Syntax Error: unknown literal prefix in macros

[if0ne]

rust-analyzer version: 0.3.2154-standalone

rustc version: 1.82.0 (f6e511eec 2024-10-15)

editor or extension: VSCode

In the new version of RA, bugs appear when using the slog crate for logging. In slog there are tags that can be added to log messages and they are prefixed with #.

The previous version of RA (0.3.2146-standalone) does not have this problem.

Error output

[{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: unknown literal prefix",
	"source": "rust-analyzer",
	"startLineNumber": 180,
	"startColumn": 45,
	"endLineNumber": 180,
	"endColumn": 48
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: unknown literal prefix",
	"source": "rust-analyzer",
	"startLineNumber": 291,
	"startColumn": 35,
	"endLineNumber": 291,
	"endColumn": 38
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: unknown literal prefix",
	"source": "rust-analyzer",
	"startLineNumber": 291,
	"startColumn": 49,
	"endLineNumber": 291,
	"endColumn": 52
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: unknown literal prefix",
	"source": "rust-analyzer",
	"startLineNumber": 303,
	"startColumn": 66,
	"endLineNumber": 303,
	"endColumn": 70
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: unknown literal prefix",
	"source": "rust-analyzer",
	"startLineNumber": 305,
	"startColumn": 48,
	"endLineNumber": 305,
	"endColumn": 56
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: unknown literal prefix",
	"source": "rust-analyzer",
	"startLineNumber": 312,
	"startColumn": 54,
	"endLineNumber": 312,
	"endColumn": 60
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: unknown literal prefix",
	"source": "rust-analyzer",
	"startLineNumber": 315,
	"startColumn": 24,
	"endLineNumber": 315,
	"endColumn": 27
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: Missing trailing `\"` symbol to terminate the string literal",
	"source": "rust-analyzer",
	"startLineNumber": 320,
	"startColumn": 43,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected R_PAREN",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected SEMICOLON",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected R_CURLY",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected R_CURLY",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected R_CURLY",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected R_CURLY",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected R_CURLY",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected R_PAREN",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected SEMICOLON",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected R_CURLY",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected SEMICOLON",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
},{
	"resource": "*/src/main.rs",
	"owner": "rustc",
	"code": {
		"value": "syntax-error",
		"target": {
			"$mid": 1,
			"path": "/stable/reference/",
			"scheme": "https",
			"authority": "doc.rust-lang.org"
		}
	},
	"severity": 8,
	"message": "Syntax Error: expected R_CURLY",
	"source": "rust-analyzer",
	"startLineNumber": 325,
	"startColumn": 1,
	"endLineNumber": 325,
	"endColumn": 1
}]

[ChayimFriedman2]

@rustbot claim

[ChayimFriedman2]

First of all, if you add a space (# ") the problem goes away.

[Veykril]

For context this was caused by #18317