[INFO] fetching crate libscroll 0.2.4...
[INFO] testing libscroll-0.2.4 against 1.91.0 for beta-1.92-2
[INFO] extracting crate libscroll 0.2.4 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate libscroll 0.2.4
[INFO] finished tweaking crates.io crate libscroll 0.2.4
[INFO] tweaked toml for crates.io crate libscroll 0.2.4 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate libscroll 0.2.4 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "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 21 packages to latest compatible versions
[INFO] [stderr]       Adding app_dirs v1.2.1 (available: v2.0.1)
[INFO] [stderr]       Adding flo_curves v0.3.1 (available: v0.8.0)
[INFO] [stderr]       Adding num v0.2.1 (available: v0.4.3)
[INFO] [stderr]       Adding tini v0.1.1 (available: v1.3.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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 shell32-sys v0.1.2
[INFO] [stderr]   Downloaded ole32-sys v0.2.0
[INFO] [stderr]   Downloaded roots v0.0.6
[INFO] [stderr]   Downloaded flo_curves v0.3.1
[INFO] [stderr]   Downloaded tini v0.1.1
[INFO] [stderr]   Downloaded num v0.2.1
[INFO] [stderr]   Downloaded xdg v2.5.2
[INFO] [stderr]   Downloaded app_dirs v1.2.1
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7f12eff45f6e3c96f0b4d5fca43af766e06dbdcb736ef3990108361fa7b84e8f
[INFO] running `Command { std: "docker" "start" "-a" "7f12eff45f6e3c96f0b4d5fca43af766e06dbdcb736ef3990108361fa7b84e8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f12eff45f6e3c96f0b4d5fca43af766e06dbdcb736ef3990108361fa7b84e8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f12eff45f6e3c96f0b4d5fca43af766e06dbdcb736ef3990108361fa7b84e8f", kill_on_drop: false }`
[INFO] [stdout] 7f12eff45f6e3c96f0b4d5fca43af766e06dbdcb736ef3990108361fa7b84e8f
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddd71beffe87413d17a9b21192d261a784e52b797d2833c7cc91271e00169c72
[INFO] running `Command { std: "docker" "start" "-a" "ddd71beffe87413d17a9b21192d261a784e52b797d2833c7cc91271e00169c72", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling xdg v2.5.2
[INFO] [stderr]    Compiling roots v0.0.6
[INFO] [stderr]    Compiling tini v0.1.1
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling app_dirs v1.2.1
[INFO] [stderr]    Compiling flo_curves v0.3.1
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling num-iter v0.1.45
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling libscroll v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(half_open_range_patterns)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `half_open_range_patterns` has been stable since `1.66.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::Borrow`
[INFO] [stdout]  --> src/interpolate.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::borrow::Borrow;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/lib.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `half_open_range_patterns` has been stable since 1.66.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(half_open_range_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `map_first_last` has been stable since 1.66.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(map_first_last)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/interpolate.rs:157:9
[INFO] [stdout]     |
[INFO] [stdout] 155 |           return;
[INFO] [stdout]     |           ------ any code following this expression is unreachable
[INFO] [stdout] 156 |
[INFO] [stdout] 157 | /         println!("Current events are {{{}}}",
[INFO] [stdout] 158 | |                  self.events.iter().fold(
[INFO] [stdout] 159 | |                      String::new(), |s, evt| { s.to_owned() + &evt.to_string()[..] }));
[INFO] [stdout]     | |______________________________________________________________________________________^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout]     = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/interpolate.rs:806:9
[INFO] [stdout]     |
[INFO] [stdout] 805 |         panic!("not implemented");
[INFO] [stdout]     |         ------------------------- any code following this expression is unreachable
[INFO] [stdout] 806 |         0.0
[INFO] [stdout]     |         ^^^ unreachable expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude`
[INFO] [stdout]   --> src/lib.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | use std::io::prelude::*;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `time`
[INFO] [stdout]    --> src/interpolate.rs:343:25
[INFO] [stdout]     |
[INFO] [stdout] 343 |     fn flush(&mut self, time: Time) {
[INFO] [stdout]     |                         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 343 |     fn flush(&mut self, _time: Time) {
[INFO] [stdout]     |                         +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `VALUE_MULTIPLIER`
[INFO] [stdout]     |
[INFO] [stdout] 343 -     fn flush(&mut self, time: Time) {
[INFO] [stdout] 343 +     fn flush(&mut self, VALUE_MULTIPLIER: Time) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `second_after`
[INFO] [stdout]    --> src/interpolate.rs:429:13
[INFO] [stdout]     |
[INFO] [stdout] 429 |         let second_after = match first_after {
[INFO] [stdout]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_after`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]    --> src/interpolate.rs:479:13
[INFO] [stdout]     |
[INFO] [stdout] 479 |         let config = sconfig.read().unwrap();
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `config`
[INFO] [stdout]    --> src/interpolate.rs:485:13
[INFO] [stdout]     |
[INFO] [stdout] 485 |         let config = sconfig.read().unwrap();
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_config`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `abs_vel`
[INFO] [stdout]    --> src/interpolate.rs:516:21
[INFO] [stdout]     |
[INFO] [stdout] 516 |                 let abs_vel = velocity.abs();
[INFO] [stdout]     |                     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 516 |                 let _abs_vel = velocity.abs();
[INFO] [stdout]     |                     +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `VALUE_MULTIPLIER`
[INFO] [stdout]     |
[INFO] [stdout] 516 -                 let abs_vel = velocity.abs();
[INFO] [stdout] 516 +                 let VALUE_MULTIPLIER = velocity.abs();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `timedelta`
[INFO] [stdout]    --> src/interpolate.rs:517:21
[INFO] [stdout]     |
[INFO] [stdout] 517 |                 let timedelta = end - start;
[INFO] [stdout]     |                     ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 517 |                 let _timedelta = end - start;
[INFO] [stdout]     |                     +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `VALUE_MULTIPLIER`
[INFO] [stdout]     |
[INFO] [stdout] 517 -                 let timedelta = end - start;
[INFO] [stdout] 517 +                 let VALUE_MULTIPLIER = end - start;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `at`
[INFO] [stdout]    --> src/interpolate.rs:760:51
[INFO] [stdout]     |
[INFO] [stdout] 760 |     fn interpolate_constant(events: &Vec<&Event>, at: Time) -> f64 {
[INFO] [stdout]     |                                                   ^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 760 |     fn interpolate_constant(events: &Vec<&Event>, _at: Time) -> f64 {
[INFO] [stdout]     |                                                   +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `VALUE_MULTIPLIER`
[INFO] [stdout]     |
[INFO] [stdout] 760 -     fn interpolate_constant(events: &Vec<&Event>, at: Time) -> f64 {
[INFO] [stdout] 760 +     fn interpolate_constant(events: &Vec<&Event>, VALUE_MULTIPLIER: Time) -> f64 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `events`
[INFO] [stdout]    --> src/interpolate.rs:803:28
[INFO] [stdout]     |
[INFO] [stdout] 803 |     fn interpolate_hermite(events: &Vec<&Event>, at: Time) -> f64 {
[INFO] [stdout]     |                            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_events`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `at`
[INFO] [stdout]    --> src/interpolate.rs:803:50
[INFO] [stdout]     |
[INFO] [stdout] 803 |     fn interpolate_hermite(events: &Vec<&Event>, at: Time) -> f64 {
[INFO] [stdout]     |                                                  ^^
[INFO] [stdout]     |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]     |
[INFO] [stdout] 803 |     fn interpolate_hermite(events: &Vec<&Event>, _at: Time) -> f64 {
[INFO] [stdout]     |                                                  +
[INFO] [stdout] help: you might have meant to pattern match on the similarly named constant `VALUE_MULTIPLIER`
[INFO] [stdout]     |
[INFO] [stdout] 803 -     fn interpolate_hermite(events: &Vec<&Event>, at: Time) -> f64 {
[INFO] [stdout] 803 +     fn interpolate_hermite(events: &Vec<&Event>, VALUE_MULTIPLIER: Time) -> f64 {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libscroll` (lib) due to 2 previous errors; 16 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ddd71beffe87413d17a9b21192d261a784e52b797d2833c7cc91271e00169c72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddd71beffe87413d17a9b21192d261a784e52b797d2833c7cc91271e00169c72", kill_on_drop: false }`
[INFO] [stdout] ddd71beffe87413d17a9b21192d261a784e52b797d2833c7cc91271e00169c72
