[INFO] updating cached repository https://github.com/goby/rust-study
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ed7f2d3593e24c9ea60624d3505ec7f85d7b05b2
[INFO] checking goby/rust-study against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoby%2Frust-study" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/goby/rust-study on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/goby/rust-study
[INFO] finished tweaking git repo https://github.com/goby/rust-study
[INFO] tweaked toml for git repo https://github.com/goby/rust-study written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/goby/rust-study already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /workspace/builds/worker-0/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 70d1f577d9df40ec25cee546213e3ef7523ea5ef40c77d60a55dda4da8da9ad1
[INFO] running `"docker" "start" "-a" "70d1f577d9df40ec25cee546213e3ef7523ea5ef40c77d60a55dda4da8da9ad1"`
[INFO] [stderr]     Checking guessing v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0658]: rust-call ABI is subject to change
[INFO] [stderr]   --> src/closures.rs:22:20
[INFO] [stderr]    |
[INFO] [stderr] 22 |             extern "rust-call" fn call(&self, args: Args) -> Self::Output;
[INFO] [stderr]    |                    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[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:26:20
[INFO] [stderr]    |
[INFO] [stderr] 26 |             extern "rust-call" fn call(&mut self, args: Args) -> Self::Output;
[INFO] [stderr]    |                    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[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:32:20
[INFO] [stderr]    |
[INFO] [stderr] 32 |             extern "rust-call" fn call(self, args: Args) -> Self::Output;
[INFO] [stderr]    |                    ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stderr]    = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/structs.rs:136:38
[INFO] [stderr]     |
[INFO] [stderr] 136 |         let obj = Box::new(g) as Box<Graph<Node=Node, Edge = Edge>>;
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Graph<Node=Node, Edge = Edge>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:75:25
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn dynamic_dispatch(t: &FormatString) {
[INFO] [stderr]    |                         ^^^^^^^^^^^^ help: use `dyn`: `dyn FormatString`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/traits.rs:150:29
[INFO] [stderr]     |
[INFO] [stderr] 150 |     dynamic_dispatch(&x as &FormatString);
[INFO] [stderr]     |                             ^^^^^^^^^^^^ help: use `dyn`: `dyn FormatString`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/traits.rs:151:29
[INFO] [stderr]     |
[INFO] [stderr] 151 |     dynamic_dispatch(&y as &FormatString);
[INFO] [stderr]     |                             ^^^^^^^^^^^^ help: use `dyn`: `dyn FormatString`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/closures.rs:10:49
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn test_return_closure(num: i32) -> Box<Fn(i32) -> i32> {
[INFO] [stderr]    |                                                 ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/closures.rs:49:36
[INFO] [stderr]    |
[INFO] [stderr] 49 |         fn call_with_two(closure: &Fn(i32) -> i32) -> i32 {
[INFO] [stderr]    |                                    ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/macros.rs:115:18
[INFO] [stderr]     |
[INFO] [stderr] 115 |             $($x);*;
[INFO] [stderr]     |                  ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/macros.rs:115:20
[INFO] [stderr]     |
[INFO] [stderr] 115 |             $($x);*;
[INFO] [stderr]     |                    ^ help: remove this semicolon
[INFO] [stderr] ...
[INFO] [stderr] 122 |     m_stmt!(let haha = 3, let _ = 33);
[INFO] [stderr]     |     ---------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/traits.rs:75:25
[INFO] [stderr]    |
[INFO] [stderr] 75 | fn dynamic_dispatch(t: &FormatString) {
[INFO] [stderr]    |                         ^^^^^^^^^^^^ help: use `dyn`: `dyn FormatString`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/macros.rs:115:18
[INFO] [stderr]     |
[INFO] [stderr] 115 |             $($x);*;
[INFO] [stderr]     |                  ^ help: remove this semicolon
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]    --> src/macros.rs:115:20
[INFO] [stderr]     |
[INFO] [stderr] 115 |             $($x);*;
[INFO] [stderr]     |                    ^ help: remove this semicolon
[INFO] [stderr] ...
[INFO] [stderr] 122 |     m_stmt!(let haha = 3, let _ = 33);
[INFO] [stderr]     |     ---------------------------------- in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[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] 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: if this is intentional, prefix it 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: if this is intentional, prefix it 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: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `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 read: `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 read: `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 read: `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 read: `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 read: `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 read: `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:52:6
[INFO] [stderr]    |
[INFO] [stderr] 52 | enum Message {
[INFO] [stderr]    |      ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `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:10:4
[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:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn inverse<T>() -> T
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `static_dispatch`
[INFO] [stderr]   --> src/traits.rs:70:4
[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:75:4
[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:79:4
[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:87:4
[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:113:4
[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:2:4
[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:14:4
[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:35:4
[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:61:4
[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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "70d1f577d9df40ec25cee546213e3ef7523ea5ef40c77d60a55dda4da8da9ad1"`
[INFO] running `"docker" "rm" "-f" "70d1f577d9df40ec25cee546213e3ef7523ea5ef40c77d60a55dda4da8da9ad1"`
[INFO] [stdout] 70d1f577d9df40ec25cee546213e3ef7523ea5ef40c77d60a55dda4da8da9ad1
