fix: generateCodeFrame infinite loop (#15093)

Author: sapphi-red

packages/vite/src/node/__tests__/__snapshots__/utils.spec.ts.snap

@@ -25,14 +25,61 @@ exports[`generateCodeFrames > end 3`] = `
 "
 `;
 
+exports[`generateCodeFrames > end 4`] = `
+"
+1  |  import foo from './foo'
+   |  ^^^^^^^^^^^^^^^^^^^^^^^
+2  |  foo()
+   |  ^^^^^
+"
+`;
+
+exports[`generateCodeFrames > end 5`] = `
+"
+1  |  import foo from './foo'
+   |  ^^^^^^^^^^^^^^^^^^^^^^^
+2  |  foo()
+   |  ^^^^^
+"
+`;
+
+exports[`generateCodeFrames > end 6`] = `
+"
+1  |  import foo from './foo'
+   |  ^^^^^^^^^^^^^^^^^^^^^^^
+2  |  foo()
+   |  ^^^^^
+"
+`;
+
+exports[`generateCodeFrames > invalid start > end 1`] = `
+"
+1  |  import foo from './foo'
+   |    ^
+2  |  foo()
+"
+`;
+
 exports[`generateCodeFrames > range 1`] = `
 "
-1  |  
-2  |  import foo from './foo'
-3  |  
+1  |  import foo from './foo'
+2  |  
+3  |  foo()
    |  ^
-4  |  foo()
-5  |  
+4  |  // 1
+5  |  // 2
+"
+`;
+
+exports[`generateCodeFrames > range 2`] = `
+"
+1  |  import foo from './foo'
+2  |  
+3  |  foo()
+   |  ^^^^^
+4  |  // 1
+   |  ^
+5  |  // 2
 "
 `;
 
@@ -47,13 +94,21 @@ exports[`generateCodeFrames > start with number 1`] = `
 exports[`generateCodeFrames > start with number 2`] = `
 "
 1  |  import foo from './foo'
-   |   ^
+   |  ^
 2  |  foo()
 "
 `;
 
 exports[`generateCodeFrames > start with number 3`] = `
 "
+1  |  import foo from './foo'
+   |   ^
+2  |  foo()
+"
+`;
+
+exports[`generateCodeFrames > start with number 4`] = `
+"
 1  |  import foo from './foo'
 2  |  foo()
    |  ^

packages/vite/src/node/__tests__/utils.spec.ts

@@ -187,10 +187,10 @@ foo()
 import foo from './foo'
 
 foo()
-
-// bar
-// baz
-  `
+// 1
+// 2
+// 3
+`.trim()
 
   const expectSnapshot = (value: string) => {
     try {
@@ -204,6 +204,7 @@ foo()
   }
 
   test('start with number', () => {
+    expectSnapshot(generateCodeFrame(source, -1))
     expectSnapshot(generateCodeFrame(source, 0))
     expectSnapshot(generateCodeFrame(source, 1))
     expectSnapshot(generateCodeFrame(source, 24))
@@ -223,10 +224,24 @@ foo()
     expectSnapshot(generateCodeFrame(source, 0, 0))
     expectSnapshot(generateCodeFrame(source, 0, 23))
     expectSnapshot(generateCodeFrame(source, 0, 29))
+    expectSnapshot(generateCodeFrame(source, 0, source.length))
+    expectSnapshot(generateCodeFrame(source, 0, source.length + 1))
+    expectSnapshot(generateCodeFrame(source, 0, source.length + 100))
   })
 
   test('range', () => {
     expectSnapshot(generateCodeFrame(longSource, { line: 3, column: 0 }))
+    expectSnapshot(
+      generateCodeFrame(
+        longSource,
+        { line: 3, column: 0 },
+        { line: 4, column: 0 },
+      ),
+    )
+  })
+
+  test('invalid start > end', () => {
+    expectSnapshot(generateCodeFrame(source, 2, 0))
   })
 })
 

packages/vite/src/node/utils.ts

@@ -505,8 +505,11 @@ export function generateCodeFrame(
   start: number | Pos = 0,
   end?: number | Pos,
 ): string {
-  start = posToNumber(source, start)
-  end = end !== undefined ? posToNumber(source, end) : start
+  start = Math.max(posToNumber(source, start), 0)
+  end = Math.min(
+    end !== undefined ? posToNumber(source, end) : start,
+    source.length,
+  )
   const lines = source.split(splitRE)
   let count = 0
   const res: string[] = []