[INFO] fetching crate xous 0.9.55...
[INFO] checking xous-0.9.55 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate xous 0.9.55 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate xous 0.9.55 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 xous 0.9.55
[INFO] finished tweaking crates.io crate xous 0.9.55
[INFO] tweaked toml for crates.io crate xous 0.9.55 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] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 4 packages
[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 rustc-std-workspace-core v1.0.0
[INFO] [stderr]   Downloaded compiler_builtins v0.1.108
[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] 2e7257c1a17d3107cfcf1357aec4cf6a10b464d8f4d36b8e0ad68488518a940c
[INFO] running `Command { std: "docker" "start" "-a" "2e7257c1a17d3107cfcf1357aec4cf6a10b464d8f4d36b8e0ad68488518a940c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2e7257c1a17d3107cfcf1357aec4cf6a10b464d8f4d36b8e0ad68488518a940c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e7257c1a17d3107cfcf1357aec4cf6a10b464d8f4d36b8e0ad68488518a940c", kill_on_drop: false }`
[INFO] [stdout] 2e7257c1a17d3107cfcf1357aec4cf6a10b464d8f4d36b8e0ad68488518a940c
[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] 665efd9967793bf6b6695c9d80a62d8024256a65af4011a8a0a23c584fb08735
[INFO] running `Command { std: "docker" "start" "-a" "665efd9967793bf6b6695c9d80a62d8024256a65af4011a8a0a23c584fb08735", kill_on_drop: false }`
[INFO] [stderr]     Checking xous v0.9.55 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/arch/hosted/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private item shadows public glob re-export
[INFO] [stdout]   --> src/arch/hosted/mod.rs:8:45
[INFO] [stdout]    |
[INFO] [stdout] 8  | use crate::{Result, SysCall, SysCallResult, PID, TID};
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the name `PID` in the type namespace is supposed to be publicly re-exported here
[INFO] [stdout]   --> src/arch/hosted/mod.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub use process::*;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] note: but the private item here shadows it
[INFO] [stdout]   --> src/arch/hosted/mod.rs:8:45
[INFO] [stdout]    |
[INFO] [stdout] 8  | use crate::{Result, SysCall, SysCallResult, PID, TID};
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    = note: `#[warn(hidden_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `PID` is imported redundantly
[INFO] [stdout]   --> src/arch/hosted/mod.rs:8:45
[INFO] [stdout]    |
[INFO] [stdout] 8  | use crate::{Result, SysCall, SysCallResult, PID, TID};
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 | pub use process::*;
[INFO] [stdout]    |         ---------- the item `PID` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::PID`
[INFO] [stdout]  --> src/arch/hosted/process.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use crate::PID;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/arch/hosted/process.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                     ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/arch/hosted/process.rs:3:30
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                              ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/definitions.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/definitions/messages/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/syscall.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                     ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/syscall.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                              ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/arch/hosted/mod.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: private item shadows public glob re-export
[INFO] [stdout]   --> src/arch/hosted/mod.rs:8:45
[INFO] [stdout]    |
[INFO] [stdout] 8  | use crate::{Result, SysCall, SysCallResult, PID, TID};
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the name `PID` in the type namespace is supposed to be publicly re-exported here
[INFO] [stdout]   --> src/arch/hosted/mod.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub use process::*;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout] note: but the private item here shadows it
[INFO] [stdout]   --> src/arch/hosted/mod.rs:8:45
[INFO] [stdout]    |
[INFO] [stdout] 8  | use crate::{Result, SysCall, SysCallResult, PID, TID};
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    = note: `#[warn(hidden_glob_reexports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `PID` is imported redundantly
[INFO] [stdout]   --> src/arch/hosted/mod.rs:8:45
[INFO] [stdout]    |
[INFO] [stdout] 8  | use crate::{Result, SysCall, SysCallResult, PID, TID};
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 | pub use process::*;
[INFO] [stdout]    |         ---------- the item `PID` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::PID`
[INFO] [stdout]  --> src/arch/hosted/process.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub use crate::PID;
[INFO] [stdout]   |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/arch/hosted/process.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                     ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/arch/hosted/process.rs:3:30
[INFO] [stdout]   |
[INFO] [stdout] 3 | use core::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                              ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/definitions.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::convert::TryInto;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/definitions/messages/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/syscall.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                     ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryInto` is imported redundantly
[INFO] [stdout]  --> src/syscall.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core::convert::{TryFrom, TryInto};
[INFO] [stdout]   |                              ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryInto` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "665efd9967793bf6b6695c9d80a62d8024256a65af4011a8a0a23c584fb08735", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "665efd9967793bf6b6695c9d80a62d8024256a65af4011a8a0a23c584fb08735", kill_on_drop: false }`
[INFO] [stdout] 665efd9967793bf6b6695c9d80a62d8024256a65af4011a8a0a23c584fb08735