[INFO] fetching crate dkb-rs 0.0.1-alpha.2...
[INFO] checking dkb-rs-0.0.1-alpha.2 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate dkb-rs 0.0.1-alpha.2 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate dkb-rs 0.0.1-alpha.2
[INFO] finished tweaking crates.io crate dkb-rs 0.0.1-alpha.2
[INFO] tweaked toml for crates.io crate dkb-rs 0.0.1-alpha.2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dkb-rs 0.0.1-alpha.2 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d81a09b56d439cc998c2411997f0b9d3fa22a80eae88484534ea9d5ec31bcdfc
[INFO] running `Command { std: "docker" "start" "-a" "d81a09b56d439cc998c2411997f0b9d3fa22a80eae88484534ea9d5ec31bcdfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d81a09b56d439cc998c2411997f0b9d3fa22a80eae88484534ea9d5ec31bcdfc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d81a09b56d439cc998c2411997f0b9d3fa22a80eae88484534ea9d5ec31bcdfc", kill_on_drop: false }`
[INFO] [stdout] d81a09b56d439cc998c2411997f0b9d3fa22a80eae88484534ea9d5ec31bcdfc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e6dda4a2b8a48a10a3e6c01c9c4a61db35665954b7445b3ffbc2f46d0ab3fcb2
[INFO] running `Command { std: "docker" "start" "-a" "e6dda4a2b8a48a10a3e6c01c9c4a61db35665954b7445b3ffbc2f46d0ab3fcb2", kill_on_drop: false }`
[INFO] [stderr]     Checking dkb-rs v0.0.1-alpha.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `StringRenderer` is never used
[INFO] [stdout]   --> src/common/mod.rs:48:11
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub trait StringRenderer {}
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/kanakanji/fontx.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct FontXHeader {
[INFO] [stdout]   |        ----------- field in this struct
[INFO] [stdout] 8 |     magic: [u8; 6], // Should be "FONTX2"
[INFO] [stdout] 9 |     name: [u8; 8],  // 8-byte &str
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `FontXHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/kanakanji/fontx.rs:49:22
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn new(rom: &'a [u8]) -> Result<FONTX, InitializationError> {
[INFO] [stdout]    |                      ^^                 ----- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn new(rom: &'a [u8]) -> Result<FONTX<'a>, InitializationError> {
[INFO] [stdout]    |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/latin/fnt.rs:34:22
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn new(rom: &'a [u8], width: usize, height: usize) -> FNT {
[INFO] [stdout]    |                      ^^ this lifetime flows to the output     --- the lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn new(rom: &'a [u8], width: usize, height: usize) -> FNT<'a> {
[INFO] [stdout]    |                                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `StringRenderer` is never used
[INFO] [stdout]   --> src/common/mod.rs:48:11
[INFO] [stdout]    |
[INFO] [stdout] 48 | pub trait StringRenderer {}
[INFO] [stdout]    |           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]  --> src/kanakanji/fontx.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct FontXHeader {
[INFO] [stdout]   |        ----------- field in this struct
[INFO] [stdout] 8 |     magic: [u8; 6], // Should be "FONTX2"
[INFO] [stdout] 9 |     name: [u8; 8],  // 8-byte &str
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `FontXHeader` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/kanakanji/fontx.rs:49:22
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn new(rom: &'a [u8]) -> Result<FONTX, InitializationError> {
[INFO] [stdout]    |                      ^^                 ----- the lifetime gets resolved as `'a`
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn new(rom: &'a [u8]) -> Result<FONTX<'a>, InitializationError> {
[INFO] [stdout]    |                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/latin/fnt.rs:34:22
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn new(rom: &'a [u8], width: usize, height: usize) -> FNT {
[INFO] [stdout]    |                      ^^ this lifetime flows to the output     --- the lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 34 |     pub fn new(rom: &'a [u8], width: usize, height: usize) -> FNT<'a> {
[INFO] [stdout]    |                                                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "e6dda4a2b8a48a10a3e6c01c9c4a61db35665954b7445b3ffbc2f46d0ab3fcb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6dda4a2b8a48a10a3e6c01c9c4a61db35665954b7445b3ffbc2f46d0ab3fcb2", kill_on_drop: false }`
[INFO] [stdout] e6dda4a2b8a48a10a3e6c01c9c4a61db35665954b7445b3ffbc2f46d0ab3fcb2