[INFO] fetching crate serde 1.0.219...
[INFO] checking serde-1.0.219 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate serde 1.0.219 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate serde 1.0.219
[INFO] finished tweaking crates.io crate serde 1.0.219
[INFO] tweaked toml for crates.io crate serde 1.0.219 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde 1.0.219 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate serde 1.0.219 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6438b3a7011945b66f5de3d1da68759eb673ad256a0c8c09245b87069d1df14
[INFO] running `Command { std: "docker" "start" "-a" "b6438b3a7011945b66f5de3d1da68759eb673ad256a0c8c09245b87069d1df14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6438b3a7011945b66f5de3d1da68759eb673ad256a0c8c09245b87069d1df14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6438b3a7011945b66f5de3d1da68759eb673ad256a0c8c09245b87069d1df14", kill_on_drop: false }`
[INFO] [stdout] b6438b3a7011945b66f5de3d1da68759eb673ad256a0c8c09245b87069d1df14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be44d8e673c1ef51c785ebf4f387b463fa8da67a2cb7e68459f07f4d58fc3e6f
[INFO] running `Command { std: "docker" "start" "-a" "be44d8e673c1ef51c785ebf4f387b463fa8da67a2cb7e68459f07f4d58fc3e6f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling serde v1.0.219 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.39
[INFO] [stderr]    Compiling syn v2.0.99
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/private/de.rs:266:23
[INFO] [stdout]     |
[INFO] [stdout] 266 |         fn unexpected(&self) -> Unexpected {
[INFO] [stdout]     |                       ^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 266 |         fn unexpected(&self) -> Unexpected<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/private/mod.rs:30:35
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn from_utf8_lossy(bytes: &[u8]) -> Cow<str> {
[INFO] [stdout]    |                                   ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                                   |
[INFO] [stdout]    |                                   this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn from_utf8_lossy(bytes: &[u8]) -> Cow<'_, str> {
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/private/de.rs:266:23
[INFO] [stdout]     |
[INFO] [stdout] 266 |         fn unexpected(&self) -> Unexpected {
[INFO] [stdout]     |                       ^^^^^     ---------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                       |
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 266 |         fn unexpected(&self) -> Unexpected<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/private/mod.rs:30:35
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn from_utf8_lossy(bytes: &[u8]) -> Cow<str> {
[INFO] [stdout]    |                                   ^^^^^     -------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |                                   |
[INFO] [stdout]    |                                   this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 30 |     pub fn from_utf8_lossy(bytes: &[u8]) -> Cow<'_, str> {
[INFO] [stdout]    |                                                 +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.84s
[INFO] running `Command { std: "docker" "inspect" "be44d8e673c1ef51c785ebf4f387b463fa8da67a2cb7e68459f07f4d58fc3e6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be44d8e673c1ef51c785ebf4f387b463fa8da67a2cb7e68459f07f4d58fc3e6f", kill_on_drop: false }`
[INFO] [stdout] be44d8e673c1ef51c785ebf4f387b463fa8da67a2cb7e68459f07f4d58fc3e6f