[INFO] cloning repository https://github.com/younger027/rust-exec [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/younger027/rust-exec" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyounger027%2Frust-exec", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyounger027%2Frust-exec'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 62753e7d679f0c6ad7874b9276cd70bf7e5dcb6e [INFO] checking younger027/rust-exec against try#35b6491ce6d2b388d0a5de1e59e2123604af807f for pr-136539 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyounger027%2Frust-exec" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/younger027/rust-exec on toolchain 35b6491ce6d2b388d0a5de1e59e2123604af807f [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/younger027/rust-exec [INFO] finished tweaking git repo https://github.com/younger027/rust-exec [INFO] tweaked toml for git repo https://github.com/younger027/rust-exec written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/younger027/rust-exec 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" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [ERROR] error running command: no output for 300 seconds [INFO] checking younger027/rust-exec against try#35b6491ce6d2b388d0a5de1e59e2123604af807f for pr-136539 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyounger027%2Frust-exec" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/younger027/rust-exec on toolchain 35b6491ce6d2b388d0a5de1e59e2123604af807f [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/younger027/rust-exec [INFO] finished tweaking git repo https://github.com/younger027/rust-exec [INFO] tweaked toml for git repo https://github.com/younger027/rust-exec written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/younger027/rust-exec 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" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] e1206fbd43b1ed72e757686bc29ac8e8730006a18707ab1751e15e173baaca89 [INFO] running `Command { std: "docker" "start" "-a" "e1206fbd43b1ed72e757686bc29ac8e8730006a18707ab1751e15e173baaca89", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "e1206fbd43b1ed72e757686bc29ac8e8730006a18707ab1751e15e173baaca89", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "e1206fbd43b1ed72e757686bc29ac8e8730006a18707ab1751e15e173baaca89", kill_on_drop: false }` [INFO] [stdout] e1206fbd43b1ed72e757686bc29ac8e8730006a18707ab1751e15e173baaca89 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+35b6491ce6d2b388d0a5de1e59e2123604af807f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3a588a77b5a269763820bdee0f957f6cf4e2237dae73d4ed4c2c8676dec53785 [INFO] running `Command { std: "docker" "start" "-a" "3a588a77b5a269763820bdee0f957f6cf4e2237dae73d4ed4c2c8676dec53785", kill_on_drop: false }` [INFO] [stderr] Checking young v0.1.0 (/opt/rustwide/workdir/young) [INFO] [stdout] error[E0106]: missing lifetime specifier [INFO] [stdout] --> young/src/lib.rs:140:33 [INFO] [stdout] | [INFO] [stdout] 140 | fn return_string_reference() -> &String { [INFO] [stdout] | ^ expected named lifetime parameter [INFO] [stdout] | [INFO] [stdout] = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from [INFO] [stdout] help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static` [INFO] [stdout] | [INFO] [stdout] 140 | fn return_string_reference() -> &'static String { [INFO] [stdout] | +++++++ [INFO] [stdout] help: instead, you are more likely to want to return an owned value [INFO] [stdout] | [INFO] [stdout] 140 - fn return_string_reference() -> &String { [INFO] [stdout] 140 + fn return_string_reference() -> String { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0106]: missing lifetime specifier [INFO] [stdout] --> young/src/lib.rs:140:33 [INFO] [stdout] | [INFO] [stdout] 140 | fn return_string_reference() -> &String { [INFO] [stdout] | ^ expected named lifetime parameter [INFO] [stdout] | [INFO] [stdout] = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from [INFO] [stdout] help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static` [INFO] [stdout] | [INFO] [stdout] 140 | fn return_string_reference() -> &'static String { [INFO] [stdout] | +++++++ [INFO] [stdout] help: instead, you are more likely to want to return an owned value [INFO] [stdout] | [INFO] [stdout] 140 - fn return_string_reference() -> &String { [INFO] [stdout] 140 + fn return_string_reference() -> String { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> young/src/lib.rs:86:13 [INFO] [stdout] | [INFO] [stdout] 86 | let mut s = String::from("hello"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> young/src/lib.rs:98:13 [INFO] [stdout] | [INFO] [stdout] 98 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> young/src/lib.rs:101:9 [INFO] [stdout] | [INFO] [stdout] 101 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> young/src/lib.rs:86:9 [INFO] [stdout] | [INFO] [stdout] 86 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0515]: cannot return reference to local variable `s` [INFO] [stdout] --> young/src/lib.rs:142:5 [INFO] [stdout] | [INFO] [stdout] 142 | &s //return string not return reference of string [INFO] [stdout] | ^^ returns a reference to data owned by the current function [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0106, E0515. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0106`. [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s` [INFO] [stdout] --> young/src/lib.rs:86:13 [INFO] [stdout] | [INFO] [stdout] 86 | let mut s = String::from("hello"); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_s` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> young/src/lib.rs:98:13 [INFO] [stdout] | [INFO] [stdout] 98 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> young/src/lib.rs:101:9 [INFO] [stdout] | [INFO] [stdout] 101 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> young/src/lib.rs:86:9 [INFO] [stdout] | [INFO] [stdout] 86 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0515]: cannot return reference to local variable `s` [INFO] [stdout] --> young/src/lib.rs:142:5 [INFO] [stdout] | [INFO] [stdout] 142 | &s //return string not return reference of string [INFO] [stdout] | ^^ returns a reference to data owned by the current function [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `young` (lib) due to 2 previous errors; 4 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] Some errors have detailed explanations: E0106, E0515. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0106`. [INFO] [stdout] [INFO] [stderr] error: could not compile `young` (lib test) due to 2 previous errors; 4 warnings emitted [INFO] running `Command { std: "docker" "inspect" "3a588a77b5a269763820bdee0f957f6cf4e2237dae73d4ed4c2c8676dec53785", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3a588a77b5a269763820bdee0f957f6cf4e2237dae73d4ed4c2c8676dec53785", kill_on_drop: false }` [INFO] [stdout] 3a588a77b5a269763820bdee0f957f6cf4e2237dae73d4ed4c2c8676dec53785