[INFO] cloning repository https://github.com/tbfleming/rust-windows-experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tbfleming/rust-windows-experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftbfleming%2Frust-windows-experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftbfleming%2Frust-windows-experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 36e7c890d7b9dcfb75a34118f63ae3a3b80c91d8
[INFO] checking tbfleming/rust-windows-experiments against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftbfleming%2Frust-windows-experiments" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tbfleming/rust-windows-experiments on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tbfleming/rust-windows-experiments
[INFO] finished tweaking git repo https://github.com/tbfleming/rust-windows-experiments
[INFO] tweaked toml for git repo https://github.com/tbfleming/rust-windows-experiments written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tbfleming/rust-windows-experiments 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded closure_attr_derive v0.3.0
[INFO] [stderr]   Downloaded closure_attr_core v0.3.0
[INFO] [stderr]   Downloaded closure_attr v0.3.0
[INFO] [stderr]   Downloaded syn v2.0.31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ff98e6656de3058aee746ccae9d74c9004c7a88ca184e8623bce6c281ac6491
[INFO] running `Command { std: "docker" "start" "-a" "4ff98e6656de3058aee746ccae9d74c9004c7a88ca184e8623bce6c281ac6491", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ff98e6656de3058aee746ccae9d74c9004c7a88ca184e8623bce6c281ac6491", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ff98e6656de3058aee746ccae9d74c9004c7a88ca184e8623bce6c281ac6491", kill_on_drop: false }`
[INFO] [stdout] 4ff98e6656de3058aee746ccae9d74c9004c7a88ca184e8623bce6c281ac6491
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a9c4aca580d4685f9651b1e0d312de636f4457c8044492b56260a344289a0bb
[INFO] running `Command { std: "docker" "start" "-a" "1a9c4aca580d4685f9651b1e0d312de636f4457c8044492b56260a344289a0bb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling windows_x86_64_gnu v0.48.5
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]     Checking unicode-ident v1.0.11
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling serde_json v1.0.105
[INFO] [stderr]    Compiling thiserror v1.0.47
[INFO] [stderr]     Checking bytemuck v1.13.1
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking fdeflate v0.3.0
[INFO] [stderr]     Checking windows-targets v0.48.5
[INFO] [stderr]     Checking windows-core v0.51.1
[INFO] [stderr]     Checking flate2 v1.0.27
[INFO] [stderr]     Checking quote v1.0.33
[INFO] [stderr]     Checking syn v2.0.31
[INFO] [stderr]     Checking windows v0.51.1
[INFO] [stderr]     Checking png v0.17.10
[INFO] [stderr]    Compiling closure_attr_core v0.3.0
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling closure_attr_derive v0.3.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.47
[INFO] [stderr]     Checking closure_attr v0.3.0
[INFO] [stderr]     Checking codexform v0.1.0 (/opt/rustwide/workdir/codexform)
[INFO] [stderr]     Checking trywin v0.1.0 (/opt/rustwide/workdir/trywin)
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> trywin/src/comm_ctrl.rs:4:48
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{cell::RefCell, mem::size_of, rc::Rc, result::Result};
[INFO] [stdout]   |                                                ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]   --> trywin/src/comm_ctrl.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 | use object_wrappers::{Error, *};
[INFO] [stdout]    |                       ^^^^^  - the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Result` is imported redundantly
[INFO] [stdout]  --> trywin/src/comm_ctrl.rs:4:48
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::{cell::RefCell, mem::size_of, rc::Rc, result::Result};
[INFO] [stdout]   |                                                ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Result` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Error` is imported redundantly
[INFO] [stdout]   --> trywin/src/comm_ctrl.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 | use object_wrappers::{Error, *};
[INFO] [stdout]    |                       ^^^^^  - the item `Error` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> trywin/src/comm_ctrl/object_wrappers.rs:211:42
[INFO] [stdout]     |
[INFO] [stdout] 211 |     pub struct BorrowedGdiobj<'a, Owner>(&'a Owner, HGDIOBJ);
[INFO] [stdout]     |                --------------            ^^^^^^^^^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 211 |     pub struct BorrowedGdiobj<'a, Owner>((), HGDIOBJ);
[INFO] [stdout]     |                                          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> trywin/src/comm_ctrl/object_wrappers.rs:211:42
[INFO] [stdout]     |
[INFO] [stdout] 211 |     pub struct BorrowedGdiobj<'a, Owner>(&'a Owner, HGDIOBJ);
[INFO] [stdout]     |                --------------            ^^^^^^^^^
[INFO] [stdout]     |                |
[INFO] [stdout]     |                field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 211 |     pub struct BorrowedGdiobj<'a, Owner>((), HGDIOBJ);
[INFO] [stdout]     |                                          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.50s
[INFO] running `Command { std: "docker" "inspect" "1a9c4aca580d4685f9651b1e0d312de636f4457c8044492b56260a344289a0bb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a9c4aca580d4685f9651b1e0d312de636f4457c8044492b56260a344289a0bb", kill_on_drop: false }`
[INFO] [stdout] 1a9c4aca580d4685f9651b1e0d312de636f4457c8044492b56260a344289a0bb