[INFO] cloning repository https://github.com/dhoepelman/rust-pong [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dhoepelman/rust-pong" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdhoepelman%2Frust-pong", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdhoepelman%2Frust-pong'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] c137445cb4b13ef72b217eb3bb5075ee9e1d1ecc [INFO] checking dhoepelman/rust-pong against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdhoepelman%2Frust-pong" "/workspace/builds/worker-9/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/dhoepelman/rust-pong on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/dhoepelman/rust-pong [INFO] finished tweaking git repo https://github.com/dhoepelman/rust-pong [INFO] tweaked toml for git repo https://github.com/dhoepelman/rust-pong written to /workspace/builds/worker-9/source/Cargo.toml [INFO] crate git repo https://github.com/dhoepelman/rust-pong already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded gmp-mpfr-sys v1.1.10 [INFO] [stderr] Downloaded rug v0.6.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f09ca2f9b238b4446f32cb14d5b544b9053b78ca3b1ed3d336ff6ee42e1e1f3c [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "f09ca2f9b238b4446f32cb14d5b544b9053b78ca3b1ed3d336ff6ee42e1e1f3c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f09ca2f9b238b4446f32cb14d5b544b9053b78ca3b1ed3d336ff6ee42e1e1f3c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f09ca2f9b238b4446f32cb14d5b544b9053b78ca3b1ed3d336ff6ee42e1e1f3c", kill_on_drop: false }` [INFO] [stdout] f09ca2f9b238b4446f32cb14d5b544b9053b78ca3b1ed3d336ff6ee42e1e1f3c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 26f1dcbe1925dd1090315990a940381e5278c0ce99ae31aa0c0338079ce24920 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "26f1dcbe1925dd1090315990a940381e5278c0ce99ae31aa0c0338079ce24920", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.48 [INFO] [stderr] Compiling gmp-mpfr-sys v1.1.10 [INFO] [stderr] Compiling rug v0.6.0 [INFO] [stderr] Checking rand v0.4.6 [INFO] [stderr] Checking pong v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rand::Rng` [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use rand::Rng; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::cmp::Ordering` [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::cmp::Ordering; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Assign` [INFO] [stdout] --> src/main.rs:6:11 [INFO] [stdout] | [INFO] [stdout] 6 | use rug::{Assign, Integer}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*cache` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/main.rs:57:22 [INFO] [stdout] | [INFO] [stdout] 50 | fn fib(n: usize, cache: &mut Vec) -> &Integer { [INFO] [stdout] | - let's call the lifetime of this reference `'1` [INFO] [stdout] 51 | match cache.get(n) { [INFO] [stdout] | ----- immutable borrow occurs here [INFO] [stdout] 52 | Some(n) => n, [INFO] [stdout] | - returning this value requires that `*cache` is borrowed for `'1` [INFO] [stdout] ... [INFO] [stdout] 57 | m => fib(m-2, cache).clone() + fib(m - 1, cache).clone() [INFO] [stdout] | ^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*cache` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/main.rs:57:48 [INFO] [stdout] | [INFO] [stdout] 50 | fn fib(n: usize, cache: &mut Vec) -> &Integer { [INFO] [stdout] | - let's call the lifetime of this reference `'1` [INFO] [stdout] 51 | match cache.get(n) { [INFO] [stdout] | ----- immutable borrow occurs here [INFO] [stdout] 52 | Some(n) => n, [INFO] [stdout] | - returning this value requires that `*cache` is borrowed for `'1` [INFO] [stdout] ... [INFO] [stdout] 57 | m => fib(m-2, cache).clone() + fib(m - 1, cache).clone() [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*cache` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/main.rs:59:13 [INFO] [stdout] | [INFO] [stdout] 50 | fn fib(n: usize, cache: &mut Vec) -> &Integer { [INFO] [stdout] | - let's call the lifetime of this reference `'1` [INFO] [stdout] 51 | match cache.get(n) { [INFO] [stdout] | ----- immutable borrow occurs here [INFO] [stdout] 52 | Some(n) => n, [INFO] [stdout] | - returning this value requires that `*cache` is borrowed for `'1` [INFO] [stdout] ... [INFO] [stdout] 59 | cache.push(res); [INFO] [stdout] | ^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0515]: cannot return reference to temporary value [INFO] [stdout] --> src/main.rs:60:20 [INFO] [stdout] | [INFO] [stdout] 60 | return &cache[n].clone(); [INFO] [stdout] | ^---------------- [INFO] [stdout] | || [INFO] [stdout] | |temporary value created here [INFO] [stdout] | returns a reference to data owned by the current function [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 4 previous errors; 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0502, E0515. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0502`. [INFO] [stdout] [INFO] [stderr] error: could not compile `pong` [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] [stdout] warning: unused import: `std::io` [INFO] [stdout] --> src/main.rs:3:5 [INFO] [stdout] | [INFO] [stdout] 3 | use std::io; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `rand::Rng` [INFO] [stdout] --> src/main.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use rand::Rng; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::cmp::Ordering` [INFO] [stdout] --> src/main.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::cmp::Ordering; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Assign` [INFO] [stdout] --> src/main.rs:6:11 [INFO] [stdout] | [INFO] [stdout] 6 | use rug::{Assign, Integer}; [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*cache` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/main.rs:57:22 [INFO] [stdout] | [INFO] [stdout] 50 | fn fib(n: usize, cache: &mut Vec) -> &Integer { [INFO] [stdout] | - let's call the lifetime of this reference `'1` [INFO] [stdout] 51 | match cache.get(n) { [INFO] [stdout] | ----- immutable borrow occurs here [INFO] [stdout] 52 | Some(n) => n, [INFO] [stdout] | - returning this value requires that `*cache` is borrowed for `'1` [INFO] [stdout] ... [INFO] [stdout] 57 | m => fib(m-2, cache).clone() + fib(m - 1, cache).clone() [INFO] [stdout] | ^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*cache` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/main.rs:57:48 [INFO] [stdout] | [INFO] [stdout] 50 | fn fib(n: usize, cache: &mut Vec) -> &Integer { [INFO] [stdout] | - let's call the lifetime of this reference `'1` [INFO] [stdout] 51 | match cache.get(n) { [INFO] [stdout] | ----- immutable borrow occurs here [INFO] [stdout] 52 | Some(n) => n, [INFO] [stdout] | - returning this value requires that `*cache` is borrowed for `'1` [INFO] [stdout] ... [INFO] [stdout] 57 | m => fib(m-2, cache).clone() + fib(m - 1, cache).clone() [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0502]: cannot borrow `*cache` as mutable because it is also borrowed as immutable [INFO] [stdout] --> src/main.rs:59:13 [INFO] [stdout] | [INFO] [stdout] 50 | fn fib(n: usize, cache: &mut Vec) -> &Integer { [INFO] [stdout] | - let's call the lifetime of this reference `'1` [INFO] [stdout] 51 | match cache.get(n) { [INFO] [stdout] | ----- immutable borrow occurs here [INFO] [stdout] 52 | Some(n) => n, [INFO] [stdout] | - returning this value requires that `*cache` is borrowed for `'1` [INFO] [stdout] ... [INFO] [stdout] 59 | cache.push(res); [INFO] [stdout] | ^^^^^^^^^^^^^^^ mutable borrow occurs here [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0515]: cannot return reference to temporary value [INFO] [stdout] --> src/main.rs:60:20 [INFO] [stdout] | [INFO] [stdout] 60 | return &cache[n].clone(); [INFO] [stdout] | ^---------------- [INFO] [stdout] | || [INFO] [stdout] | |temporary value created here [INFO] [stdout] | returns a reference to data owned by the current function [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 4 previous errors; 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0502, E0515. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0502`. [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "26f1dcbe1925dd1090315990a940381e5278c0ce99ae31aa0c0338079ce24920", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "26f1dcbe1925dd1090315990a940381e5278c0ce99ae31aa0c0338079ce24920", kill_on_drop: false }` [INFO] [stdout] 26f1dcbe1925dd1090315990a940381e5278c0ce99ae31aa0c0338079ce24920