[INFO] updating cached repository pepeul1191/rust-tutorial
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pepeul1191/rust-tutorial
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pepeul1191/rust-tutorial" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/pepeul1191/rust-tutorial"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/pepeul1191/rust-tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pepeul1191/rust-tutorial" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/pepeul1191/rust-tutorial"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/pepeul1191/rust-tutorial'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b6a44b11db61c9d3e3eecf17c68275655e18cdde
[INFO] sha for GitHub repo pepeul1191/rust-tutorial: b6a44b11db61c9d3e3eecf17c68275655e18cdde
[INFO] validating manifest of pepeul1191/rust-tutorial on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pepeul1191/rust-tutorial on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing pepeul1191/rust-tutorial
[INFO] finished frobbing pepeul1191/rust-tutorial
[INFO] frobbed toml for pepeul1191/rust-tutorial written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/pepeul1191/rust-tutorial/Cargo.toml
[INFO] started frobbing pepeul1191/rust-tutorial
[INFO] finished frobbing pepeul1191/rust-tutorial
[INFO] frobbed toml for pepeul1191/rust-tutorial written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/pepeul1191/rust-tutorial/Cargo.toml
[INFO] crate pepeul1191/rust-tutorial already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking pepeul1191/rust-tutorial against master#0f88167f89fffe321590c5148f21b7d51d44388d for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-1/master#0f88167f89fffe321590c5148f21b7d51d44388d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/pepeul1191/rust-tutorial:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f4d84910c52a5655c19ba45182a44e210b7dc4981ce26ae3a0fda3fbbc100e5e
[INFO] running `"docker" "start" "-a" "f4d84910c52a5655c19ba45182a44e210b7dc4981ce26ae3a0fda3fbbc100e5e"`
[INFO] [stderr]     Checking mustache v0.8.2
[INFO] [stderr]     Checking hyper v0.10.13
[INFO] [stderr]     Checking nickel v0.10.1
[INFO] [stderr]     Checking nickel-demo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `is_it_true`
[INFO] [stderr]   --> src/main.rs:11:7
[INFO] [stderr]    |
[INFO] [stderr] 11 |   let is_it_true: bool = true;
[INFO] [stderr]    |       ^^^^^^^^^^ help: consider prefixing with an underscore: `_is_it_true`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `let_x`
[INFO] [stderr]   --> src/main.rs:12:7
[INFO] [stderr]    |
[INFO] [stderr] 12 |   let let_x: char = 'x';
[INFO] [stderr]    |       ^^^^^ help: consider prefixing with an underscore: `_let_x`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:10:7
[INFO] [stderr]    |
[INFO] [stderr] 10 |   let mut num: i32 = 10;
[INFO] [stderr]    |       ----^^^
[INFO] [stderr]    |       |
[INFO] [stderr]    |       help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `func2`
[INFO] [stderr]  --> src/constants.rs:2:2
[INFO] [stderr]   |
[INFO] [stderr] 2 |     pub fn func2() {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `goodbye`
[INFO] [stderr]  --> src/english/farewells.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn goodbye() -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hello`
[INFO] [stderr]  --> src/japanese/greetings.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn hello() -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `goodbye`
[INFO] [stderr]  --> src/japanese/farewells.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn goodbye() -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:32:3
[INFO] [stderr]    |
[INFO] [stderr] 32 |   server.listen("127.0.0.1:6767");
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `is_it_true`
[INFO] [stderr]   --> src/main.rs:11:7
[INFO] [stderr]    |
[INFO] [stderr] 11 |   let is_it_true: bool = true;
[INFO] [stderr]    |       ^^^^^^^^^^ help: consider prefixing with an underscore: `_is_it_true`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `let_x`
[INFO] [stderr]   --> src/main.rs:12:7
[INFO] [stderr]    |
[INFO] [stderr] 12 |   let let_x: char = 'x';
[INFO] [stderr]    |       ^^^^^ help: consider prefixing with an underscore: `_let_x`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:10:7
[INFO] [stderr]    |
[INFO] [stderr] 10 |   let mut num: i32 = 10;
[INFO] [stderr]    |       ----^^^
[INFO] [stderr]    |       |
[INFO] [stderr]    |       help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `func2`
[INFO] [stderr]  --> src/constants.rs:2:2
[INFO] [stderr]   |
[INFO] [stderr] 2 |     pub fn func2() {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `goodbye`
[INFO] [stderr]  --> src/english/farewells.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn goodbye() -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hello`
[INFO] [stderr]  --> src/japanese/greetings.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn hello() -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `goodbye`
[INFO] [stderr]  --> src/japanese/farewells.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn goodbye() -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:32:3
[INFO] [stderr]    |
[INFO] [stderr] 32 |   server.listen("127.0.0.1:6767");
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.84s
[INFO] running `"docker" "inspect" "f4d84910c52a5655c19ba45182a44e210b7dc4981ce26ae3a0fda3fbbc100e5e"`
[INFO] running `"docker" "rm" "-f" "f4d84910c52a5655c19ba45182a44e210b7dc4981ce26ae3a0fda3fbbc100e5e"`
[INFO] [stdout] f4d84910c52a5655c19ba45182a44e210b7dc4981ce26ae3a0fda3fbbc100e5e