[INFO] updating cached repository tperdue321/rust_basics [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/tperdue321/rust_basics [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/tperdue321/rust_basics" "work/ex/beta-1.38-1/sources/1.37.0/gh/tperdue321/rust_basics"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tperdue321/rust_basics'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/tperdue321/rust_basics" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tperdue321/rust_basics"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tperdue321/rust_basics'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 54afaa614ea2aedeb79508968f5e08a147b12e2e [INFO] sha for GitHub repo tperdue321/rust_basics: 54afaa614ea2aedeb79508968f5e08a147b12e2e [INFO] validating manifest of tperdue321/rust_basics on toolchain 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of tperdue321/rust_basics on toolchain beta-2019-08-13 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing tperdue321/rust_basics [INFO] finished frobbing tperdue321/rust_basics [INFO] frobbed toml for tperdue321/rust_basics written to work/ex/beta-1.38-1/sources/1.37.0/gh/tperdue321/rust_basics/Cargo.toml [INFO] started frobbing tperdue321/rust_basics [INFO] finished frobbing tperdue321/rust_basics [INFO] frobbed toml for tperdue321/rust_basics written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tperdue321/rust_basics/Cargo.toml [INFO] crate tperdue321/rust_basics already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing tperdue321/rust_basics against beta-2019-08-13 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tperdue321/rust_basics:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"` [INFO] [stdout] 68d31555badff373f4000d9116efb06e525bb7273faffe36a38c5ba5c0a6bd8d [INFO] running `"docker" "start" "-a" "68d31555badff373f4000d9116efb06e525bb7273faffe36a38c5ba5c0a6bd8d"` [INFO] [stderr] Compiling basics v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/main.rs:9:9 [INFO] [stderr] | [INFO] [stderr] 9 | let a: i32 = 1; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable `b` is assigned to, but never used [INFO] [stderr] --> src/main.rs:14:13 [INFO] [stderr] | [INFO] [stderr] 14 | let mut b: i32 = 15; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_b` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `b` is never read [INFO] [stderr] --> src/main.rs:15:5 [INFO] [stderr] | [INFO] [stderr] 15 | b = 25; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/main.rs:17:9 [INFO] [stderr] | [INFO] [stderr] 17 | let x: i32; // bindings need to be given a starting val. this is bad [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `x` is never read [INFO] [stderr] --> src/main.rs:38:13 [INFO] [stderr] | [INFO] [stderr] 38 | let mut x: i32 = 1; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/main.rs:42:9 [INFO] [stderr] | [INFO] [stderr] 42 | let y = 4; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/main.rs:45:9 [INFO] [stderr] | [INFO] [stderr] 45 | let y = "I can also be bound to text!"; // `y` is now of a different type. [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/main.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let x = return_int_plus_1(1); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `diverges` [INFO] [stderr] --> src/main.rs:93:1 [INFO] [stderr] | [INFO] [stderr] 93 | fn diverges() -> ! { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.55s [INFO] running `"docker" "inspect" "68d31555badff373f4000d9116efb06e525bb7273faffe36a38c5ba5c0a6bd8d"` [INFO] running `"docker" "rm" "-f" "68d31555badff373f4000d9116efb06e525bb7273faffe36a38c5ba5c0a6bd8d"` [INFO] [stdout] 68d31555badff373f4000d9116efb06e525bb7273faffe36a38c5ba5c0a6bd8d [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tperdue321/rust_basics:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"` [INFO] [stdout] dbdd53623306a24211ed755fba4b53045193b5c3bdb5f1d5051f90cb1f9bfc4d [INFO] running `"docker" "start" "-a" "dbdd53623306a24211ed755fba4b53045193b5c3bdb5f1d5051f90cb1f9bfc4d"` [INFO] [stderr] Compiling basics v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused variable: `a` [INFO] [stderr] --> src/main.rs:9:9 [INFO] [stderr] | [INFO] [stderr] 9 | let a: i32 = 1; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_a` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable `b` is assigned to, but never used [INFO] [stderr] --> src/main.rs:14:13 [INFO] [stderr] | [INFO] [stderr] 14 | let mut b: i32 = 15; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: consider using `_b` instead [INFO] [stderr] [INFO] [stderr] warning: value assigned to `b` is never read [INFO] [stderr] --> src/main.rs:15:5 [INFO] [stderr] | [INFO] [stderr] 15 | b = 25; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/main.rs:17:9 [INFO] [stderr] | [INFO] [stderr] 17 | let x: i32; // bindings need to be given a starting val. this is bad [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: value assigned to `x` is never read [INFO] [stderr] --> src/main.rs:38:13 [INFO] [stderr] | [INFO] [stderr] 38 | let mut x: i32 = 1; [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/main.rs:42:9 [INFO] [stderr] | [INFO] [stderr] 42 | let y = 4; [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `y` [INFO] [stderr] --> src/main.rs:45:9 [INFO] [stderr] | [INFO] [stderr] 45 | let y = "I can also be bound to text!"; // `y` is now of a different type. [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_y` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `x` [INFO] [stderr] --> src/main.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let x = return_int_plus_1(1); [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_x` [INFO] [stderr] [INFO] [stderr] warning: function is never used: `diverges` [INFO] [stderr] --> src/main.rs:93:1 [INFO] [stderr] | [INFO] [stderr] 93 | fn diverges() -> ! { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.64s [INFO] running `"docker" "inspect" "dbdd53623306a24211ed755fba4b53045193b5c3bdb5f1d5051f90cb1f9bfc4d"` [INFO] running `"docker" "rm" "-f" "dbdd53623306a24211ed755fba4b53045193b5c3bdb5f1d5051f90cb1f9bfc4d"` [INFO] [stdout] dbdd53623306a24211ed755fba4b53045193b5c3bdb5f1d5051f90cb1f9bfc4d [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tperdue321/rust_basics:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"` [INFO] [stdout] 9c94ccec8d4098c1ff3aae76f4c63263a7dac55a0d60c81d7387ece4c3eef026 [INFO] running `"docker" "start" "-a" "9c94ccec8d4098c1ff3aae76f4c63263a7dac55a0d60c81d7387ece4c3eef026"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stderr] Running /opt/crater/target/debug/deps/basics-bf24318ff7b99c6a [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `"docker" "inspect" "9c94ccec8d4098c1ff3aae76f4c63263a7dac55a0d60c81d7387ece4c3eef026"` [INFO] running `"docker" "rm" "-f" "9c94ccec8d4098c1ff3aae76f4c63263a7dac55a0d60c81d7387ece4c3eef026"` [INFO] [stdout] 9c94ccec8d4098c1ff3aae76f4c63263a7dac55a0d60c81d7387ece4c3eef026