[INFO] fetching crate flutterbug 0.1.1...
[INFO] testing flutterbug-0.1.1 against 1.100.0-beta.1 for beta-1.100-3
[INFO] extracting crate flutterbug 0.1.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate flutterbug 0.1.1
[INFO] finished tweaking crates.io crate flutterbug 0.1.1
[INFO] tweaked toml for crates.io crate flutterbug 0.1.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate flutterbug 0.1.1 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate flutterbug 0.1.1 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" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280
[INFO] running `Command { std: "docker" "start" "f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.19
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling flutterbug v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling x11 v2.18.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling euclid v0.20.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.16
[INFO] [stderr]    Compiling thiserror v1.0.16
[INFO] [stdout] warning: use of deprecated constant `std::u16::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/color.rs:208:35
[INFO] [stdout]     |
[INFO] [stdout] 208 |         } else if (r == std::u16::MAX) && (g == std::u16::MAX) && (b == std::u16::MAX) {
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::u16::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/color.rs:208:59
[INFO] [stdout]     |
[INFO] [stdout] 208 |         } else if (r == std::u16::MAX) && (g == std::u16::MAX) && (b == std::u16::MAX) {
[INFO] [stdout]     |                                                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::u16::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/color.rs:208:83
[INFO] [stdout]     |
[INFO] [stdout] 208 |         } else if (r == std::u16::MAX) && (g == std::u16::MAX) && (b == std::u16::MAX) {
[INFO] [stdout]     |                                                                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `error_code`, `minor_code`, `request`, and `err_text` are never read
[INFO] [stdout]    --> src/event.rs:894:5
[INFO] [stdout]     |
[INFO] [stdout] 889 | pub struct ErrorEvent {
[INFO] [stdout]     |            ---------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 894 |     error_code: c_uchar,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 895 |     minor_code: c_uchar,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 896 |     request: c_uchar,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 897 |     err_text: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ErrorEvent` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.97s
[INFO] running `Command { std: "docker" "inspect" "f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling servo-fontconfig-sys v4.0.9
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]    Compiling walkdir v2.3.1
[INFO] [stderr]    Compiling float-ord v0.2.0
[INFO] [stdout] warning: use of deprecated constant `std::u16::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/color.rs:208:35
[INFO] [stdout]     |
[INFO] [stdout] 208 |         } else if (r == std::u16::MAX) && (g == std::u16::MAX) && (b == std::u16::MAX) {
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::u16::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/color.rs:208:59
[INFO] [stdout]     |
[INFO] [stdout] 208 |         } else if (r == std::u16::MAX) && (g == std::u16::MAX) && (b == std::u16::MAX) {
[INFO] [stdout]     |                                                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::u16::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/color.rs:208:83
[INFO] [stdout]     |
[INFO] [stdout] 208 |         } else if (r == std::u16::MAX) && (g == std::u16::MAX) && (b == std::u16::MAX) {
[INFO] [stdout]     |                                                                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `error_code`, `minor_code`, `request`, and `err_text` are never read
[INFO] [stdout]    --> src/event.rs:894:5
[INFO] [stdout]     |
[INFO] [stdout] 889 | pub struct ErrorEvent {
[INFO] [stdout]     |            ---------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 894 |     error_code: c_uchar,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 895 |     minor_code: c_uchar,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 896 |     request: c_uchar,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 897 |     err_text: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ErrorEvent` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling cmake v0.1.44
[INFO] [stderr]    Compiling pathfinder_simd v0.5.0
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]    Compiling freetype v0.4.1
[INFO] [stderr]    Compiling servo-fontconfig v0.4.0
[INFO] [stderr]    Compiling pathfinder_geometry v0.5.1
[INFO] [stderr]    Compiling font-kit v0.7.0
[INFO] [stderr]    Compiling flutterbug v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated constant `std::u8::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> examples/font_text.rs:101:35
[INFO] [stdout]     |
[INFO] [stdout] 101 |             let bright = std::u8::MAX - canvas.pixels[loc];
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: a value of type `!` cannot be built from an iterator over elements of type `()`
[INFO] [stdout]    --> examples/font_text.rs:154:20
[INFO] [stdout]     |
[INFO] [stdout] 154 |         .collect::<Result<_, _>>()?;
[INFO] [stdout]     |          -------   ^^^^^^^^^^^^ value of type `!` cannot be built from `std::iter::Iterator<Item=()>`
[INFO] [stdout]     |          |
[INFO] [stdout]     |          required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromIterator<()>` is not implemented for `!`
[INFO] [stdout] help: the trait `FromIterator<Result<T, E>>` is conditionally implemented for `Result<V, E>`
[INFO] [stdout]    --> /rustc/e3feeb59cd1bdd011a2bfcc0747b55125d9b8527/library/core/src/result.rs:2114:14
[INFO] [stdout]     |
[INFO] [stdout]     = note: unsatisfied requirement introduced here: `!: FromIterator<()>`
[INFO] [stdout]     = note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #148922 <https://github.com/rust-lang/rust/issues/148922> for more information)
[INFO] [stdout]     = help: you might have intended to use the type `()` here instead
[INFO] [stdout]     = note: required for `Result<!, anyhow::Error>` to implement `FromIterator<Result<(), anyhow::Error>>`
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]    --> /rustc/e3feeb59cd1bdd011a2bfcc0747b55125d9b8527/library/core/src/iter/traits/iterator.rs:2087:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: a value of type `!` cannot be built from an iterator over elements of type `()`
[INFO] [stdout]    --> examples/font_text.rs:175:32
[INFO] [stdout]     |
[INFO] [stdout] 175 |                     .collect::<Result<_, _>>()?;
[INFO] [stdout]     |                      -------   ^^^^^^^^^^^^ value of type `!` cannot be built from `std::iter::Iterator<Item=()>`
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FromIterator<()>` is not implemented for `!`
[INFO] [stdout] help: the trait `FromIterator<Result<T, E>>` is conditionally implemented for `Result<V, E>`
[INFO] [stdout]    --> /rustc/e3feeb59cd1bdd011a2bfcc0747b55125d9b8527/library/core/src/result.rs:2114:14
[INFO] [stdout]     |
[INFO] [stdout]     = note: unsatisfied requirement introduced here: `!: FromIterator<()>`
[INFO] [stdout]     = note: this error might have been caused by changes to Rust's type-inference algorithm (see issue #148922 <https://github.com/rust-lang/rust/issues/148922> for more information)
[INFO] [stdout]     = help: you might have intended to use the type `()` here instead
[INFO] [stdout]     = note: required for `Result<!, FlutterbugError>` to implement `FromIterator<Result<(), FlutterbugError>>`
[INFO] [stdout] note: required by a bound in `collect`
[INFO] [stdout]    --> /rustc/e3feeb59cd1bdd011a2bfcc0747b55125d9b8527/library/core/src/iter/traits/iterator.rs:2087:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flutterbug` (example "font_text") due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: use of deprecated constant `std::u16::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/color.rs:208:35
[INFO] [stdout]     |
[INFO] [stdout] 208 |         } else if (r == std::u16::MAX) && (g == std::u16::MAX) && (b == std::u16::MAX) {
[INFO] [stdout]     |                                   ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::u16::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/color.rs:208:59
[INFO] [stdout]     |
[INFO] [stdout] 208 |         } else if (r == std::u16::MAX) && (g == std::u16::MAX) && (b == std::u16::MAX) {
[INFO] [stdout]     |                                                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::u16::MAX`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]    --> src/color.rs:208:83
[INFO] [stdout]     |
[INFO] [stdout] 208 |         } else if (r == std::u16::MAX) && (g == std::u16::MAX) && (b == std::u16::MAX) {
[INFO] [stdout]     |                                                                                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `error_code`, `minor_code`, `request`, and `err_text` are never read
[INFO] [stdout]    --> src/event.rs:894:5
[INFO] [stdout]     |
[INFO] [stdout] 889 | pub struct ErrorEvent {
[INFO] [stdout]     |            ---------- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 894 |     error_code: c_uchar,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 895 |     minor_code: c_uchar,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 896 |     request: c_uchar,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 897 |     err_text: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ErrorEvent` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280", kill_on_drop: false }`
[INFO] [stdout] f6877985ac8f88776e1c8978153e717969d681d49a0eb259e85318da0abce280
