[INFO] fetching crate serde_fmt 1.0.3...
[INFO] testing serde_fmt-1.0.3 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] extracting crate serde_fmt 1.0.3 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate serde_fmt 1.0.3
[INFO] finished tweaking crates.io crate serde_fmt 1.0.3
[INFO] tweaked toml for crates.io crate serde_fmt 1.0.3 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_fmt 1.0.3 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "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" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9c10fc3527773dc9c4587d5109452b2aeb696ccd75de72430c9ea9fc653107e6
[INFO] running `Command { std: "docker" "start" "-a" "9c10fc3527773dc9c4587d5109452b2aeb696ccd75de72430c9ea9fc653107e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9c10fc3527773dc9c4587d5109452b2aeb696ccd75de72430c9ea9fc653107e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c10fc3527773dc9c4587d5109452b2aeb696ccd75de72430c9ea9fc653107e6", kill_on_drop: false }`
[INFO] [stdout] 9c10fc3527773dc9c4587d5109452b2aeb696ccd75de72430c9ea9fc653107e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9fa1c95e27a1b915b58b753313bdcfb6d7abcb8055f9061da5f5821e0877b52
[INFO] running `Command { std: "docker" "start" "-a" "a9fa1c95e27a1b915b58b753313bdcfb6d7abcb8055f9061da5f5821e0877b52", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling serde_fmt v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.75s
[INFO] running `Command { std: "docker" "inspect" "a9fa1c95e27a1b915b58b753313bdcfb6d7abcb8055f9061da5f5821e0877b52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9fa1c95e27a1b915b58b753313bdcfb6d7abcb8055f9061da5f5821e0877b52", kill_on_drop: false }`
[INFO] [stdout] a9fa1c95e27a1b915b58b753313bdcfb6d7abcb8055f9061da5f5821e0877b52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91a11c5ffb41e6b5304155a72113e9e01bd11bd9d99bc7ded6770fa6706cfec5
[INFO] running `Command { std: "docker" "start" "-a" "91a11c5ffb41e6b5304155a72113e9e01bd11bd9d99bc7ded6770fa6706cfec5", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_fmt v1.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/lib.rs:511:21
[INFO] [stdout]     |
[INFO] [stdout] 511 |     fn check_fmt(v: (impl fmt::Debug + Serialize)) {
[INFO] [stdout]     |                     ^                           ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 511 -     fn check_fmt(v: (impl fmt::Debug + Serialize)) {
[INFO] [stdout] 511 +     fn check_fmt(v: impl fmt::Debug + Serialize) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "91a11c5ffb41e6b5304155a72113e9e01bd11bd9d99bc7ded6770fa6706cfec5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91a11c5ffb41e6b5304155a72113e9e01bd11bd9d99bc7ded6770fa6706cfec5", kill_on_drop: false }`
[INFO] [stdout] 91a11c5ffb41e6b5304155a72113e9e01bd11bd9d99bc7ded6770fa6706cfec5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f821bc88e2a9bc069624a8e4adfe8d50109820a79faea33ca711667e7099f3f1
[INFO] running `Command { std: "docker" "start" "-a" "f821bc88e2a9bc069624a8e4adfe8d50109820a79faea33ca711667e7099f3f1", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:511:21
[INFO] [stderr]     |
[INFO] [stderr] 511 |     fn check_fmt(v: (impl fmt::Debug + Serialize)) {
[INFO] [stderr]     |                     ^                           ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] 511 -     fn check_fmt(v: (impl fmt::Debug + Serialize)) {
[INFO] [stderr] 511 +     fn check_fmt(v: impl fmt::Debug + Serialize) {
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: `serde_fmt` (lib test) generated 1 warning (run `cargo fix --lib -p serde_fmt --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serde_fmt-90cd8bfb3e268908)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::fmt_flags_are_consistent ... ok
[INFO] [stdout] test tests::result_fmt_is_consistent ... ok
[INFO] [stdout] test tests::option_fmt_is_consistent ... ok
[INFO] [stdout] test tests::struct_fmt_is_consitent ... ok
[INFO] [stdout] test tests::tagged_fmt_is_consistent ... ok
[INFO] [stdout] test tests::tuple_fmt_is_consistent ... ok
[INFO] [stdout] test tests::failing_serialize_does_not_panic_to_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests serde_fmt
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 29) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.14s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f821bc88e2a9bc069624a8e4adfe8d50109820a79faea33ca711667e7099f3f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f821bc88e2a9bc069624a8e4adfe8d50109820a79faea33ca711667e7099f3f1", kill_on_drop: false }`
[INFO] [stdout] f821bc88e2a9bc069624a8e4adfe8d50109820a79faea33ca711667e7099f3f1