[INFO] cloning repository https://github.com/zacklukem/vimib
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zacklukem/vimib" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzacklukem%2Fvimib", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzacklukem%2Fvimib'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6569bb197258bbf0edafdc74bfeceaa4cf4fb158
[INFO] checking zacklukem/vimib against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzacklukem%2Fvimib" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zacklukem/vimib 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 git repo https://github.com/zacklukem/vimib
[INFO] finished tweaking git repo https://github.com/zacklukem/vimib
[INFO] tweaked toml for git repo https://github.com/zacklukem/vimib written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zacklukem/vimib 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a657a250b74bfbb82d0c1671e417cfe2c0a4ebaee445f98b638fa261d81d8c0
[INFO] running `Command { std: "docker" "start" "-a" "0a657a250b74bfbb82d0c1671e417cfe2c0a4ebaee445f98b638fa261d81d8c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a657a250b74bfbb82d0c1671e417cfe2c0a4ebaee445f98b638fa261d81d8c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a657a250b74bfbb82d0c1671e417cfe2c0a4ebaee445f98b638fa261d81d8c0", kill_on_drop: false }`
[INFO] [stdout] 0a657a250b74bfbb82d0c1671e417cfe2c0a4ebaee445f98b638fa261d81d8c0
[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=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] 36a1207606199752e88df047a88c97d20c3e2b3c47af9268953463c7743cc32b
[INFO] running `Command { std: "docker" "start" "-a" "36a1207606199752e88df047a88c97d20c3e2b3c47af9268953463c7743cc32b", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking libparser v0.1.0 (/opt/rustwide/workdir/src/libparser)
[INFO] [stdout] warning: the item `TokenKind` is imported redundantly
[INFO] [stdout]  --> src/libparser/src/parser/expression.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TokenKind` is already imported here
[INFO] [stdout] 2 | use crate::ast::*;
[INFO] [stdout] 3 | use crate::lexer::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TokenKind` is imported redundantly
[INFO] [stdout]  --> src/libparser/src/parser/statement.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TokenKind` is already imported here
[INFO] [stdout] 2 | use crate::ast::*;
[INFO] [stdout] 3 | use crate::lexer::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TokenKind` is imported redundantly
[INFO] [stdout]  --> src/libparser/src/parser/expression.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TokenKind` is already imported here
[INFO] [stdout] 2 | use crate::ast::*;
[INFO] [stdout] 3 | use crate::lexer::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TokenKind` is imported redundantly
[INFO] [stdout]  --> src/libparser/src/parser/statement.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TokenKind` is already imported here
[INFO] [stdout] 2 | use crate::ast::*;
[INFO] [stdout] 3 | use crate::lexer::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking libvm v0.1.0 (/opt/rustwide/workdir/src/libvm)
[INFO] [stderr]     Checking libcodegen v0.1.0 (/opt/rustwide/workdir/src/libcodegen)
[INFO] [stderr]     Checking vimib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `Command { std: "docker" "inspect" "36a1207606199752e88df047a88c97d20c3e2b3c47af9268953463c7743cc32b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36a1207606199752e88df047a88c97d20c3e2b3c47af9268953463c7743cc32b", kill_on_drop: false }`
[INFO] [stdout] 36a1207606199752e88df047a88c97d20c3e2b3c47af9268953463c7743cc32b
[INFO] checking zacklukem/vimib against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzacklukem%2Fvimib" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zacklukem/vimib on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zacklukem/vimib
[INFO] finished tweaking git repo https://github.com/zacklukem/vimib
[INFO] tweaked toml for git repo https://github.com/zacklukem/vimib written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/zacklukem/vimib 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 121ecad5b4fee712b572847bb9ca80a9e3912ad8b5094409dadd79c139edd3a2
[INFO] running `Command { std: "docker" "start" "-a" "121ecad5b4fee712b572847bb9ca80a9e3912ad8b5094409dadd79c139edd3a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "121ecad5b4fee712b572847bb9ca80a9e3912ad8b5094409dadd79c139edd3a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "121ecad5b4fee712b572847bb9ca80a9e3912ad8b5094409dadd79c139edd3a2", kill_on_drop: false }`
[INFO] [stdout] 121ecad5b4fee712b572847bb9ca80a9e3912ad8b5094409dadd79c139edd3a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d3a6ecf2f756243d0b9bbb54ff927f9c35006e2da444e60e46c67e683f6952c
[INFO] running `Command { std: "docker" "start" "-a" "6d3a6ecf2f756243d0b9bbb54ff927f9c35006e2da444e60e46c67e683f6952c", kill_on_drop: false }`
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking libparser v0.1.0 (/opt/rustwide/workdir/src/libparser)
[INFO] [stdout] warning: the item `TokenKind` is imported redundantly
[INFO] [stdout]  --> src/libparser/src/parser/expression.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TokenKind` is already imported here
[INFO] [stdout] 2 | use crate::ast::*;
[INFO] [stdout] 3 | use crate::lexer::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TokenKind` is imported redundantly
[INFO] [stdout]  --> src/libparser/src/parser/statement.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TokenKind` is already imported here
[INFO] [stdout] 2 | use crate::ast::*;
[INFO] [stdout] 3 | use crate::lexer::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TokenKind` is imported redundantly
[INFO] [stdout]  --> src/libparser/src/parser/expression.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TokenKind` is already imported here
[INFO] [stdout] 2 | use crate::ast::*;
[INFO] [stdout] 3 | use crate::lexer::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TokenKind` is imported redundantly
[INFO] [stdout]  --> src/libparser/src/parser/statement.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::*;
[INFO] [stdout]   |     -------- the item `TokenKind` is already imported here
[INFO] [stdout] 2 | use crate::ast::*;
[INFO] [stdout] 3 | use crate::lexer::TokenKind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking libvm v0.1.0 (/opt/rustwide/workdir/src/libvm)
[INFO] [stderr]     Checking libcodegen v0.1.0 (/opt/rustwide/workdir/src/libcodegen)
[INFO] [stderr]     Checking vimib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "6d3a6ecf2f756243d0b9bbb54ff927f9c35006e2da444e60e46c67e683f6952c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d3a6ecf2f756243d0b9bbb54ff927f9c35006e2da444e60e46c67e683f6952c", kill_on_drop: false }`
[INFO] [stdout] 6d3a6ecf2f756243d0b9bbb54ff927f9c35006e2da444e60e46c67e683f6952c