[INFO] cloning repository https://github.com/Bruce0203/fastvarint
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bruce0203/fastvarint" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBruce0203%2Ffastvarint", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBruce0203%2Ffastvarint'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e473e569aa785cc29ae9bb0807574cf170ee37b
[INFO] checking Bruce0203/fastvarint against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBruce0203%2Ffastvarint" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-4-tc2/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/Bruce0203/fastvarint
[INFO] finished tweaking git repo https://github.com/Bruce0203/fastvarint
[INFO] tweaked toml for git repo https://github.com/Bruce0203/fastvarint written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Bruce0203/fastvarint on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Bruce0203/fastvarint 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.author
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c9fb5689807ac43b839ac06907f6ae8d25b3e7eaa01940a1dad838fdfb4d7bdb
[INFO] running `Command { std: "docker" "start" "-a" "c9fb5689807ac43b839ac06907f6ae8d25b3e7eaa01940a1dad838fdfb4d7bdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c9fb5689807ac43b839ac06907f6ae8d25b3e7eaa01940a1dad838fdfb4d7bdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9fb5689807ac43b839ac06907f6ae8d25b3e7eaa01940a1dad838fdfb4d7bdb", kill_on_drop: false }`
[INFO] [stdout] c9fb5689807ac43b839ac06907f6ae8d25b3e7eaa01940a1dad838fdfb4d7bdb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 954a1640d39002c031bc3558bbc4db88b71454c90afe6094115ac293dc42b8ce
[INFO] running `Command { std: "docker" "start" "-a" "954a1640d39002c031bc3558bbc4db88b71454c90afe6094115ac293dc42b8ce", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: package.author
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]    Compiling syn v2.0.76
[INFO] [stderr]    Compiling derive_more-impl v1.0.0
[INFO] [stderr]     Checking nonmax v0.5.5
[INFO] [stderr]     Checking derive_more v1.0.0
[INFO] [stderr]     Checking fastvarint v0.22.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `convert::Infallible`, `marker::PhantomData`, and `usize`
[INFO] [stdout]  --> src/serde.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{convert::Infallible, marker::PhantomData, usize};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Unexpected` and `Visitor`
[INFO] [stdout]  --> src/serde.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use serde::de::{Unexpected, Visitor};
[INFO] [stdout]   |                 ^^^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DecodeVarIntError` and `DecodeVarInt`
[INFO] [stdout]  --> src/serde.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::{DecodeVarInt, DecodeVarIntError, EncodeVarInt};
[INFO] [stdout]   |             ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<u8>, Infallible>
[INFO] [stdout]   --> src/tests.rs:17:91
[INFO] [stdout]    |
[INFO] [stdout] 17 |       let result: Result<(T, usize), DecodeVarIntError<Infallible>> = T::decode_var_int(|_| {
[INFO] [stdout]    |  ___________________________________________________________________________________________^
[INFO] [stdout] 18 | |         if i < bytes.len() {
[INFO] [stdout] 19 | |             let byte = bytes[i];
[INFO] [stdout] 20 | |             i += 1;
[INFO] [stdout] ...  |
[INFO] [stdout] 25 | |     });
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<u8>, Infallible>
[INFO] [stdout]   --> src/tests.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 | /         if i < bytes.len() {
[INFO] [stdout] 19 | |             let byte = bytes[i];
[INFO] [stdout] 20 | |             i += 1;
[INFO] [stdout] 21 | |             Ok(Some(byte))
[INFO] [stdout] 22 | |         } else {
[INFO] [stdout] 23 | |             Ok(None)
[INFO] [stdout] 24 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<u8>, Infallible>
[INFO] [stdout]   --> src/tests.rs:18:28
[INFO] [stdout]    |
[INFO] [stdout] 18 |           if i < bytes.len() {
[INFO] [stdout]    |  ____________________________^
[INFO] [stdout] 19 | |             let byte = bytes[i];
[INFO] [stdout] 20 | |             i += 1;
[INFO] [stdout] 21 | |             Ok(Some(byte))
[INFO] [stdout] 22 | |         } else {
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<u8>, Infallible>
[INFO] [stdout]   --> src/tests.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |             Ok(Some(byte))
[INFO] [stdout]    |             ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<u8>, Infallible>
[INFO] [stdout]   --> src/tests.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |           } else {
[INFO] [stdout]    |  ________________^
[INFO] [stdout] 23 | |             Ok(None)
[INFO] [stdout] 24 | |         }
[INFO] [stdout]    | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::option::Option<u8>, Infallible>
[INFO] [stdout]   --> src/tests.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |             Ok(None)
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fastvarint` (lib test) due to 6 previous errors; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused imports: `convert::Infallible`, `marker::PhantomData`, and `usize`
[INFO] [stdout]  --> src/serde.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{convert::Infallible, marker::PhantomData, usize};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Unexpected` and `Visitor`
[INFO] [stdout]  --> src/serde.rs:3:17
[INFO] [stdout]   |
[INFO] [stdout] 3 | use serde::de::{Unexpected, Visitor};
[INFO] [stdout]   |                 ^^^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DecodeVarIntError` and `DecodeVarInt`
[INFO] [stdout]  --> src/serde.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::{DecodeVarInt, DecodeVarIntError, EncodeVarInt};
[INFO] [stdout]   |             ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "954a1640d39002c031bc3558bbc4db88b71454c90afe6094115ac293dc42b8ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "954a1640d39002c031bc3558bbc4db88b71454c90afe6094115ac293dc42b8ce", kill_on_drop: false }`
[INFO] [stdout] 954a1640d39002c031bc3558bbc4db88b71454c90afe6094115ac293dc42b8ce
