderr]     Checking suspend_fn_proc_macro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over a `&mut Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/expr.rs:231:26
[INFO] [stdout]     |
[INFO] [stdout] 231 |         for (_, expr) in &mut self.guard {
[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] 231 |         while let Some((_, expr)) = &mut self.guard {
[INFO] [stdout]     |         ~~~~~~~~~~~~~~~         ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 231 |         if let Some((_, expr)) = &mut self.guard {
[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/stmt.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |         for (_, expr) in &mut self.init {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 17 |         while let Some((_, expr)) = &mut self.init {
[INFO] [stdout]    |         ~~~~~~~~~~~~~~~         ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 17 |         if let Some((_, expr)) = &mut self.init {
[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/expr.rs:231:26
[INFO] [stdout]     |
[INFO] [stdout] 231 |         for (_, expr) in &mut self.guard {
[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] 231 |         while let Some((_, expr)) = &mut self.guard {
[INFO] [stdout]     |         ~~~~~~~~~~~~~~~         ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 231 |         if let Some((_, expr)) = &mut self.guard {
[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/stmt.rs:17:26
[INFO] [stdout]    |
[INFO] [stdout] 17 |         for (_, expr) in &mut self.init {
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]    |
[INFO] [stdout] 17 |         while let Some((_, expr)) = &mut self.init {
[INFO] [stdout]    |         ~~~~~~~~~~~~~~~         ~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]    |
[INFO] [stdout] 17 |         if let Some((_, expr)) = &mut self.init {
[INFO] [stdout]    |         ~~~~~~~~~~~~         ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.12s
[INFO] running `Command { std: "docker" "inspect" "fab1dadebad86fa0be661e808ac13b03cf834cb6ca95f9040f1e084939ca8ca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fab1dadebad86fa0be661e808ac13b03cf834cb6ca95f9040f1e084939ca8ca9", kill_on_drop: false }`
[INFO] [stdout] fab1dadebad86fa0be661e808ac13b03cf834cb6ca95f9040f1e084939ca8ca9