[INFO] updating cached repository https://github.com/nikomatsakis/grep-test
[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] dd835f864fa4231c082dedde197d4ed87ed0d070
[INFO] checking nikomatsakis/grep-test against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikomatsakis%2Fgrep-test" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nikomatsakis/grep-test 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/nikomatsakis/grep-test
[INFO] finished tweaking git repo https://github.com/nikomatsakis/grep-test
[INFO] tweaked toml for git repo https://github.com/nikomatsakis/grep-test written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/nikomatsakis/grep-test already has a lockfile, it will not be regenerated
[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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] a76903015b6a537b1b53c9f3859eef409461eaf9de9aa0e0ac17a9dbdd0b5a6b
[INFO] running `"docker" "start" "-a" "a76903015b6a537b1b53c9f3859eef409461eaf9de9aa0e0ac17a9dbdd0b5a6b"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking backtrace v0.3.5
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking grep-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: expected identifier, found keyword `extern`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use extern::{
[INFO] [stderr]    |     ^^^^^^ expected identifier, found keyword
[INFO] [stderr]    |
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]    |
[INFO] [stderr] 11 | use r#extern::{
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/main.rs:1:55
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(crate_in_paths, crate_visibility_modifier, extern_in_paths, decl_macro,
[INFO] [stderr]   |                                                       ^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stderr]   |
[INFO] [stderr]   = note: subsumed by `::foo::bar` paths
[INFO] [stderr] 
[INFO] [stderr] error: expected identifier, found keyword `extern`
[INFO] [stderr]  --> src/file_read.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use extern::std::{fs::File, io::{self, BufRead, BufReader}, path::Path};
[INFO] [stderr]   |     ^^^^^^ expected identifier, found keyword
[INFO] [stderr]   |
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]   |
[INFO] [stderr] 1 | use r#extern::std::{fs::File, io::{self, BufRead, BufReader}, path::Path};
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: expected identifier, found keyword `extern`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use extern::{
[INFO] [stderr]    |     ^^^^^^ expected identifier, found keyword
[INFO] [stderr]    |
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]    |
[INFO] [stderr] 11 | use r#extern::{
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0557]: feature has been removed
[INFO] [stderr]  --> src/main.rs:1:55
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(crate_in_paths, crate_visibility_modifier, extern_in_paths, decl_macro,
[INFO] [stderr]   |                                                       ^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stderr]   |
[INFO] [stderr]   = note: subsumed by `::foo::bar` paths
[INFO] [stderr] 
[INFO] [stderr] error: expected identifier, found keyword `extern`
[INFO] [stderr]  --> src/file_read.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use extern::std::{fs::File, io::{self, BufRead, BufReader}, path::Path};
[INFO] [stderr]   |     ^^^^^^ expected identifier, found keyword
[INFO] [stderr]   |
[INFO] [stderr] help: you can escape reserved keywords to use them as identifiers
[INFO] [stderr]   |
[INFO] [stderr] 1 | use r#extern::std::{fs::File, io::{self, BufRead, BufReader}, path::Path};
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: maybe a missing crate `r#extern`?
[INFO] [stderr]  --> src/file_read.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use extern::std::{fs::File, io::{self, BufRead, BufReader}, path::Path};
[INFO] [stderr]   |     ^^^^^^ maybe a missing crate `r#extern`?
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: maybe a missing crate `r#extern`?
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use extern::{
[INFO] [stderr]    |     ^^^^^^ maybe a missing crate `r#extern`?
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: maybe a missing crate `r#extern`?
[INFO] [stderr]  --> src/file_read.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use extern::std::{fs::File, io::{self, BufRead, BufReader}, path::Path};
[INFO] [stderr]   |     ^^^^^^ maybe a missing crate `r#extern`?
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: maybe a missing crate `r#extern`?
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use extern::{
[INFO] [stderr]    |     ^^^^^^ maybe a missing crate `r#extern`?
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `io`
[INFO] [stderr]  --> src/file_read.rs:5:39
[INFO] [stderr]   |
[INFO] [stderr] 5 |     mut callback: impl FnMut(&str) -> io::Result<()>,
[INFO] [stderr]   |                                       ^^ use of undeclared type or module `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `io`
[INFO] [stderr]  --> src/file_read.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | ) -> io::Result<()> {
[INFO] [stderr]   |      ^^ use of undeclared type or module `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `File`
[INFO] [stderr]  --> src/file_read.rs:7:16
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let file = File::open(path)?;
[INFO] [stderr]   |                ^^^^ use of undeclared type or module `File`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `BufReader`
[INFO] [stderr]  --> src/file_read.rs:8:18
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let reader = BufReader::new(&file);
[INFO] [stderr]   |                  ^^^^^^^^^ use of undeclared type or module `BufReader`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `io`
[INFO] [stderr]   --> src/main.rs:18:14
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn main() -> io::Result<()> {
[INFO] [stderr]    |              ^^ use of undeclared type or module `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `env`
[INFO] [stderr]   --> src/main.rs:19:20
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut args = env::args().skip(1);
[INFO] [stderr]    |                    ^^^ use of undeclared type or module `env`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `process`
[INFO] [stderr]   --> src/main.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |             process::exit(1);
[INFO] [stderr]    |             ^^^^^^^ use of undeclared type or module `process`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Regex`
[INFO] [stderr]   --> src/main.rs:29:22
[INFO] [stderr]    |
[INFO] [stderr] 29 |         Some(arg) => Regex::new(&arg).expect("invalid regex"),
[INFO] [stderr]    |                      ^^^^^ use of undeclared type or module `Regex`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `io`
[INFO] [stderr]   --> src/main.rs:32:18
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let stdout = io::stdout();
[INFO] [stderr]    |                  ^^ use of undeclared type or module `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Path` in this scope
[INFO] [stderr]  --> src/file_read.rs:4:22
[INFO] [stderr]   |
[INFO] [stderr] 4 |     path: impl AsRef<Path>,
[INFO] [stderr]   |                      ^^^^ not found in this scope
[INFO] [stderr]   |
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::path::Path;
[INFO] [stderr]   |
[INFO] [stderr] help: you might be missing a type parameter
[INFO] [stderr]   |
[INFO] [stderr] 3 | crate fn for_each_line<Path>(
[INFO] [stderr]   |                       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 15 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0433, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `io`
[INFO] [stderr]  --> src/file_read.rs:5:39
[INFO] [stderr]   |
[INFO] [stderr] 5 |     mut callback: impl FnMut(&str) -> io::Result<()>,
[INFO] [stderr]   |                                       ^^ use of undeclared type or module `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `io`
[INFO] [stderr]  --> src/file_read.rs:6:6
[INFO] [stderr]   |
[INFO] [stderr] 6 | ) -> io::Result<()> {
[INFO] [stderr]   |      ^^ use of undeclared type or module `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `File`
[INFO] [stderr]  --> src/file_read.rs:7:16
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let file = File::open(path)?;
[INFO] [stderr]   |                ^^^^ use of undeclared type or module `File`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `BufReader`
[INFO] [stderr]  --> src/file_read.rs:8:18
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let reader = BufReader::new(&file);
[INFO] [stderr]   |                  ^^^^^^^^^ use of undeclared type or module `BufReader`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `io`
[INFO] [stderr]   --> src/main.rs:18:14
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn main() -> io::Result<()> {
[INFO] [stderr]    |              ^^ use of undeclared type or module `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `env`
[INFO] [stderr]   --> src/main.rs:19:20
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut args = env::args().skip(1);
[INFO] [stderr]    |                    ^^^ use of undeclared type or module `env`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `process`
[INFO] [stderr]   --> src/main.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |             process::exit(1);
[INFO] [stderr]    |             ^^^^^^^ use of undeclared type or module `process`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Regex`
[INFO] [stderr]   --> src/main.rs:29:22
[INFO] [stderr]    |
[INFO] [stderr] 29 |         Some(arg) => Regex::new(&arg).expect("invalid regex"),
[INFO] [stderr]    |                      ^^^^^ use of undeclared type or module `Regex`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `io`
[INFO] [stderr]   --> src/main.rs:32:18
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let stdout = io::stdout();
[INFO] [stderr]    |                  ^^ use of undeclared type or module `io`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Path` in this scope
[INFO] [stderr]  --> src/file_read.rs:4:22
[INFO] [stderr]   |
[INFO] [stderr] 4 |     path: impl AsRef<Path>,
[INFO] [stderr]   |                      ^^^^ not found in this scope
[INFO] [stderr]   |
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::path::Path;
[INFO] [stderr]   |
[INFO] [stderr] help: you might be missing a type parameter
[INFO] [stderr]   |
[INFO] [stderr] 3 | crate fn for_each_line<Path>(
[INFO] [stderr]   |                       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `grep-test`.
[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: aborting due to 15 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0412, E0433, E0557.
[INFO] [stderr] For more information about an error, try `rustc --explain E0412`.
[INFO] [stderr] error: could not compile `grep-test`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "a76903015b6a537b1b53c9f3859eef409461eaf9de9aa0e0ac17a9dbdd0b5a6b"`
[INFO] running `"docker" "rm" "-f" "a76903015b6a537b1b53c9f3859eef409461eaf9de9aa0e0ac17a9dbdd0b5a6b"`
[INFO] [stdout] a76903015b6a537b1b53c9f3859eef409461eaf9de9aa0e0ac17a9dbdd0b5a6b
