handle renaming files properly

Author: ds300

property-based-tests/regressionTests.test.ts

@@ -172,4 +172,13 @@ describe("regression tests", () => {
       },
     })
   })
+
+  describe("17", () => {
+    executeTestCase({
+      cleanFiles: {
+        abc: { contents: "E\n", mode: 420 },
+      },
+      modifiedFiles: { cpz: { contents: "E\n", mode: 420 } },
+    })
+  })
 })

src/patch/parse.ts

@@ -167,7 +167,7 @@ class PatchParser {
 
       if (this.currentLine.startsWith("rename from")) {
         const fromPath = this.currentLine.slice("rename from ".length)
-        const toPath = this.lines[this.i++].slice("rename to ".length).trim()
+        const toPath = this.lines[++this.i].slice("rename to ".length).trim()
         this.result.push({ type: "rename", fromPath, toPath })
         continue
       }