[INFO] updating cached repository cottonguard/rust-lazy
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cottonguard/rust-lazy
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cottonguard/rust-lazy" "work/ex/beta-1.38-1/sources/1.37.0/gh/cottonguard/rust-lazy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/cottonguard/rust-lazy'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cottonguard/rust-lazy" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cottonguard/rust-lazy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cottonguard/rust-lazy'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 37a1abf985479fb6dc1197b515c4fcf3786ba281
[INFO] sha for GitHub repo cottonguard/rust-lazy: 37a1abf985479fb6dc1197b515c4fcf3786ba281
[INFO] validating manifest of cottonguard/rust-lazy on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cottonguard/rust-lazy on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cottonguard/rust-lazy
[INFO] finished frobbing cottonguard/rust-lazy
[INFO] frobbed toml for cottonguard/rust-lazy written to work/ex/beta-1.38-1/sources/1.37.0/gh/cottonguard/rust-lazy/Cargo.toml
[INFO] started frobbing cottonguard/rust-lazy
[INFO] finished frobbing cottonguard/rust-lazy
[INFO] frobbed toml for cottonguard/rust-lazy written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/cottonguard/rust-lazy/Cargo.toml
[INFO] crate cottonguard/rust-lazy already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cottonguard/rust-lazy against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cottonguard/rust-lazy:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 064f91699dd7eec8e64325137ef2b0758e4e67c4bb0afb47798725671ed28c7c
[INFO] running `"docker" "start" "-a" "064f91699dd7eec8e64325137ef2b0758e4e67c4bb0afb47798725671ed28c7c"`
[INFO] [stderr]    Compiling list v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variant is never constructed: `Thunk`
[INFO] [stderr]  --> src/lazy.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     Thunk(F),
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]  --> src/lazy.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn value(v: T) -> Lazy<fn() -> T, T> {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `thunk`
[INFO] [stderr]   --> src/lazy.rs:15:5
[INFO] [stderr]    |
[INFO] [stderr] 15 |     pub fn thunk(f: F) -> Lazy<F, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_if_forced`
[INFO] [stderr]   --> src/lazy.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn get_if_forced(&self) -> Option<&T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_forced`
[INFO] [stderr]   --> src/lazy.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     pub fn is_forced(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_inner`
[INFO] [stderr]   --> src/lazy.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     pub fn into_inner(mut self) -> T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `thunk`
[INFO] [stderr]   --> src/lazy_cell.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     fn thunk(f: F) -> LazyCell<F, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `into_inner`
[INFO] [stderr]   --> src/lazy_cell.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     fn into_inner(self) -> T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]   --> src/lazy_cell.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn value(v: T) -> LazyCell<fn() -> T, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "064f91699dd7eec8e64325137ef2b0758e4e67c4bb0afb47798725671ed28c7c"`
[INFO] running `"docker" "rm" "-f" "064f91699dd7eec8e64325137ef2b0758e4e67c4bb0afb47798725671ed28c7c"`
[INFO] [stdout] 064f91699dd7eec8e64325137ef2b0758e4e67c4bb0afb47798725671ed28c7c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cottonguard/rust-lazy:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 17a5b7a8e8d5e5e8c4a57bf9a38ceccab732205d155530fed444639cb5e1791b
[INFO] running `"docker" "start" "-a" "17a5b7a8e8d5e5e8c4a57bf9a38ceccab732205d155530fed444639cb5e1791b"`
[INFO] [stderr]    Compiling list v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/lazy.rs:72:17
[INFO] [stderr]    |
[INFO] [stderr] 72 |         let mut v = Lazy::value(234);
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lazy.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |         let mut v = Lazy::value(234);
[INFO] [stderr]    |             ----^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `value`
[INFO] [stderr]   --> src/lazy_cell.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn value(v: T) -> LazyCell<fn() -> T, T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `"docker" "inspect" "17a5b7a8e8d5e5e8c4a57bf9a38ceccab732205d155530fed444639cb5e1791b"`
[INFO] running `"docker" "rm" "-f" "17a5b7a8e8d5e5e8c4a57bf9a38ceccab732205d155530fed444639cb5e1791b"`
[INFO] [stdout] 17a5b7a8e8d5e5e8c4a57bf9a38ceccab732205d155530fed444639cb5e1791b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/cottonguard/rust-lazy:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 6b59528e6380f3df9d76c79b98873a07edf49830101424f792e42727298d12e7
[INFO] running `"docker" "start" "-a" "6b59528e6380f3df9d76c79b98873a07edf49830101424f792e42727298d12e7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/list-fbebd66811f367db
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test lazy::tests::test ... ok
[INFO] [stdout] test lazy_cell::tests::test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/list-fe24e31c7e7169c9
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests list
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6b59528e6380f3df9d76c79b98873a07edf49830101424f792e42727298d12e7"`
[INFO] running `"docker" "rm" "-f" "6b59528e6380f3df9d76c79b98873a07edf49830101424f792e42727298d12e7"`
[INFO] [stdout] 6b59528e6380f3df9d76c79b98873a07edf49830101424f792e42727298d12e7