[INFO] cloning repository https://github.com/modernserf/gremlin_rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/modernserf/gremlin_rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodernserf%2Fgremlin_rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodernserf%2Fgremlin_rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 843b25b658fe6e7a92a4012cc41599b13a8f8247
[INFO] checking modernserf/gremlin_rs against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodernserf%2Fgremlin_rs" "/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/modernserf/gremlin_rs 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/modernserf/gremlin_rs
[INFO] finished tweaking git repo https://github.com/modernserf/gremlin_rs
[INFO] tweaked toml for git repo https://github.com/modernserf/gremlin_rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/modernserf/gremlin_rs 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-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 026b19b5d575da9cfbd9f7baf181dde448cd85d6b86d104d9ed87c4f3080fd3c
[INFO] running `Command { std: "docker" "start" "-a" "026b19b5d575da9cfbd9f7baf181dde448cd85d6b86d104d9ed87c4f3080fd3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "026b19b5d575da9cfbd9f7baf181dde448cd85d6b86d104d9ed87c4f3080fd3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "026b19b5d575da9cfbd9f7baf181dde448cd85d6b86d104d9ed87c4f3080fd3c", kill_on_drop: false }`
[INFO] [stdout] 026b19b5d575da9cfbd9f7baf181dde448cd85d6b86d104d9ed87c4f3080fd3c
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f9e6e234b5ed726115e7375b4d89012e9af3f44a78f05471eda96ca7f2aeba7
[INFO] running `Command { std: "docker" "start" "-a" "0f9e6e234b5ed726115e7375b4d89012e9af3f44a78f05471eda96ca7f2aeba7", kill_on_drop: false }`
[INFO] [stderr]     Checking gremlin_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `HashMap` is imported redundantly
[INFO] [stdout]    --> src/expr.rs:663:9
[INFO] [stdout]     |
[INFO] [stdout] 660 |     use super::*;
[INFO] [stdout]     |         -------- the item `HashMap` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 663 |     use std::collections::HashMap;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IR` is imported redundantly
[INFO] [stdout]     --> src/memory2.rs:1333:47
[INFO] [stdout]      |
[INFO] [stdout] 1332 |     use super::{Data::*, *};
[INFO] [stdout]      |                          - the item `IR` is already imported here
[INFO] [stdout] 1333 |     use crate::runtime::{Register::SP, EA::*, IR, IR::*};
[INFO] [stdout]      |                                               ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.44s
[INFO] running `Command { std: "docker" "inspect" "0f9e6e234b5ed726115e7375b4d89012e9af3f44a78f05471eda96ca7f2aeba7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f9e6e234b5ed726115e7375b4d89012e9af3f44a78f05471eda96ca7f2aeba7", kill_on_drop: false }`
[INFO] [stdout] 0f9e6e234b5ed726115e7375b4d89012e9af3f44a78f05471eda96ca7f2aeba7
[INFO] checking modernserf/gremlin_rs against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodernserf%2Fgremlin_rs" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/modernserf/gremlin_rs 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/modernserf/gremlin_rs
[INFO] finished tweaking git repo https://github.com/modernserf/gremlin_rs
[INFO] tweaked toml for git repo https://github.com/modernserf/gremlin_rs written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/modernserf/gremlin_rs 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 2151651b46ab3d8a8fca9b1a2270ed9e8d43486b3162d62b4f830d943c14af4c
[INFO] running `Command { std: "docker" "start" "-a" "2151651b46ab3d8a8fca9b1a2270ed9e8d43486b3162d62b4f830d943c14af4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2151651b46ab3d8a8fca9b1a2270ed9e8d43486b3162d62b4f830d943c14af4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2151651b46ab3d8a8fca9b1a2270ed9e8d43486b3162d62b4f830d943c14af4c", kill_on_drop: false }`
[INFO] [stdout] 2151651b46ab3d8a8fca9b1a2270ed9e8d43486b3162d62b4f830d943c14af4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a02fe096e9a0b341a63fe120ae2e264d524877e4fa12dc600d585ae2c674e398
[INFO] running `Command { std: "docker" "start" "-a" "a02fe096e9a0b341a63fe120ae2e264d524877e4fa12dc600d585ae2c674e398", kill_on_drop: false }`
[INFO] [stderr]     Checking gremlin_rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `HashMap` is imported redundantly
[INFO] [stdout]    --> src/expr.rs:663:9
[INFO] [stdout]     |
[INFO] [stdout] 660 |     use super::*;
[INFO] [stdout]     |         -------- the item `HashMap` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 663 |     use std::collections::HashMap;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IR` is imported redundantly
[INFO] [stdout]     --> src/memory2.rs:1333:47
[INFO] [stdout]      |
[INFO] [stdout] 1332 |     use super::{Data::*, *};
[INFO] [stdout]      |                          - the item `IR` is already imported here
[INFO] [stdout] 1333 |     use crate::runtime::{Register::SP, EA::*, IR, IR::*};
[INFO] [stdout]      |                                               ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "a02fe096e9a0b341a63fe120ae2e264d524877e4fa12dc600d585ae2c674e398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a02fe096e9a0b341a63fe120ae2e264d524877e4fa12dc600d585ae2c674e398", kill_on_drop: false }`
[INFO] [stdout] a02fe096e9a0b341a63fe120ae2e264d524877e4fa12dc600d585ae2c674e398