[INFO] fetching crate qutonium 0.1.6...
[INFO] checking qutonium-0.1.6 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate qutonium 0.1.6 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate qutonium 0.1.6 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 qutonium 0.1.6
[INFO] finished tweaking crates.io crate qutonium 0.1.6
[INFO] tweaked toml for crates.io crate qutonium 0.1.6 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate qutonium 0.1.6 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mini-internal v0.1.13
[INFO] [stderr]   Downloaded qute v0.0.11
[INFO] [stderr]   Downloaded syn v1.0.44
[INFO] [stderr]   Downloaded miniserde v0.1.13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] d8e1a494b327c70f2418da9c20e1a6ad66412ce1ad8be30f56e4b6d144407feb
[INFO] running `Command { std: "docker" "start" "-a" "d8e1a494b327c70f2418da9c20e1a6ad66412ce1ad8be30f56e4b6d144407feb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8e1a494b327c70f2418da9c20e1a6ad66412ce1ad8be30f56e4b6d144407feb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8e1a494b327c70f2418da9c20e1a6ad66412ce1ad8be30f56e4b6d144407feb", kill_on_drop: false }`
[INFO] [stdout] d8e1a494b327c70f2418da9c20e1a6ad66412ce1ad8be30f56e4b6d144407feb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 55526bdecf8d3edc5f8fd1c528b1584f68a602c848b10db6b331cc60aa353091
[INFO] running `Command { std: "docker" "start" "-a" "55526bdecf8d3edc5f8fd1c528b1584f68a602c848b10db6b331cc60aa353091", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking qute v0.0.11
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling mini-internal v0.1.13
[INFO] [stderr]     Checking miniserde v0.1.13
[INFO] [stderr]     Checking qutonium v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `hooks` and `result` are never read
[INFO] [stdout]   --> src/core/suiter.rs:24:3
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct SuiteCase {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 24 |   hooks: HashMap<HookType, Box<dyn Closure>>,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 25 |   name: &'static str,
[INFO] [stdout] 26 |   result: Option<Suite>,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SuiteCase` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exports/export.rs:39:30
[INFO] [stdout]    |
[INFO] [stdout] 39 |       filename: self.filename.clone(),
[INFO] [stdout]    |                              ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exports/export.rs:40:30
[INFO] [stdout]    |
[INFO] [stdout] 40 |       pathname: self.pathname.clone(),
[INFO] [stdout]    |                              ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `hooks` and `result` are never read
[INFO] [stdout]   --> src/core/suiter.rs:24:3
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct SuiteCase {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 24 |   hooks: HashMap<HookType, Box<dyn Closure>>,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 25 |   name: &'static str,
[INFO] [stdout] 26 |   result: Option<Suite>,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SuiteCase` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exports/export.rs:39:30
[INFO] [stdout]    |
[INFO] [stdout] 39 |       filename: self.filename.clone(),
[INFO] [stdout]    |                              ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exports/export.rs:40:30
[INFO] [stdout]    |
[INFO] [stdout] 40 |       pathname: self.pathname.clone(),
[INFO] [stdout]    |                              ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.83s
[INFO] running `Command { std: "docker" "inspect" "55526bdecf8d3edc5f8fd1c528b1584f68a602c848b10db6b331cc60aa353091", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55526bdecf8d3edc5f8fd1c528b1584f68a602c848b10db6b331cc60aa353091", kill_on_drop: false }`
[INFO] [stdout] 55526bdecf8d3edc5f8fd1c528b1584f68a602c848b10db6b331cc60aa353091
[INFO] checking qutonium-0.1.6 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate qutonium 0.1.6 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate qutonium 0.1.6 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 qutonium 0.1.6
[INFO] finished tweaking crates.io crate qutonium 0.1.6
[INFO] tweaked toml for crates.io crate qutonium 0.1.6 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate qutonium 0.1.6 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] fa9380abccdd790f9113a2e570432af6ebe2b98304695cd4c214389590e47e4b
[INFO] running `Command { std: "docker" "start" "-a" "fa9380abccdd790f9113a2e570432af6ebe2b98304695cd4c214389590e47e4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa9380abccdd790f9113a2e570432af6ebe2b98304695cd4c214389590e47e4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa9380abccdd790f9113a2e570432af6ebe2b98304695cd4c214389590e47e4b", kill_on_drop: false }`
[INFO] [stdout] fa9380abccdd790f9113a2e570432af6ebe2b98304695cd4c214389590e47e4b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 1985b2fae68df31cf6bcfbf030453c8547243c95d205725bbd6abf72c3f59f01
[INFO] running `Command { std: "docker" "start" "-a" "1985b2fae68df31cf6bcfbf030453c8547243c95d205725bbd6abf72c3f59f01", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking qute v0.0.11
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling mini-internal v0.1.13
[INFO] [stderr]     Checking miniserde v0.1.13
[INFO] [stderr]     Checking qutonium v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `hooks` and `result` are never read
[INFO] [stdout]   --> src/core/suiter.rs:24:3
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct SuiteCase {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 24 |   hooks: HashMap<HookType, Box<dyn Closure>>,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 25 |   name: &'static str,
[INFO] [stdout] 26 |   result: Option<Suite>,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SuiteCase` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exports/export.rs:39:30
[INFO] [stdout]    |
[INFO] [stdout] 39 |       filename: self.filename.clone(),
[INFO] [stdout]    |                              ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exports/export.rs:40:30
[INFO] [stdout]    |
[INFO] [stdout] 40 |       pathname: self.pathname.clone(),
[INFO] [stdout]    |                              ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `hooks` and `result` are never read
[INFO] [stdout]   --> src/core/suiter.rs:24:3
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct SuiteCase {
[INFO] [stdout]    |            --------- fields in this struct
[INFO] [stdout] 24 |   hooks: HashMap<HookType, Box<dyn Closure>>,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 25 |   name: &'static str,
[INFO] [stdout] 26 |   result: Option<Suite>,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SuiteCase` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exports/export.rs:39:30
[INFO] [stdout]    |
[INFO] [stdout] 39 |       filename: self.filename.clone(),
[INFO] [stdout]    |                              ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exports/export.rs:40:30
[INFO] [stdout]    |
[INFO] [stdout] 40 |       pathname: self.pathname.clone(),
[INFO] [stdout]    |                              ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.91s
[INFO] running `Command { std: "docker" "inspect" "1985b2fae68df31cf6bcfbf030453c8547243c95d205725bbd6abf72c3f59f01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1985b2fae68df31cf6bcfbf030453c8547243c95d205725bbd6abf72c3f59f01", kill_on_drop: false }`
[INFO] [stdout] 1985b2fae68df31cf6bcfbf030453c8547243c95d205725bbd6abf72c3f59f01