[INFO] fetching crate synapse-rpc 0.1.20...
[INFO] checking synapse-rpc-0.1.20 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate synapse-rpc 0.1.20 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate synapse-rpc 0.1.20 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate synapse-rpc 0.1.20
[INFO] finished tweaking crates.io crate synapse-rpc 0.1.20
[INFO] tweaked toml for crates.io crate synapse-rpc 0.1.20 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 56 packages
[INFO] [stderr]       Adding aho-corasick v0.6.10 (latest: v1.1.3)
[INFO] [stderr]       Adding idna v0.1.5 (latest: v0.5.0)
[INFO] [stderr]       Adding percent-encoding v1.0.1 (latest: v2.3.1)
[INFO] [stderr]       Adding regex v0.2.11 (latest: v1.10.4)
[INFO] [stderr]       Adding regex-syntax v0.5.6 (latest: v0.8.3)
[INFO] [stderr]       Adding thread_local v0.3.6 (latest: v1.1.8)
[INFO] [stderr]       Adding ucd-util v0.1.10 (latest: v0.2.1)
[INFO] [stderr]       Adding url v1.7.2 (latest: v2.5.0)
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded url_serde v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 186d65a6309d1063edc6064b363ceced57dbd2d33d03f91c5f1b6d89208eaab5
[INFO] running `Command { std: "docker" "start" "-a" "186d65a6309d1063edc6064b363ceced57dbd2d33d03f91c5f1b6d89208eaab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "186d65a6309d1063edc6064b363ceced57dbd2d33d03f91c5f1b6d89208eaab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "186d65a6309d1063edc6064b363ceced57dbd2d33d03f91c5f1b6d89208eaab5", kill_on_drop: false }`
[INFO] [stdout] 186d65a6309d1063edc6064b363ceced57dbd2d33d03f91c5f1b6d89208eaab5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c53962903be8addd9969c8f6436034d1ad4434be0bbcef45a5a515ec0210371
[INFO] running `Command { std: "docker" "start" "-a" "6c53962903be8addd9969c8f6436034d1ad4434be0bbcef45a5a515ec0210371", kill_on_drop: false }`
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking url_serde v0.2.0
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking synapse-rpc v0.1.20 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]  --> src/resource.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate serde;
[INFO] [stdout]   | ------------------- the item `serde` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `url_serde` is imported redundantly
[INFO] [stdout]  --> src/resource.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use url_serde;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate url_serde;
[INFO] [stdout]   | ----------------------- the item `url_serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `regex` is imported redundantly
[INFO] [stdout]  --> src/criterion.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use regex::{self, Regex};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate regex;
[INFO] [stdout]   | ------------------- the item `regex` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]  --> src/resource.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate serde;
[INFO] [stdout]   | ------------------- the item `serde` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `url_serde` is imported redundantly
[INFO] [stdout]  --> src/resource.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use url_serde;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate url_serde;
[INFO] [stdout]   | ----------------------- the item `url_serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `regex` is imported redundantly
[INFO] [stdout]  --> src/criterion.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use regex::{self, Regex};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate regex;
[INFO] [stdout]   | ------------------- the item `regex` is already imported here
[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` profile [unoptimized + debuginfo] target(s) in 9.80s
[INFO] running `Command { std: "docker" "inspect" "6c53962903be8addd9969c8f6436034d1ad4434be0bbcef45a5a515ec0210371", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c53962903be8addd9969c8f6436034d1ad4434be0bbcef45a5a515ec0210371", kill_on_drop: false }`
[INFO] [stdout] 6c53962903be8addd9969c8f6436034d1ad4434be0bbcef45a5a515ec0210371
[INFO] checking synapse-rpc-0.1.20 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate synapse-rpc 0.1.20 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate synapse-rpc 0.1.20 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate synapse-rpc 0.1.20
[INFO] finished tweaking crates.io crate synapse-rpc 0.1.20
[INFO] tweaked toml for crates.io crate synapse-rpc 0.1.20 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 56 packages
[INFO] [stderr]       Adding aho-corasick v0.6.10 (latest: v1.1.3)
[INFO] [stderr]       Adding idna v0.1.5 (latest: v0.5.0)
[INFO] [stderr]       Adding percent-encoding v1.0.1 (latest: v2.3.1)
[INFO] [stderr]       Adding regex v0.2.11 (latest: v1.10.4)
[INFO] [stderr]       Adding regex-syntax v0.5.6 (latest: v0.8.3)
[INFO] [stderr]       Adding thread_local v0.3.6 (latest: v1.1.8)
[INFO] [stderr]       Adding ucd-util v0.1.10 (latest: v0.2.1)
[INFO] [stderr]       Adding url v1.7.2 (latest: v2.5.0)
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d755c2103ec852e7f01d01852fe6799529c65d5608c75e14fce0121153e63ab3
[INFO] running `Command { std: "docker" "start" "-a" "d755c2103ec852e7f01d01852fe6799529c65d5608c75e14fce0121153e63ab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d755c2103ec852e7f01d01852fe6799529c65d5608c75e14fce0121153e63ab3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d755c2103ec852e7f01d01852fe6799529c65d5608c75e14fce0121153e63ab3", kill_on_drop: false }`
[INFO] [stdout] d755c2103ec852e7f01d01852fe6799529c65d5608c75e14fce0121153e63ab3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a28194141a5f3a9d2976a445c3d746421fe8328844563ad3790a9f944c5e4ff
[INFO] running `Command { std: "docker" "start" "-a" "0a28194141a5f3a9d2976a445c3d746421fe8328844563ad3790a9f944c5e4ff", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-bidi v0.3.15
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking url_serde v0.2.0
[INFO] [stderr]     Checking chrono v0.4.37
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking synapse-rpc v0.1.20 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]  --> src/resource.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate serde;
[INFO] [stdout]   | ------------------- the item `serde` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `url_serde` is imported redundantly
[INFO] [stdout]  --> src/resource.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use url_serde;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate url_serde;
[INFO] [stdout]   | ----------------------- the item `url_serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `regex` is imported redundantly
[INFO] [stdout]  --> src/criterion.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use regex::{self, Regex};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate regex;
[INFO] [stdout]   | ------------------- the item `regex` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde` is imported redundantly
[INFO] [stdout]  --> src/resource.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde;
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | extern crate serde;
[INFO] [stdout]   | ------------------- the item `serde` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `url_serde` is imported redundantly
[INFO] [stdout]  --> src/resource.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use url_serde;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate url_serde;
[INFO] [stdout]   | ----------------------- the item `url_serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `regex` is imported redundantly
[INFO] [stdout]  --> src/criterion.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 | use regex::{self, Regex};
[INFO] [stdout]   |             ^^^^
[INFO] [stdout]   |
[INFO] [stdout]  ::: src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate regex;
[INFO] [stdout]   | ------------------- the item `regex` is already imported here
[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` profile [unoptimized + debuginfo] target(s) in 10.57s
[INFO] running `Command { std: "docker" "inspect" "0a28194141a5f3a9d2976a445c3d746421fe8328844563ad3790a9f944c5e4ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a28194141a5f3a9d2976a445c3d746421fe8328844563ad3790a9f944c5e4ff", kill_on_drop: false }`
[INFO] [stdout] 0a28194141a5f3a9d2976a445c3d746421fe8328844563ad3790a9f944c5e4ff