[INFO] fetching crate recurse 0.3.0...
[INFO] checking recurse-0.3.0 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate recurse 0.3.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate recurse 0.3.0 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate recurse 0.3.0
[INFO] finished tweaking crates.io crate recurse 0.3.0
[INFO] tweaked toml for crates.io crate recurse 0.3.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate recurse 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 933c632f28b10319ce480a2437d65cd84abd88c24f52193f6c8bb64bf915a398
[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" "933c632f28b10319ce480a2437d65cd84abd88c24f52193f6c8bb64bf915a398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "933c632f28b10319ce480a2437d65cd84abd88c24f52193f6c8bb64bf915a398", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "933c632f28b10319ce480a2437d65cd84abd88c24f52193f6c8bb64bf915a398", kill_on_drop: false }`
[INFO] [stdout] 933c632f28b10319ce480a2437d65cd84abd88c24f52193f6c8bb64bf915a398
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 770c8b8adcd1962ea1d160eaab1f8f0c7c5b2170978f0e24660868af2cf1c25a
[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" "770c8b8adcd1962ea1d160eaab1f8f0c7c5b2170978f0e24660868af2cf1c25a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling syn v1.0.22
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking float-cmp v0.6.0
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking predicates v1.0.4
[INFO] [stderr]     Checking assert_cmd v1.0.1
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking recurse v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `OpenOptions`, `read_to_string`
[INFO] [stdout]  --> src/command/replace.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::{read_to_string, OpenOptions};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufWriter`, `ErrorKind`
[INFO] [stdout]  --> src/command/replace.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{BufWriter, ErrorKind, Write};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow`
[INFO] [stdout]  --> src/command/replace.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | use anyhow::{anyhow, Result};
[INFO] [stdout]   |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `regex::Regex`
[INFO] [stdout]  --> src/command/replace.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use regex::Regex;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ops::io::walk`
[INFO] [stdout]  --> src/command/replace.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::ops::io::walk;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `path_has_extension`, `path_is_hidden`
[INFO] [stdout]   --> src/command/replace.rs:10:24
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::ops::path::{path_has_extension, path_is_hidden};
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `OpenOptions`, `read_to_string`
[INFO] [stdout]  --> src/command/replace.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fs::{read_to_string, OpenOptions};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufWriter`, `ErrorKind`
[INFO] [stdout]  --> src/command/replace.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{BufWriter, ErrorKind, Write};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `anyhow`
[INFO] [stdout]  --> src/command/replace.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | use anyhow::{anyhow, Result};
[INFO] [stdout]   |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `regex::Regex`
[INFO] [stdout]  --> src/command/replace.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use regex::Regex;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::ops::io::walk`
[INFO] [stdout]  --> src/command/replace.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crate::ops::io::walk;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `path_has_extension`, `path_is_hidden`
[INFO] [stdout]   --> src/command/replace.rs:10:24
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crate::ops::path::{path_has_extension, path_is_hidden};
[INFO] [stdout]    |                        ^^^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subcmd`
[INFO] [stdout]   --> src/command/replace.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn execute(subcmd: Recurse, mut writer: impl Write) -> Result<()> {
[INFO] [stdout]    |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_subcmd`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/command/replace.rs:18:33
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn execute(subcmd: Recurse, mut writer: impl Write) -> Result<()> {
[INFO] [stdout]    |                                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/command/replace.rs:18:33
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn execute(subcmd: Recurse, mut writer: impl Write) -> Result<()> {
[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] warning: constant is never used: `BACKUP_FILEPATH_EXTENSION`
[INFO] [stdout]   --> src/command/replace.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | const BACKUP_FILEPATH_EXTENSION: &str = "bu";
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `get_backup_filepath`
[INFO] [stdout]    --> src/command/replace.rs:139:4
[INFO] [stdout]     |
[INFO] [stdout] 139 | fn get_backup_filepath(inpath: &Path) -> PathBuf {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `has_backup_extension`
[INFO] [stdout]    --> src/command/replace.rs:151:4
[INFO] [stdout]     |
[INFO] [stdout] 151 | fn has_backup_extension(inpath: &Path) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_root_filepath`
[INFO] [stdout]    --> src/command/replace.rs:158:4
[INFO] [stdout]     |
[INFO] [stdout] 158 | fn is_root_filepath(inpath: &Path) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subcmd`
[INFO] [stdout]   --> src/command/replace.rs:18:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn execute(subcmd: Recurse, mut writer: impl Write) -> Result<()> {
[INFO] [stdout]    |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_subcmd`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writer`
[INFO] [stdout]   --> src/command/replace.rs:18:33
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn execute(subcmd: Recurse, mut writer: impl Write) -> Result<()> {
[INFO] [stdout]    |                                 ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_writer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/command/replace.rs:18:33
[INFO] [stdout]    |
[INFO] [stdout] 18 |     fn execute(subcmd: Recurse, mut writer: impl Write) -> Result<()> {
[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] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.86s
[INFO] running `Command { std: "docker" "inspect" "770c8b8adcd1962ea1d160eaab1f8f0c7c5b2170978f0e24660868af2cf1c25a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "770c8b8adcd1962ea1d160eaab1f8f0c7c5b2170978f0e24660868af2cf1c25a", kill_on_drop: false }`
[INFO] [stdout] 770c8b8adcd1962ea1d160eaab1f8f0c7c5b2170978f0e24660868af2cf1c25a
