[INFO] fetching crate rust_hdl_lib_widgets 0.44.0...
[INFO] checking rust_hdl_lib_widgets-0.44.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate rust_hdl_lib_widgets 0.44.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate rust_hdl_lib_widgets 0.44.0 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 rust_hdl_lib_widgets 0.44.0
[INFO] finished tweaking crates.io crate rust_hdl_lib_widgets 0.44.0
[INFO] tweaked toml for crates.io crate rust_hdl_lib_widgets 0.44.0 written to /workspace/builds/worker-4-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]     Updating crates.io index
[INFO] [stderr]      Locking 44 packages
[INFO] [stderr]       Adding base64 v0.13.1 (latest: v0.22.0)
[INFO] [stderr]       Adding evalexpr v6.6.0 (latest: v11.3.0)
[INFO] [stderr]       Adding fixedbitset v0.4.2 (latest: v0.5.6)
[INFO] [stderr]       Adding svg v0.10.0 (latest: v0.16.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding vcd v0.6.1 (latest: v0.7.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded svg v0.10.0
[INFO] [stderr]   Downloaded vcd v0.6.1
[INFO] [stderr]   Downloaded seq-macro v0.3.5
[INFO] [stderr]   Downloaded embed-doc-image v0.1.4
[INFO] [stderr]   Downloaded evalexpr v6.6.0
[INFO] [stderr]   Downloaded rust_hdl_lib_macros v0.44.1
[INFO] [stderr]   Downloaded substring v1.4.5
[INFO] [stderr]   Downloaded rust_hdl_lib_core v0.44.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 01a08a73a091ed9e555f034f724dee7c1e48dbbb7c7c20b4748d70ae71661dc0
[INFO] running `Command { std: "docker" "start" "-a" "01a08a73a091ed9e555f034f724dee7c1e48dbbb7c7c20b4748d70ae71661dc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01a08a73a091ed9e555f034f724dee7c1e48dbbb7c7c20b4748d70ae71661dc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01a08a73a091ed9e555f034f724dee7c1e48dbbb7c7c20b4748d70ae71661dc0", kill_on_drop: false }`
[INFO] [stdout] 01a08a73a091ed9e555f034f724dee7c1e48dbbb7c7c20b4748d70ae71661dc0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 48fc22649f4de0f7e72edf19dfe4f01f47b3e552af7036366ce23178150b0d12
[INFO] running `Command { std: "docker" "start" "-a" "48fc22649f4de0f7e72edf19dfe4f01f47b3e552af7036366ce23178150b0d12", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling substring v1.4.5
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]    Compiling anyhow v1.0.81
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]     Checking array-init v2.1.0
[INFO] [stderr]     Checking svg v0.10.0
[INFO] [stderr]     Checking evalexpr v6.6.0
[INFO] [stderr]     Checking vcd v0.6.1
[INFO] [stderr]    Compiling seq-macro v0.3.5
[INFO] [stderr]     Checking petgraph v0.6.4
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking crossbeam v0.8.4
[INFO] [stderr]    Compiling regex-automata v0.4.6
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]    Compiling regex v1.10.4
[INFO] [stderr]    Compiling rust_hdl_lib_macros v0.44.1
[INFO] [stderr]    Compiling embed-doc-image v0.1.4
[INFO] [stderr]     Checking rust_hdl_lib_core v0.44.1
[INFO] [stderr]     Checking rust_hdl_lib_widgets v0.44.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `dff_setup`
[INFO] [stdout]  --> src/delay_line.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{dff::DFF, dff_setup};
[INFO] [stdout]   |                       ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `dff_setup`
[INFO] [stdout]  --> src/dff_with_init.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{dff::DFF, dff_setup};
[INFO] [stdout]   |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TimingInfo` is imported redundantly
[INFO] [stdout]  --> src/edge_ff.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rust_hdl_lib_core::prelude::*;
[INFO] [stdout]   |     ----------------------------- the item `TimingInfo` is already imported here
[INFO] [stdout] 2 | use rust_hdl_lib_core::timing::TimingInfo;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DFF` is imported redundantly
[INFO] [stdout]  --> src/i2c/i2c_controller.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::dff::DFF;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use crate::{dff_setup, prelude::*};
[INFO] [stdout]   |                        ---------- the item `DFF` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `I2CTestTarget` is imported redundantly
[INFO] [stdout]  --> src/i2c/i2c_controller.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::i2c::i2c_test_target::I2CTestTarget;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 | use crate::{dff_setup, prelude::*};
[INFO] [stdout]   |                        ---------- the item `I2CTestTarget` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `I2CTestBus` is imported redundantly
[INFO] [stdout]  --> src/i2c/i2c_controller.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::{dff_setup, prelude::*};
[INFO] [stdout]   |                        ---------- the item `I2CTestBus` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 8 | use super::i2c_test_target::I2CTestBus;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToSignedBits` is imported redundantly
[INFO] [stdout]  --> src/mac_fir.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rust_hdl_lib_core::prelude::*;
[INFO] [stdout]   |     ----------------------------- the item `ToSignedBits` is already imported here
[INFO] [stdout] 6 | use rust_hdl_lib_core::signed::ToSignedBits;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TimingInfo` is imported redundantly
[INFO] [stdout]  --> src/ramrom/ram.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rust_hdl_lib_core::prelude::*;
[INFO] [stdout]   |     ----------------------------- the item `TimingInfo` is already imported here
[INFO] [stdout] 3 | use rust_hdl_lib_core::timing::TimingInfo;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TimingInfo` is imported redundantly
[INFO] [stdout]  --> src/ramrom/sync_rom.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rust_hdl_lib_core::prelude::*;
[INFO] [stdout]   |     ----------------------------- the item `TimingInfo` is already imported here
[INFO] [stdout] 3 | use rust_hdl_lib_core::timing::TimingInfo;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `dff_setup`
[INFO] [stdout]  --> src/delay_line.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{dff::DFF, dff_setup};
[INFO] [stdout]   |                       ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `dff_setup`
[INFO] [stdout]  --> src/dff_with_init.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{dff::DFF, dff_setup};
[INFO] [stdout]   |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TimingInfo` is imported redundantly
[INFO] [stdout]  --> src/edge_ff.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rust_hdl_lib_core::prelude::*;
[INFO] [stdout]   |     ----------------------------- the item `TimingInfo` is already imported here
[INFO] [stdout] 2 | use rust_hdl_lib_core::timing::TimingInfo;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `DFF` is imported redundantly
[INFO] [stdout]  --> src/i2c/i2c_controller.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::dff::DFF;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use crate::{dff_setup, prelude::*};
[INFO] [stdout]   |                        ---------- the item `DFF` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `I2CTestTarget` is imported redundantly
[INFO] [stdout]  --> src/i2c/i2c_controller.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::i2c::i2c_test_target::I2CTestTarget;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 | use crate::{dff_setup, prelude::*};
[INFO] [stdout]   |                        ---------- the item `I2CTestTarget` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `I2CTestBus` is imported redundantly
[INFO] [stdout]  --> src/i2c/i2c_controller.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::{dff_setup, prelude::*};
[INFO] [stdout]   |                        ---------- the item `I2CTestBus` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 8 | use super::i2c_test_target::I2CTestBus;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ToSignedBits` is imported redundantly
[INFO] [stdout]  --> src/mac_fir.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use rust_hdl_lib_core::prelude::*;
[INFO] [stdout]   |     ----------------------------- the item `ToSignedBits` is already imported here
[INFO] [stdout] 6 | use rust_hdl_lib_core::signed::ToSignedBits;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TimingInfo` is imported redundantly
[INFO] [stdout]  --> src/ramrom/ram.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rust_hdl_lib_core::prelude::*;
[INFO] [stdout]   |     ----------------------------- the item `TimingInfo` is already imported here
[INFO] [stdout] 3 | use rust_hdl_lib_core::timing::TimingInfo;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TimingInfo` is imported redundantly
[INFO] [stdout]  --> src/ramrom/sync_rom.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rust_hdl_lib_core::prelude::*;
[INFO] [stdout]   |     ----------------------------- the item `TimingInfo` is already imported here
[INFO] [stdout] 3 | use rust_hdl_lib_core::timing::TimingInfo;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.28s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: svg v0.10.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 6`
[INFO] running `Command { std: "docker" "inspect" "48fc22649f4de0f7e72edf19dfe4f01f47b3e552af7036366ce23178150b0d12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48fc22649f4de0f7e72edf19dfe4f01f47b3e552af7036366ce23178150b0d12", kill_on_drop: false }`
[INFO] [stdout] 48fc22649f4de0f7e72edf19dfe4f01f47b3e552af7036366ce23178150b0d12