gistfile1.txt

-*- mode: compilation; default-directory: "~/proj/rust/beep/src/" -*-
Compilation started at Wed Jan  2 13:07:48

cargo rustc --bin beep --message-format\=json -- --test
   Compiling beep v0.1.0 (/home/rob/proj/rust/beep)
{"reason":"compiler-message","package_id":"beep 0.1.0 (path+file:///home/rob/proj/rust/beep)","target":{"kind":["bin"],"crate_types":["bin"],"name":"beep","src_path":"/home/rob/proj/rust/beep/src/main.rs","edition":"2018"},"message":{"message":"variable `x` is assigned to, but never used","code":{"code":"unused_variables","explanation":null},"level":"warning","spans":[{"file_name":"src/main.rs","byte_start":21,"byte_end":22,"line_start":3,"line_end":3,"column_start":9,"column_end":10,"is_primary":true,"text":[{"text":"    let x = 1;","highlight_start":9,"highlight_end":10}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"#[warn(unused_variables)] on by default","code":null,"level":"note","spans":[],"children":[],"rendered":null},{"message":"consider using `_x` instead","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"warning: variable `x` is assigned to, but never used\n --> src/main.rs:3:9\n  |\n3 |     let x = 1;\n  |         ^\n  |\n  = note: #[warn(unused_variables)] on by default\n  = note: consider using `_x` instead\n\n"}}
{"reason":"compiler-message","package_id":"beep 0.1.0 (path+file:///home/rob/proj/rust/beep)","target":{"kind":["bin"],"crate_types":["bin"],"name":"beep","src_path":"/home/rob/proj/rust/beep/src/main.rs","edition":"2018"},"message":{"message":"value assigned to `x` is never read","code":{"code":"unused_assignments","explanation":null},"level":"warning","spans":[{"file_name":"src/main.rs","byte_start":32,"byte_end":33,"line_start":4,"line_end":4,"column_start":5,"column_end":6,"is_primary":true,"text":[{"text":"    x += 1;","highlight_start":5,"highlight_end":6}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"#[warn(unused_assignments)] on by default","code":null,"level":"note","spans":[],"children":[],"rendered":null}],"rendered":"warning: value assigned to `x` is never read\n --> src/main.rs:4:5\n  |\n4 |     x += 1;\n  |     ^\n  |\n  = note: #[warn(unused_assignments)] on by default\n\n"}}
{"reason":"compiler-message","package_id":"beep 0.1.0 (path+file:///home/rob/proj/rust/beep)","target":{"kind":["bin"],"crate_types":["bin"],"name":"beep","src_path":"/home/rob/proj/rust/beep/src/main.rs","edition":"2018"},"message":{"message":"cannot assign twice to immutable variable `x`","code":{"code":"E0384","explanation":"\nThis error occurs when an attempt is made to reassign an immutable variable.\nFor example:\n\n```compile_fail,E0384\nfn main() {\n    let x = 3;\n    x = 5; // error, reassignment of immutable variable\n}\n```\n\nBy default, variables in Rust are immutable. To fix this error, add the keyword\n`mut` after the keyword `let` when declaring the variable. For example:\n\n```\nfn main() {\n    let mut x = 3;\n    x = 5;\n}\n```\n"},"level":"error","spans":[{"file_name":"src/main.rs","byte_start":21,"byte_end":22,"line_start":3,"line_end":3,"column_start":9,"column_end":10,"is_primary":false,"text":[{"text":"    let x = 1;","highlight_start":9,"highlight_end":10}],"label":"first assignment to `x`","suggested_replacement":null,"suggestion_applicability":null,"expansion":null},{"file_name":"src/main.rs","byte_start":32,"byte_end":38,"line_start":4,"line_end":4,"column_start":5,"column_end":11,"is_primary":true,"text":[{"text":"    x += 1;","highlight_start":5,"highlight_end":11}],"label":"cannot assign twice to immutable variable","suggested_replacement":null,"suggestion_applicability":null,"expansion":null}],"children":[{"message":"make this binding mutable","code":null,"level":"help","spans":[{"file_name":"src/main.rs","byte_start":21,"byte_end":22,"line_start":3,"line_end":3,"column_start":9,"column_end":10,"is_primary":true,"text":[{"text":"    let x = 1;","highlight_start":9,"highlight_end":10}],"label":null,"suggested_replacement":"mut x","suggestion_applicability":"MachineApplicable","expansion":null}],"children":[],"rendered":null}],"rendered":"error[E0384]: cannot assign twice to immutable variable `x`\n --> src/main.rs:4:5\n  |\n3 |     let x = 1;\n  |         -\n  |         |\n  |         first assignment to `x`\n  |         help: make this binding mutable: `mut x`\n4 |     x += 1;\n  |     ^^^^^^ cannot assign twice to immutable variable\n\n"}}
{"reason":"compiler-message","package_id":"beep 0.1.0 (path+file:///home/rob/proj/rust/beep)","target":{"kind":["bin"],"crate_types":["bin"],"name":"beep","src_path":"/home/rob/proj/rust/beep/src/main.rs","edition":"2018"},"message":{"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"error: aborting due to previous error\n\n"}}
{"reason":"compiler-message","package_id":"beep 0.1.0 (path+file:///home/rob/proj/rust/beep)","target":{"kind":["bin"],"crate_types":["bin"],"name":"beep","src_path":"/home/rob/proj/rust/beep/src/main.rs","edition":"2018"},"message":{"message":"For more information about this error, try `rustc --explain E0384`.","code":null,"level":"","spans":[],"children":[],"rendered":"For more information about this error, try `rustc --explain E0384`.\n"}}
error: Could not compile `beep`.

To learn more, run the command again with --verbose.

Compilation exited abnormally with code 101 at Wed Jan  2 13:07:48