[INFO] updating cached repository goby/rust-study
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/goby/rust-study
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/goby/rust-study" "work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/goby/rust-study"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/goby/rust-study'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/goby/rust-study" "work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/goby/rust-study"`
[INFO] [stderr] Cloning into 'work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/goby/rust-study'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ed7f2d3593e24c9ea60624d3505ec7f85d7b05b2
[INFO] sha for GitHub repo goby/rust-study: ed7f2d3593e24c9ea60624d3505ec7f85d7b05b2
[INFO] validating manifest of goby/rust-study on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of goby/rust-study on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing goby/rust-study
[INFO] finished frobbing goby/rust-study
[INFO] frobbed toml for goby/rust-study written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/goby/rust-study/Cargo.toml
[INFO] started frobbing goby/rust-study
[INFO] finished frobbing goby/rust-study
[INFO] frobbed toml for goby/rust-study written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/gh/goby/rust-study/Cargo.toml
[INFO] crate goby/rust-study already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/goby/rust-study/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking goby/rust-study against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-3/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/gh/goby/rust-study:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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=forbid" "-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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2c9c8171491c0cfcf60d09b2b4a92963d5d49cb24f4df79325a2af272262853e
[INFO] running `"docker" "start" "-a" "2c9c8171491c0cfcf60d09b2b4a92963d5d49cb24f4df79325a2af272262853e"`
[INFO] [stderr]     Checking guessing v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Debug`
[INFO] [stderr]  --> src/structs.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt::{Debug,Display};
[INFO] [stderr]   |                ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/concurrency.rs:2:1
[INFO] [stderr]    |
[INFO] [stderr] 2  | / macro_rules! concurrency {
[INFO] [stderr] 3  | |     ($start: expr, $end: expr, |$x: ident| -> $dd: block) => {
[INFO] [stderr] 4  | |         let handlers: Vec<_> = ($start..$end).map(|$x| {
[INFO] [stderr] 5  | |             thread::spawn(move || {
[INFO] [stderr] ...  |
[INFO] [stderr] 14 | |     }
[INFO] [stderr] 15 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: rust-call ABI is subject to change
[INFO] [stderr]   --> src/closures.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |             extern "rust-call" fn call(&self, args: Args) -> Self::Output;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
[INFO] [stderr]    = help: add #![feature(unboxed_closures)] to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: rust-call ABI is subject to change
[INFO] [stderr]   --> src/closures.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |             extern "rust-call" fn call(&mut self, args: Args) -> Self::Output;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
[INFO] [stderr]    = help: add #![feature(unboxed_closures)] to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: rust-call ABI is subject to change
[INFO] [stderr]   --> src/closures.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |             extern "rust-call" fn call(self, args: Args) -> Self::Output;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: for more information, see https://github.com/rust-lang/rust/issues/29625
[INFO] [stderr]    = help: add #![feature(unboxed_closures)] to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Debug`
[INFO] [stderr]  --> src/structs.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt::{Debug,Display};
[INFO] [stderr]   |                ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n1`
[INFO] [stderr]   --> src/structs.rs:86:24
[INFO] [stderr]    |
[INFO] [stderr] 86 |     fn has_edge(&self, n1: &Node, n2: &Node) -> bool {
[INFO] [stderr]    |                        ^^ help: consider prefixing with an underscore: `_n1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n2`
[INFO] [stderr]   --> src/structs.rs:86:35
[INFO] [stderr]    |
[INFO] [stderr] 86 |     fn has_edge(&self, n1: &Node, n2: &Node) -> bool {
[INFO] [stderr]    |                                   ^^ help: consider prefixing with an underscore: `_n2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `node`
[INFO] [stderr]   --> src/structs.rs:90:21
[INFO] [stderr]    |
[INFO] [stderr] 90 |     fn edges(&self, node: &Node) -> Vec<Edge> {
[INFO] [stderr]    |                     ^^^^ help: consider prefixing with an underscore: `_node`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `x`
[INFO] [stderr]   --> src/structs.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     x: &'a mut i32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `y`
[INFO] [stderr]   --> src/structs.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     y: &'a mut i32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `start`
[INFO] [stderr]   --> src/structs.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     start: Point<T>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `end`
[INFO] [stderr]   --> src/structs.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     end: Point<T>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `x`
[INFO] [stderr]   --> src/structs.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     x: &'a mut i32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `y`
[INFO] [stderr]   --> src/structs.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     y: &'a mut i32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `z`
[INFO] [stderr]   --> src/structs.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     z: &'a mut i32,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Message`
[INFO] [stderr]   --> src/structs.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | enum Message {
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `centor`
[INFO] [stderr]    --> src/structs.rs:100:5
[INFO] [stderr]     |
[INFO] [stderr] 100 |     centor: Point<T>,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]    --> src/structs.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 |     fn area(&self) -> f64 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `grow`
[INFO] [stderr]    --> src/structs.rs:116:5
[INFO] [stderr]     |
[INFO] [stderr] 116 |     fn grow(&self, increment: f64) -> Circle {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `normal`
[INFO] [stderr]   --> src/traits.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn normal<T: ConvertTo<i64>>(x: &T) -> i64 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `inverse`
[INFO] [stderr]   --> src/traits.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | / fn inverse<T>() -> T
[INFO] [stderr] 15 | |         where i32: ConvertTo<T> {
[INFO] [stderr] 16 | |     42.convert()    
[INFO] [stderr] 17 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `UseDefault`
[INFO] [stderr]   --> src/traits.rs:28:1
[INFO] [stderr]    |
[INFO] [stderr] 28 | struct UseDefault;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `OverrideDefault`
[INFO] [stderr]   --> src/traits.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct OverrideDefault;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `HasDrop`
[INFO] [stderr]   --> src/traits.rs:46:1
[INFO] [stderr]    |
[INFO] [stderr] 46 | struct HasDrop {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `static_dispatch`
[INFO] [stderr]   --> src/traits.rs:70:1
[INFO] [stderr]    |
[INFO] [stderr] 70 | fn static_dispatch<T: FormatString>(t: &T) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dynamic_dispatch`
[INFO] [stderr]   --> src/traits.rs:75:1
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn dynamic_dispatch(t: &FormatString) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `object_safe`
[INFO] [stderr]   --> src/traits.rs:79:1
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn object_safe() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `trait_with_same_function`
[INFO] [stderr]   --> src/traits.rs:87:1
[INFO] [stderr]    |
[INFO] [stderr] 87 | fn trait_with_same_function() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `trait_with_as_form`
[INFO] [stderr]    --> src/traits.rs:113:1
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn trait_with_as_form() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_move`
[INFO] [stderr]  --> src/lifetimes.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | fn test_move() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_ownership`
[INFO] [stderr]   --> src/lifetimes.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn test_ownership() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_lifetime`
[INFO] [stderr]   --> src/lifetimes.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn test_lifetime() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_elided_lifetime`
[INFO] [stderr]   --> src/lifetimes.rs:61:1
[INFO] [stderr]    |
[INFO] [stderr] 61 | fn test_elided_lifetime() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: Could not compile `guessing`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "2c9c8171491c0cfcf60d09b2b4a92963d5d49cb24f4df79325a2af272262853e"`
[INFO] running `"docker" "rm" "-f" "2c9c8171491c0cfcf60d09b2b4a92963d5d49cb24f4df79325a2af272262853e"`
[INFO] [stdout] 2c9c8171491c0cfcf60d09b2b4a92963d5d49cb24f4df79325a2af272262853e