[INFO] fetching crate ddshow-sink 0.2.2...
[INFO] checking ddshow-sink-0.2.2 against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] extracting crate ddshow-sink 0.2.2 into /workspace/builds/worker-100/source
[INFO] validating manifest of crates.io crate ddshow-sink 0.2.2 on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ddshow-sink 0.2.2
[INFO] finished tweaking crates.io crate ddshow-sink 0.2.2
[INFO] tweaked toml for crates.io crate ddshow-sink 0.2.2 written to /workspace/builds/worker-100/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87113be4cd93e01183086340c324682b8a7d770f2a1e68a431055ae8cc8601e6
[INFO] running `Command { std: "docker" "start" "-a" "87113be4cd93e01183086340c324682b8a7d770f2a1e68a431055ae8cc8601e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87113be4cd93e01183086340c324682b8a7d770f2a1e68a431055ae8cc8601e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87113be4cd93e01183086340c324682b8a7d770f2a1e68a431055ae8cc8601e6", kill_on_drop: false }`
[INFO] [stdout] 87113be4cd93e01183086340c324682b8a7d770f2a1e68a431055ae8cc8601e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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" "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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5c1f8162378301e296c94ddb9f9b74401813602ec9384f0245a96fd151c2b27
[INFO] running `Command { std: "docker" "start" "-a" "b5c1f8162378301e296c94ddb9f9b74401813602ec9384f0245a96fd151c2b27", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling serde v1.0.128
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling bytecheck v0.6.5
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling rend v0.3.2
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking slab v0.4.4
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking abomonation v0.7.3
[INFO] [stderr]     Checking timely_logging v0.12.0
[INFO] [stderr]     Checking timely_bytes v0.12.0
[INFO] [stderr]    Compiling rkyv v0.7.3
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking seahash v4.1.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]    Compiling synstructure v0.12.5
[INFO] [stderr]    Compiling ptr_meta_derive v0.1.4
[INFO] [stderr]    Compiling serde_derive v1.0.128
[INFO] [stderr]    Compiling abomonation_derive v0.5.0
[INFO] [stderr]    Compiling bytecheck_derive v0.6.5
[INFO] [stderr]    Compiling rkyv_derive v0.7.3
[INFO] [stderr]     Checking ptr_meta v0.1.4
[INFO] [stderr]     Checking timely_communication v0.12.0
[INFO] [stderr]     Checking timely v0.12.0
[INFO] [stderr]     Checking differential-dataflow v0.12.0
[INFO] [stderr]     Checking ddshow-types v0.2.2
[INFO] [stderr]     Checking ddshow-sink v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/writer.rs:69:28
[INFO] [stdout]    |
[INFO] [stdout] 69 |                 if let Err(err) = self.stream.write_all(&PADDING[..padding]) {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/writer.rs:94:20
[INFO] [stdout]    |
[INFO] [stdout] 94 |         if let Err(err) = serializer.serialize_value(&event) {
[INFO] [stdout]    |                    ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/writer.rs:116:20
[INFO] [stdout]     |
[INFO] [stdout] 116 |         if let Err(err) = result {
[INFO] [stdout]     |                    ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/writer.rs:69:28
[INFO] [stdout]    |
[INFO] [stdout] 69 |                 if let Err(err) = self.stream.write_all(&PADDING[..padding]) {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/writer.rs:94:20
[INFO] [stdout]    |
[INFO] [stdout] 94 |         if let Err(err) = serializer.serialize_value(&event) {
[INFO] [stdout]    |                    ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]    --> src/writer.rs:116:20
[INFO] [stdout]     |
[INFO] [stdout] 116 |         if let Err(err) = result {
[INFO] [stdout]     |                    ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.35s
[INFO] running `Command { std: "docker" "inspect" "b5c1f8162378301e296c94ddb9f9b74401813602ec9384f0245a96fd151c2b27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5c1f8162378301e296c94ddb9f9b74401813602ec9384f0245a96fd151c2b27", kill_on_drop: false }`
[INFO] [stdout] b5c1f8162378301e296c94ddb9f9b74401813602ec9384f0245a96fd151c2b27