[INFO] fetching crate impromptu 0.0.1...
[INFO] checking impromptu-0.0.1 against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] extracting crate impromptu 0.0.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate impromptu 0.0.1 on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate impromptu 0.0.1
[INFO] finished tweaking crates.io crate impromptu 0.0.1
[INFO] tweaked toml for crates.io crate impromptu 0.0.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate impromptu 0.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cached v0.9.0
[INFO] running `Command { std: "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" "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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37f276de5dd90effbff64c5a7908e153dd18b65ac9c971b746062637e79448c4
[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" "37f276de5dd90effbff64c5a7908e153dd18b65ac9c971b746062637e79448c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37f276de5dd90effbff64c5a7908e153dd18b65ac9c971b746062637e79448c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37f276de5dd90effbff64c5a7908e153dd18b65ac9c971b746062637e79448c4", kill_on_drop: false }`
[INFO] [stdout] 37f276de5dd90effbff64c5a7908e153dd18b65ac9c971b746062637e79448c4
[INFO] running `Command { std: "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" "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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d84cb5e7ae3750d2961bef0b2c5420bde6ec6332a8bbfdacfdb5c6a0b568440
[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" "2d84cb5e7ae3750d2961bef0b2c5420bde6ec6332a8bbfdacfdb5c6a0b568440", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling ryu v1.0.0
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling bitflags v1.2.0
[INFO] [stderr]    Compiling rayon-core v1.6.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stderr]     Checking ansi_term v0.11.0
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[INFO] [stderr]    Compiling rustc_version v0.2.3
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[INFO] [stderr]     Checking csv-core v0.1.6
[INFO] [stderr]     Checking aho-corasick v0.7.6
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[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]    Compiling openssl-sys v0.9.50
[INFO] [stderr]    Compiling libssh2-sys v0.2.12
[INFO] [stderr]    Compiling libgit2-sys v0.9.1
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking once_cell v0.1.8
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[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking csv v1.1.1
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[INFO] [stderr]     Checking git2 v0.10.1
[INFO] [stderr]     Checking criterion v0.3.0
[INFO] [stderr]     Checking impromptu v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `style::Style::*`
[INFO] [stdout]  --> src/main-colors.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use style::Style::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `style::Style::*`
[INFO] [stdout]  --> src/main-colors.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use style::Style::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bold`
[INFO] [stdout]   --> src/style.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     Bold,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Faint`
[INFO] [stdout]   --> src/style.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Faint,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Italic`
[INFO] [stdout]   --> src/style.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Italic,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Underline`
[INFO] [stdout]   --> src/style.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Underline,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Blink`
[INFO] [stdout]   --> src/style.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     Blink,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Invert`
[INFO] [stdout]   --> src/style.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     Invert,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CrossedOut`
[INFO] [stdout]   --> src/style.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     CrossedOut,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Framed`
[INFO] [stdout]   --> src/style.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Framed,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `styled`
[INFO] [stdout]    --> src/style.rs:235:8
[INFO] [stdout]     |
[INFO] [stdout] 235 | pub fn styled<T: std::fmt::Display>(arg: T, style: Style) -> String {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Bold`
[INFO] [stdout]   --> src/style.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     Bold,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Faint`
[INFO] [stdout]   --> src/style.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Faint,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Italic`
[INFO] [stdout]   --> src/style.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     Italic,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Underline`
[INFO] [stdout]   --> src/style.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Underline,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Blink`
[INFO] [stdout]   --> src/style.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     Blink,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Invert`
[INFO] [stdout]   --> src/style.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     Invert,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `CrossedOut`
[INFO] [stdout]   --> src/style.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     CrossedOut,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Framed`
[INFO] [stdout]   --> src/style.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Framed,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `styled`
[INFO] [stdout]    --> src/style.rs:235:8
[INFO] [stdout]     |
[INFO] [stdout] 235 | pub fn styled<T: std::fmt::Display>(arg: T, style: Style) -> String {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/git.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let mut describe_fmt_options = git2::DescribeFormatOptions::new();
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/git.rs:84:9
[INFO] [stdout]    |
[INFO] [stdout] 84 |     let mut describe_fmt_options = git2::DescribeFormatOptions::new();
[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: field is never read: `size_policy`
[INFO] [stdout]   --> src/widget.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     size_policy: SizePolicy,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Line`
[INFO] [stdout]   --> src/widget.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | struct Line {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]   --> src/widget.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn add(&mut self, widget: Widget) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_with_separator`
[INFO] [stdout]    --> src/widget.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 101 |     pub fn add_with_separator(&mut self, widget: Widget, separator: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_with_separator_reversed`
[INFO] [stdout]    --> src/widget.rs:123:12
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn add_with_separator_reversed(&mut self, widget: Widget, separator: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size_policy`
[INFO] [stdout]   --> src/widget.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     size_policy: SizePolicy,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Line`
[INFO] [stdout]   --> src/widget.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 92 | struct Line {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]   --> src/widget.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn add(&mut self, widget: Widget) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_with_separator`
[INFO] [stdout]    --> src/widget.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout] 101 |     pub fn add_with_separator(&mut self, widget: Widget, separator: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_with_separator_reversed`
[INFO] [stdout]    --> src/widget.rs:123:12
[INFO] [stdout]     |
[INFO] [stdout] 123 |     pub fn add_with_separator_reversed(&mut self, widget: Widget, separator: String) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 43s
[INFO] running `Command { std: "docker" "inspect" "2d84cb5e7ae3750d2961bef0b2c5420bde6ec6332a8bbfdacfdb5c6a0b568440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d84cb5e7ae3750d2961bef0b2c5420bde6ec6332a8bbfdacfdb5c6a0b568440", kill_on_drop: false }`
[INFO] [stdout] 2d84cb5e7ae3750d2961bef0b2c5420bde6ec6332a8bbfdacfdb5c6a0b568440
