[INFO] fetching crate watt 0.5.0...
[INFO] checking watt-0.5.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate watt 0.5.0 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate watt 0.5.0 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 watt 0.5.0
[INFO] finished tweaking crates.io crate watt 0.5.0
[INFO] tweaked toml for crates.io crate watt 0.5.0 written to /workspace/builds/worker-0-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] 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] d3a59b3558bb114ff929b6c26095922f98ad6c82013121a04fba0f05510cd26d
[INFO] running `Command { std: "docker" "start" "-a" "d3a59b3558bb114ff929b6c26095922f98ad6c82013121a04fba0f05510cd26d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3a59b3558bb114ff929b6c26095922f98ad6c82013121a04fba0f05510cd26d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3a59b3558bb114ff929b6c26095922f98ad6c82013121a04fba0f05510cd26d", kill_on_drop: false }`
[INFO] [stdout] d3a59b3558bb114ff929b6c26095922f98ad6c82013121a04fba0f05510cd26d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 9f546be9a6a3cd77db2354f128436651b57ec9ede9e6b318af708ca6e37f791c
[INFO] running `Command { std: "docker" "start" "-a" "9f546be9a6a3cd77db2354f128436651b57ec9ede9e6b318af708ca6e37f791c", kill_on_drop: false }`
[INFO] [stderr]     Checking watt v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `is_canonical_nan` is never used
[INFO] [stdout]    --> src/../runtime/src/ops.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 260 | pub trait FloatOp {
[INFO] [stdout]     |           ------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 298 |     fn is_canonical_nan(self) -> bool;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mutable` is never read
[INFO] [stdout]   --> src/../runtime/src/runtime.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct GlobalInst {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 30 |     pub value: values::Value,
[INFO] [stdout] 31 |     pub mutable: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `max` is never read
[INFO] [stdout]   --> src/../runtime/src/runtime.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub struct TableInst {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 56 |     pub elem: Vec<FuncElem>,
[INFO] [stdout] 57 |     pub max: Option<u32>,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_canonical_nan` is never used
[INFO] [stdout]    --> src/../runtime/src/ops.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 260 | pub trait FloatOp {
[INFO] [stdout]     |           ------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 298 |     fn is_canonical_nan(self) -> bool;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mutable` is never read
[INFO] [stdout]   --> src/../runtime/src/runtime.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct GlobalInst {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 30 |     pub value: values::Value,
[INFO] [stdout] 31 |     pub mutable: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `max` is never read
[INFO] [stdout]   --> src/../runtime/src/runtime.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub struct TableInst {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 56 |     pub elem: Vec<FuncElem>,
[INFO] [stdout] 57 |     pub max: Option<u32>,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "9f546be9a6a3cd77db2354f128436651b57ec9ede9e6b318af708ca6e37f791c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f546be9a6a3cd77db2354f128436651b57ec9ede9e6b318af708ca6e37f791c", kill_on_drop: false }`
[INFO] [stdout] 9f546be9a6a3cd77db2354f128436651b57ec9ede9e6b318af708ca6e37f791c
[INFO] checking watt-0.5.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate watt 0.5.0 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate watt 0.5.0 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 watt 0.5.0
[INFO] finished tweaking crates.io crate watt 0.5.0
[INFO] tweaked toml for crates.io crate watt 0.5.0 written to /workspace/builds/worker-0-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] 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] d08bbabf467dfe653119676bccd212070a7181e904f64eeb72d353074adfe15f
[INFO] running `Command { std: "docker" "start" "-a" "d08bbabf467dfe653119676bccd212070a7181e904f64eeb72d353074adfe15f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d08bbabf467dfe653119676bccd212070a7181e904f64eeb72d353074adfe15f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d08bbabf467dfe653119676bccd212070a7181e904f64eeb72d353074adfe15f", kill_on_drop: false }`
[INFO] [stdout] d08bbabf467dfe653119676bccd212070a7181e904f64eeb72d353074adfe15f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 644f06f7e4c944ceda96a0d969c2c81922f219f377e85d6b1d116bbc0357c40d
[INFO] running `Command { std: "docker" "start" "-a" "644f06f7e4c944ceda96a0d969c2c81922f219f377e85d6b1d116bbc0357c40d", kill_on_drop: false }`
[INFO] [stderr]     Checking watt v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `is_canonical_nan` is never used
[INFO] [stdout]    --> src/../runtime/src/ops.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 260 | pub trait FloatOp {
[INFO] [stdout]     |           ------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 298 |     fn is_canonical_nan(self) -> bool;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mutable` is never read
[INFO] [stdout]   --> src/../runtime/src/runtime.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct GlobalInst {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 30 |     pub value: values::Value,
[INFO] [stdout] 31 |     pub mutable: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `max` is never read
[INFO] [stdout]   --> src/../runtime/src/runtime.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub struct TableInst {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 56 |     pub elem: Vec<FuncElem>,
[INFO] [stdout] 57 |     pub max: Option<u32>,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_canonical_nan` is never used
[INFO] [stdout]    --> src/../runtime/src/ops.rs:298:8
[INFO] [stdout]     |
[INFO] [stdout] 260 | pub trait FloatOp {
[INFO] [stdout]     |           ------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 298 |     fn is_canonical_nan(self) -> bool;
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mutable` is never read
[INFO] [stdout]   --> src/../runtime/src/runtime.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct GlobalInst {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 30 |     pub value: values::Value,
[INFO] [stdout] 31 |     pub mutable: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `max` is never read
[INFO] [stdout]   --> src/../runtime/src/runtime.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub struct TableInst {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 56 |     pub elem: Vec<FuncElem>,
[INFO] [stdout] 57 |     pub max: Option<u32>,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `Command { std: "docker" "inspect" "644f06f7e4c944ceda96a0d969c2c81922f219f377e85d6b1d116bbc0357c40d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "644f06f7e4c944ceda96a0d969c2c81922f219f377e85d6b1d116bbc0357c40d", kill_on_drop: false }`
[INFO] [stdout] 644f06f7e4c944ceda96a0d969c2c81922f219f377e85d6b1d116bbc0357c40d