[INFO] fetching crate serde_fmt 1.0.3...
[INFO] testing serde_fmt-1.0.3 against try#b83b707f97d809763b7861afa7638871f3339a33 for pr-145838-1
[INFO] extracting crate serde_fmt 1.0.3 into /workspace/builds/worker-2-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-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_fmt 1.0.3 on toolchain b83b707f97d809763b7861afa7638871f3339a33
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "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" "+b83b707f97d809763b7861afa7638871f3339a33" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2cd63158987281475cab63597793840d92a444c97191c0551706aec15eefc863
[INFO] running `Command { std: "docker" "start" "-a" "2cd63158987281475cab63597793840d92a444c97191c0551706aec15eefc863", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2cd63158987281475cab63597793840d92a444c97191c0551706aec15eefc863", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cd63158987281475cab63597793840d92a444c97191c0551706aec15eefc863", kill_on_drop: false }`
[INFO] [stdout] 2cd63158987281475cab63597793840d92a444c97191c0551706aec15eefc863
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 57fbffcbbe71c312555a40a1c6f4e9341711c958dc8ba1368cfd7022051e6f92
[INFO] running `Command { std: "docker" "start" "-a" "57fbffcbbe71c312555a40a1c6f4e9341711c958dc8ba1368cfd7022051e6f92", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling serde_fmt v1.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.40s
[INFO] running `Command { std: "docker" "inspect" "57fbffcbbe71c312555a40a1c6f4e9341711c958dc8ba1368cfd7022051e6f92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57fbffcbbe71c312555a40a1c6f4e9341711c958dc8ba1368cfd7022051e6f92", kill_on_drop: false }`
[INFO] [stdout] 57fbffcbbe71c312555a40a1c6f4e9341711c958dc8ba1368cfd7022051e6f92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b6d603623fa7f7cd2e41d3cc12bf209d953af8f1bea3ce5d6e0cb858c5ba6833
[INFO] running `Command { std: "docker" "start" "-a" "b6d603623fa7f7cd2e41d3cc12bf209d953af8f1bea3ce5d6e0cb858c5ba6833", 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 0.40s
[INFO] running `Command { std: "docker" "inspect" "b6d603623fa7f7cd2e41d3cc12bf209d953af8f1bea3ce5d6e0cb858c5ba6833", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6d603623fa7f7cd2e41d3cc12bf209d953af8f1bea3ce5d6e0cb858c5ba6833", kill_on_drop: false }`
[INFO] [stdout] b6d603623fa7f7cd2e41d3cc12bf209d953af8f1bea3ce5d6e0cb858c5ba6833
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+b83b707f97d809763b7861afa7638871f3339a33" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] eeedffb00560fde7e3d2e0296b5a72e17fa8d484ea618d7f33f1302bfd65f511
[INFO] running `Command { std: "docker" "start" "-a" "eeedffb00560fde7e3d2e0296b5a72e17fa8d484ea618d7f33f1302bfd65f511", 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 0.01s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/serde_fmt-233d7c8dcd1925c9)
[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::failing_serialize_does_not_panic_to_string ... 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] 
[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 0.10s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "eeedffb00560fde7e3d2e0296b5a72e17fa8d484ea618d7f33f1302bfd65f511", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eeedffb00560fde7e3d2e0296b5a72e17fa8d484ea618d7f33f1302bfd65f511", kill_on_drop: false }`
[INFO] [stdout] eeedffb00560fde7e3d2e0296b5a72e17fa8d484ea618d7f33f1302bfd65f511