[INFO] fetching crate flashcards 0.1.1...
[INFO] checking flashcards-0.1.1 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate flashcards 0.1.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate flashcards 0.1.1 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flashcards 0.1.1
[INFO] finished tweaking crates.io crate flashcards 0.1.1
[INFO] tweaked toml for crates.io crate flashcards 0.1.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate flashcards 0.1.1 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded xattr v0.2.2
[INFO] [stderr]   Downloaded filetime v0.2.15
[INFO] [stderr]   Downloaded tar v0.4.38
[INFO] [stderr]   Downloaded fs_extra v1.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3b189f171c522a1ee90fe7340e90472ca10518ed4e06981a871d5954fd888efc
[INFO] running `Command { std: "docker" "start" "-a" "3b189f171c522a1ee90fe7340e90472ca10518ed4e06981a871d5954fd888efc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3b189f171c522a1ee90fe7340e90472ca10518ed4e06981a871d5954fd888efc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b189f171c522a1ee90fe7340e90472ca10518ed4e06981a871d5954fd888efc", kill_on_drop: false }`
[INFO] [stdout] 3b189f171c522a1ee90fe7340e90472ca10518ed4e06981a871d5954fd888efc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10410dc8d657e961248959a48a71dfd605bc238959c112ee8c1246d73b84dd2c
[INFO] running `Command { std: "docker" "start" "-a" "10410dc8d657e961248959a48a71dfd605bc238959c112ee8c1246d73b84dd2c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking fs_extra v1.2.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking xattr v0.2.2
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking filetime v0.2.15
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking tar v0.4.38
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking flashcards v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `close_fds`, `id`, and `name` are never used
[INFO] [stdout]    --> src/lib.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 22  | impl Deck {
[INFO] [stdout]     | --------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn close_fds(&self) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 130 |     fn id(&self) -> &str {
[INFO] [stdout]     |        ^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     fn name(&self) -> &str {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `open`, `close`, and `is_opened` are never used
[INFO] [stdout]    --> src/lib.rs:163:5
[INFO] [stdout]     |
[INFO] [stdout] 159 | impl FileDesc {
[INFO] [stdout]     | ------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 163 |     fn new(path: impl AsRef<Path>, rc: u32) -> Result<Self> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 180 |     fn open(&mut self, storage_path: impl AsRef<Path>) -> Result<()> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 195 |     fn close(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |     fn is_opened(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `close_fds`, `id`, and `name` are never used
[INFO] [stdout]    --> src/lib.rs:124:5
[INFO] [stdout]     |
[INFO] [stdout] 22  | impl Deck {
[INFO] [stdout]     | --------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 124 |     fn close_fds(&self) {
[INFO] [stdout]     |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 130 |     fn id(&self) -> &str {
[INFO] [stdout]     |        ^^
[INFO] [stdout] ...
[INFO] [stdout] 134 |     fn name(&self) -> &str {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `open`, `close`, and `is_opened` are never used
[INFO] [stdout]    --> src/lib.rs:163:5
[INFO] [stdout]     |
[INFO] [stdout] 159 | impl FileDesc {
[INFO] [stdout]     | ------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 163 |     fn new(path: impl AsRef<Path>, rc: u32) -> Result<Self> {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 180 |     fn open(&mut self, storage_path: impl AsRef<Path>) -> Result<()> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 195 |     fn close(&mut self) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 223 |     fn is_opened(&self) -> bool {
[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]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.25s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: fs_extra v1.2.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "10410dc8d657e961248959a48a71dfd605bc238959c112ee8c1246d73b84dd2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10410dc8d657e961248959a48a71dfd605bc238959c112ee8c1246d73b84dd2c", kill_on_drop: false }`
[INFO] [stdout] 10410dc8d657e961248959a48a71dfd605bc238959c112ee8c1246d73b84dd2c