[INFO] cloning repository https://github.com/tyrchen/rust-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tyrchen/rust-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftyrchen%2Frust-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftyrchen%2Frust-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8f49eed2a8eae64a0b33014df8a6f57e78d00fca
[INFO] checking tyrchen/rust-demo against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftyrchen%2Frust-demo" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tyrchen/rust-demo on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tyrchen/rust-demo
[INFO] finished tweaking git repo https://github.com/tyrchen/rust-demo
[INFO] tweaked toml for git repo https://github.com/tyrchen/rust-demo written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/tyrchen/rust-demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /workspace/builds/worker-8/source/error_handling/Cargo.toml
[INFO] [stderr] workspace: /workspace/builds/worker-8/source/Cargo.toml
[INFO] [stderr]     Updating git repository `https://github.com/pingcap/rust-rocksdb.git`
[INFO] [stderr]     Updating git submodule `https://github.com/pingcap/rocksdb.git`
[INFO] [stderr]     Updating git submodule `https://github.com/pingcap/titan.git`
[INFO] [stderr]     Updating git repository `https://github.com/alexcrichton/bzip2-rs.git`
[INFO] [stderr]     Updating git repository `https://github.com/busyjay/lz4-rs.git`
[INFO] [stderr]     Updating git submodule `https://github.com/lz4/lz4.git`
[INFO] [stderr]     Updating git repository `https://github.com/busyjay/rust-snappy.git`
[INFO] [stderr]     Updating git submodule `https://github.com/google/snappy.git`
[INFO] [stderr]     Updating git repository `https://github.com/gyscos/zstd-rs.git`
[INFO] [stderr]     Updating git submodule `https://github.com/facebook/zstd`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded h2 v0.1.23
[INFO] [stderr]   Downloaded syn v0.15.35
[INFO] [stderr]   Downloaded hyper v0.12.29
[INFO] [stderr]   Downloaded cmake v0.1.40
[INFO] [stderr]   Downloaded num-bigint v0.2.2
[INFO] [stderr]   Downloaded partial_application v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6baa76ab77f1e31ea4639b32e89141ddcc02e655d4cd92898c0644d5ae102911
[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" "6baa76ab77f1e31ea4639b32e89141ddcc02e655d4cd92898c0644d5ae102911", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6baa76ab77f1e31ea4639b32e89141ddcc02e655d4cd92898c0644d5ae102911", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6baa76ab77f1e31ea4639b32e89141ddcc02e655d4cd92898c0644d5ae102911", kill_on_drop: false }`
[INFO] [stdout] 6baa76ab77f1e31ea4639b32e89141ddcc02e655d4cd92898c0644d5ae102911
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5609f2cb7d893a1caeb783e5befa258d5ceb9af43b0e0a7e44dd2edfd5005788
[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" "5609f2cb7d893a1caeb783e5befa258d5ceb9af43b0e0a7e44dd2edfd5005788", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /opt/rustwide/workdir/error_handling/Cargo.toml
[INFO] [stderr] workspace: /opt/rustwide/workdir/Cargo.toml
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling cfg-if v0.1.9
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]     Checking rand_core v0.4.0
[INFO] [stderr]     Checking futures v0.1.27
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking smallvec v0.6.10
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.35
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking rustc-demangle v0.1.15
[INFO] [stderr]    Compiling serde v1.0.92
[INFO] [stderr]    Compiling openssl v0.10.23
[INFO] [stderr]    Compiling regex v1.1.7
[INFO] [stderr]    Compiling ryu v0.2.8
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling httparse v1.3.3
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling num-bigint v0.2.2
[INFO] [stderr]     Checking adler32 v1.0.3
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]     Checking indexmap v1.0.2
[INFO] [stderr]     Checking openssl-probe v0.1.2
[INFO] [stderr]    Compiling encoding_rs v0.8.17
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking dtoa v0.4.4
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking iterator v0.1.0 (/opt/rustwide/workdir/iterator)
[INFO] [stdout] warning: function is never used: `shoes_in_my_size`
[INFO] [stdout]  --> iterator/src/lib.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn shoes_in_my_size(shoes: Vec<Shoe>, shoe_size: u32) -> Vec<Shoe> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> iterator/src/lib.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 16 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking partial_application v0.1.0
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]     Checking adder v0.1.0 (/opt/rustwide/workdir/adder)
[INFO] [stderr]     Checking trait_eval v0.1.0 (/opt/rustwide/workdir/trait_eval)
[INFO] [stderr]     Checking closure v0.1.0 (/opt/rustwide/workdir/closure)
[INFO] [stderr]     Checking vector v0.1.0 (/opt/rustwide/workdir/vector)
[INFO] [stderr]     Checking grammar v0.1.0 (/opt/rustwide/workdir/grammar)
[INFO] [stderr]     Checking pattern_match v0.1.0 (/opt/rustwide/workdir/pattern_match)
[INFO] [stderr]     Checking macros v0.1.0 (/opt/rustwide/workdir/macros)
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> adder/src/lib.rs:22:3
[INFO] [stdout]    |
[INFO] [stdout] 22 |   value: i32,
[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] [stderr]     Checking blog v0.1.0 (/opt/rustwide/workdir/blog)
[INFO] [stderr]     Checking ip_address v0.1.0 (/opt/rustwide/workdir/ip_address)
[INFO] [stderr]     Checking lifetime v0.1.0 (/opt/rustwide/workdir/lifetime)
[INFO] [stderr]     Checking generics v0.1.0 (/opt/rustwide/workdir/generics)
[INFO] [stderr]     Checking error_handling v0.1.0 (/opt/rustwide/workdir/error_handling)
[INFO] [stderr]     Checking hashmap v0.1.0 (/opt/rustwide/workdir/hashmap)
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]  --> ip_address/src/main.rs:9:3
[INFO] [stdout]   |
[INFO] [stdout] 9 |   Quit,
[INFO] [stdout]   |   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]   --> ip_address/src/main.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout] 10 |   Move { x: i32, y: i32 },
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]   --> ip_address/src/main.rs:12:3
[INFO] [stdout]    |
[INFO] [stdout] 12 |   ChangeColor(i32, i32, i32),
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking string v0.1.0 (/opt/rustwide/workdir/string)
[INFO] [stderr]     Checking size_example v0.1.0 (/opt/rustwide/workdir/size_example)
[INFO] [stdout] warning: function is never used: `do_panic`
[INFO] [stdout]   --> error_handling/src/main.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn do_panic() {
[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] [stderr]     Checking common_traits v0.1.0 (/opt/rustwide/workdir/common_traits)
[INFO] [stdout] warning: struct is never constructed: `Context`
[INFO] [stdout]  --> lifetime/src/advanced.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Context<'s>(&'s str);
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Parser`
[INFO] [stdout]  --> lifetime/src/advanced.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Parser<'c, 's> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse`
[INFO] [stdout]  --> lifetime/src/advanced.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 |   fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_context`
[INFO] [stdout]   --> lifetime/src/advanced.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `item`
[INFO] [stdout]  --> size_example/src/main.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   item: u8,
[INFO] [stdout]   |   ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nil`
[INFO] [stdout]   --> size_example/src/main.rs:31:3
[INFO] [stdout]    |
[INFO] [stdout] 31 |   Nil,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cash`
[INFO] [stdout]   --> size_example/src/main.rs:32:3
[INFO] [stdout]    |
[INFO] [stdout] 32 |   Cash(u16),
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Admin`
[INFO] [stdout]  --> common_traits/src/default.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 5 |   Admin,
[INFO] [stdout]   |   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Designer`
[INFO] [stdout]  --> common_traits/src/default.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   Designer,
[INFO] [stdout]   |   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Specialist`
[INFO] [stdout]  --> common_traits/src/default.rs:8:3
[INFO] [stdout]   |
[INFO] [stdout] 8 |   Specialist,
[INFO] [stdout]   |   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rectangles v0.1.0 (/opt/rustwide/workdir/rectangles)
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]  --> ip_address/src/main.rs:9:3
[INFO] [stdout]   |
[INFO] [stdout] 9 |   Quit,
[INFO] [stdout]   |   ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]   --> ip_address/src/main.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout] 10 |   Move { x: i32, y: i32 },
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]   --> ip_address/src/main.rs:12:3
[INFO] [stdout]    |
[INFO] [stdout] 12 |   ChangeColor(i32, i32, i32),
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Context`
[INFO] [stdout]  --> lifetime/src/advanced.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Context<'s>(&'s str);
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Parser`
[INFO] [stdout]  --> lifetime/src/advanced.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Parser<'c, 's> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `parse`
[INFO] [stdout]  --> lifetime/src/advanced.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 |   fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_context`
[INFO] [stdout]   --> lifetime/src/advanced.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `item`
[INFO] [stdout]  --> size_example/src/main.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   item: u8,
[INFO] [stdout]   |   ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nil`
[INFO] [stdout]   --> size_example/src/main.rs:31:3
[INFO] [stdout]    |
[INFO] [stdout] 31 |   Nil,
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Cash`
[INFO] [stdout]   --> size_example/src/main.rs:32:3
[INFO] [stdout]    |
[INFO] [stdout] 32 |   Cash(u16),
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stdout] warning: variant is never constructed: `Admin`
[INFO] [stdout]  --> common_traits/src/default.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 5 |   Admin,
[INFO] [stdout]   |   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Designer`
[INFO] [stdout]  --> common_traits/src/default.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   Designer,
[INFO] [stdout]   |   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Specialist`
[INFO] [stdout]  --> common_traits/src/default.rs:8:3
[INFO] [stdout]   |
[INFO] [stdout] 8 |   Specialist,
[INFO] [stdout]   |   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking try_from v0.3.2
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling crossbeam-utils v0.6.5
[INFO] [stdout] warning: function is never used: `do_panic`
[INFO] [stdout]   --> error_handling/src/main.rs:33:4
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn do_panic() {
[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] [stderr]     Checking rand_core v0.3.1
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> adder/src/lib.rs:22:3
[INFO] [stdout]    |
[INFO] [stdout] 22 |   value: i32,
[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] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking tokio-trace-core v0.2.0
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stdout] error[E0034]: multiple applicable items in scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/try_from-0.3.2/src/char.rs:56:28
[INFO] [stdout]     |
[INFO] [stdout] 56  |                 match u32::try_from(n)? {
[INFO] [stdout]     |                            ^^^^^^^^ multiple `try_from` found
[INFO] [stdout] ...
[INFO] [stdout] 68  | impl_int_to_char!(i8, i16, i32, i64, isize, u16, u32, u64, usize);
[INFO] [stdout]     | ------------------------------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout] note: candidate #1 is defined in the trait `TryFrom`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/try_from-0.3.2/src/lib.rs:21:5
[INFO] [stdout]     |
[INFO] [stdout] 21  |     fn try_from(T) -> Result<Self, Self::Err>;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] note: candidate #2 is defined in the trait `std::convert::TryFrom`
[INFO] [stdout]     = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: disambiguate the associated function for candidate #1
[INFO] [stdout]     |
[INFO] [stdout] 56  |                 match TryFrom::try_from(n)? {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^
[INFO] [stdout] help: disambiguate the associated function for candidate #2
[INFO] [stdout]     |
[INFO] [stdout] 56  |                 match std::convert::TryFrom::try_from(n)? {
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0034`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling backtrace v0.3.30
[INFO] [stderr] error: could not compile `try_from`
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "5609f2cb7d893a1caeb783e5befa258d5ceb9af43b0e0a7e44dd2edfd5005788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5609f2cb7d893a1caeb783e5befa258d5ceb9af43b0e0a7e44dd2edfd5005788", kill_on_drop: false }`
[INFO] [stdout] 5609f2cb7d893a1caeb783e5befa258d5ceb9af43b0e0a7e44dd2edfd5005788