[INFO] fetching crate jsonrpc-core 18.0.0...
[INFO] checking jsonrpc-core-18.0.0 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-2
[INFO] extracting crate jsonrpc-core 18.0.0 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate jsonrpc-core 18.0.0 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jsonrpc-core 18.0.0
[INFO] finished tweaking crates.io crate jsonrpc-core 18.0.0
[INFO] tweaked toml for crates.io crate jsonrpc-core 18.0.0 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate jsonrpc-core 18.0.0 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.9
[INFO] [stderr]   Downloaded serde_derive v1.0.126
[INFO] [stderr]   Downloaded serde v1.0.126
[INFO] [stderr]   Downloaded futures-executor v0.3.15
[INFO] [stderr]   Downloaded futures v0.3.15
[INFO] [stderr]   Downloaded memchr v2.4.0
[INFO] [stderr]   Downloaded futures-util v0.3.15
[INFO] [stderr]   Downloaded syn v1.0.73
[INFO] [stderr]   Downloaded serde_json v1.0.64
[INFO] [stderr]   Downloaded futures-task v0.3.15
[INFO] [stderr]   Downloaded pin-project-lite v0.2.7
[INFO] [stderr]   Downloaded proc-macro-nested v0.1.7
[INFO] [stderr]   Downloaded slab v0.4.3
[INFO] [stderr]   Downloaded log v0.4.14
[INFO] [stderr]   Downloaded proc-macro2 v1.0.27
[INFO] [stderr]   Downloaded itoa v0.4.7
[INFO] [stderr]   Downloaded ryu v1.0.5
[INFO] [stderr]   Downloaded futures-channel v0.3.15
[INFO] [stderr]   Downloaded futures-core v0.3.15
[INFO] [stderr]   Downloaded futures-io v0.3.15
[INFO] [stderr]   Downloaded autocfg v1.0.1
[INFO] [stderr]   Downloaded futures-macro v0.3.15
[INFO] [stderr]   Downloaded futures-sink v0.3.15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc2e8a5f23314e67ddde5ca3a2f6f953d2bbde20aad45aacec046cc98997a61d
[INFO] running `Command { std: "docker" "start" "-a" "cc2e8a5f23314e67ddde5ca3a2f6f953d2bbde20aad45aacec046cc98997a61d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc2e8a5f23314e67ddde5ca3a2f6f953d2bbde20aad45aacec046cc98997a61d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc2e8a5f23314e67ddde5ca3a2f6f953d2bbde20aad45aacec046cc98997a61d", kill_on_drop: false }`
[INFO] [stdout] cc2e8a5f23314e67ddde5ca3a2f6f953d2bbde20aad45aacec046cc98997a61d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 746d2ac98b9d8bc84bf09c7f62cbe25f5dabf9460b21fc3b74b87adc646c021b
[INFO] running `Command { std: "docker" "start" "-a" "746d2ac98b9d8bc84bf09c7f62cbe25f5dabf9460b21fc3b74b87adc646c021b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking futures-sink v0.3.15
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking futures-io v0.3.15
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking futures-executor v0.3.15
[INFO] [stderr]     Checking futures v0.3.15
[INFO] [stderr]     Checking jsonrpc-core v18.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `futures_util` is imported redundantly
[INFO] [stdout]   --> src/io.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 | use futures_util::{self, future, FutureExt};
[INFO] [stdout]    |                    ^^^^ the item `futures_util` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures_util` is imported redundantly
[INFO] [stdout]   --> src/io.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 | use futures_util::{self, future, FutureExt};
[INFO] [stdout]    |                    ^^^^ the item `futures_util` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/types/id.rs:19:6
[INFO] [stdout]    |
[INFO] [stdout] 19 |     use serde_json;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub extern crate serde_json;
[INFO] [stdout]    | ---------------------------- the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/types/params.rs:55:6
[INFO] [stdout]    |
[INFO] [stdout] 55 |     use serde_json;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:37:1
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub extern crate serde_json;
[INFO] [stdout]    | ---------------------------- the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.48s
[INFO] running `Command { std: "docker" "inspect" "746d2ac98b9d8bc84bf09c7f62cbe25f5dabf9460b21fc3b74b87adc646c021b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "746d2ac98b9d8bc84bf09c7f62cbe25f5dabf9460b21fc3b74b87adc646c021b", kill_on_drop: false }`
[INFO] [stdout] 746d2ac98b9d8bc84bf09c7f62cbe25f5dabf9460b21fc3b74b87adc646c021b
[INFO] checking jsonrpc-core-18.0.0 against try#36dbcaee1a55543dfc181be52a69d99ff46ff62f for pr-122960-2
[INFO] extracting crate jsonrpc-core 18.0.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate jsonrpc-core 18.0.0 on toolchain 36dbcaee1a55543dfc181be52a69d99ff46ff62f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate jsonrpc-core 18.0.0
[INFO] finished tweaking crates.io crate jsonrpc-core 18.0.0
[INFO] tweaked toml for crates.io crate jsonrpc-core 18.0.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate jsonrpc-core 18.0.0 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" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 873aa58bc35dbd96fa290a4399f71ea33d61ee2f0b8ab84e2b1c91cd68c6541f
[INFO] running `Command { std: "docker" "start" "-a" "873aa58bc35dbd96fa290a4399f71ea33d61ee2f0b8ab84e2b1c91cd68c6541f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "873aa58bc35dbd96fa290a4399f71ea33d61ee2f0b8ab84e2b1c91cd68c6541f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "873aa58bc35dbd96fa290a4399f71ea33d61ee2f0b8ab84e2b1c91cd68c6541f", kill_on_drop: false }`
[INFO] [stdout] 873aa58bc35dbd96fa290a4399f71ea33d61ee2f0b8ab84e2b1c91cd68c6541f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 603a8cc190720ee4e9f68a73a05a95bd25cac7cf9814276142bb294abec391b7
[INFO] running `Command { std: "docker" "start" "-a" "603a8cc190720ee4e9f68a73a05a95bd25cac7cf9814276142bb294abec391b7", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] skipping non-2021 edition `2018`
[INFO] running `Command { std: "docker" "inspect" "603a8cc190720ee4e9f68a73a05a95bd25cac7cf9814276142bb294abec391b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "603a8cc190720ee4e9f68a73a05a95bd25cac7cf9814276142bb294abec391b7", kill_on_drop: false }`
[INFO] [stdout] 603a8cc190720ee4e9f68a73a05a95bd25cac7cf9814276142bb294abec391b7