[INFO] fetching crate runner 0.5.0...
[INFO] checking runner-0.5.0 against master#f609b7e0586f81fefb3523e3e17adf779ac416be for pr-129466-2
[INFO] extracting crate runner 0.5.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate runner 0.5.0 on toolchain f609b7e0586f81fefb3523e3e17adf779ac416be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate runner 0.5.0
[INFO] finished tweaking crates.io crate runner 0.5.0
[INFO] tweaked toml for crates.io crate runner 0.5.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate runner 0.5.0 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" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded open v1.2.1
[INFO] [stderr]   Downloaded serde_derive v1.0.66
[INFO] [stderr]   Downloaded constant_time_eq v0.1.3
[INFO] [stderr]   Downloaded cfg-if v0.1.7
[INFO] [stderr]   Downloaded rustc-demangle v0.1.14
[INFO] [stderr]   Downloaded redox_users v0.3.0
[INFO] [stderr]   Downloaded easy-shortcuts v0.3.0
[INFO] [stderr]   Downloaded syn v0.14.2
[INFO] [stderr]   Downloaded backtrace v0.3.15
[INFO] [stderr]   Downloaded toml v0.4.6
[INFO] [stderr]   Downloaded serde v1.0.66
[INFO] [stderr]   Downloaded redox_syscall v0.1.40
[INFO] [stderr]   Downloaded syn v0.15.34
[INFO] [stderr]   Downloaded synstructure v0.10.1
[INFO] [stderr]   Downloaded lapp v0.4.0
[INFO] [stderr]   Downloaded argon2rs v0.2.5
[INFO] [stderr]   Downloaded libc v0.2.54
[INFO] [stderr]   Downloaded backtrace-sys v0.1.28
[INFO] [stderr]   Downloaded winapi v0.3.4
[INFO] [stderr]   Downloaded isatty v0.1.8
[INFO] [stderr]   Downloaded json v0.11.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5cd94a462924b5248241bce4713c7f0a639f2eb128ef1795b4b0a27c3a19f227
[INFO] running `Command { std: "docker" "start" "-a" "5cd94a462924b5248241bce4713c7f0a639f2eb128ef1795b4b0a27c3a19f227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5cd94a462924b5248241bce4713c7f0a639f2eb128ef1795b4b0a27c3a19f227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cd94a462924b5248241bce4713c7f0a639f2eb128ef1795b4b0a27c3a19f227", kill_on_drop: false }`
[INFO] [stdout] 5cd94a462924b5248241bce4713c7f0a639f2eb128ef1795b4b0a27c3a19f227
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+f609b7e0586f81fefb3523e3e17adf779ac416be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ecd833a895639e83417a68d1a46bf62ef0bededdee19e77c8a6bdbbec7d8841
[INFO] running `Command { std: "docker" "start" "-a" "5ecd833a895639e83417a68d1a46bf62ef0bededdee19e77c8a6bdbbec7d8841", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.54
[INFO] [stderr]    Compiling serde v1.0.66
[INFO] [stderr]     Checking semver-parser v0.7.0
[INFO] [stderr]     Checking shlex v0.1.1
[INFO] [stderr]     Checking easy-shortcuts v0.3.0
[INFO] [stderr]     Checking open v1.2.1
[INFO] [stderr]     Checking lapp v0.4.0
[INFO] [stderr]     Checking json v0.11.12
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]     Checking semver v0.9.0
[INFO] [stderr]     Checking isatty v0.1.8
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]    Compiling serde_derive v1.0.66
[INFO] [stderr]     Checking toml v0.4.6
[INFO] [stderr]     Checking runner v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected item, found keyword `let`
[INFO] [stdout]  --> examples/regex.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | let re = Regex::new(r"^\d{4}-\d{2}-\d{2}$").unwrap();
[INFO] [stdout]   | ^^^ consider using `const` or `static` instead of `let` for global variables
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected item, found keyword `let`
[INFO] [stdout]  --> examples/filetime.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | let metadata = fs::metadata("filetime.rs").unwrap();
[INFO] [stdout]   | ^^^ consider using `const` or `static` instead of `let` for global variables
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected item, found keyword `let`
[INFO] [stdout]  --> examples/read.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | let code = fs::read_to_string("read.rs")?;
[INFO] [stdout]   | ^^^ consider using `const` or `static` instead of `let` for global variables
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runner` (example "regex") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `runner` (example "filetime") due to 2 previous errors
[INFO] [stderr] error: could not compile `runner` (example "read") due to 2 previous errors
[INFO] [stdout] error: macro expansion ignores token `{` and any following
[INFO] [stdout]  --> /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/macros.rs:142:23
[INFO] [stdout]   |
[INFO] [stdout]  ::: examples/hello.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | println!("hello, world!");
[INFO] [stdout]   | ------------------------- caused by the macro expansion here
[INFO] [stdout]   |
[INFO] [stdout]   = note: the usage of `println!` is likely invalid in item context
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: macro expansion ignores token `{` and any following
[INFO] [stdout]  --> /rustc/f609b7e0586f81fefb3523e3e17adf779ac416be/library/std/src/macros.rs:142:23
[INFO] [stdout]   |
[INFO] [stdout]  ::: examples/json.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | / println!("{}",
[INFO] [stdout] 5 | |     json! ({
[INFO] [stdout] 6 | |         "hello": 42,
[INFO] [stdout] 7 | |     })
[INFO] [stdout] 8 | | );
[INFO] [stdout]   | |_- caused by the macro expansion here
[INFO] [stdout]   |
[INFO] [stdout]   = note: the usage of `println!` is likely invalid in item context
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `hello`
[INFO] [stdout]  --> examples/hello.rs:1:27
[INFO] [stdout]   |
[INFO] [stdout] 1 | println!("hello, world!");
[INFO] [stdout]   |                           ^ consider adding a `main` function to `examples/hello.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `serde_json`
[INFO] [stdout]  --> examples/json.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use serde_json::json;
[INFO] [stdout]   |     ^^^^^^^^^^ use of undeclared crate or module `serde_json`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `json`
[INFO] [stdout]  --> examples/json.rs:8:3
[INFO] [stdout]   |
[INFO] [stdout] 8 | );
[INFO] [stdout]   |   ^ consider adding a `main` function to `examples/json.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0601.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `runner` (example "hello") due to 3 previous errors
[INFO] [stderr] error: could not compile `runner` (example "json") due to 4 previous errors
[INFO] [stdout] warning: field `source` is never read
[INFO] [stdout]   --> src/cargo_lock.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Package {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub source: Option<String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `source` is never read
[INFO] [stdout]   --> src/cargo_lock.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct Package {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 15 |     pub source: Option<String>,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5ecd833a895639e83417a68d1a46bf62ef0bededdee19e77c8a6bdbbec7d8841", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ecd833a895639e83417a68d1a46bf62ef0bededdee19e77c8a6bdbbec7d8841", kill_on_drop: false }`
[INFO] [stdout] 5ecd833a895639e83417a68d1a46bf62ef0bededdee19e77c8a6bdbbec7d8841