Refactoring extraction methods leads to inconsistent code behavior

[provide a description of the issue]

Environment

Operating System: Windows11
JDK version: 17
Visual Studio Code version: 1.88
Java extension version: 1.29

Steps To Reproduce

1. select "switch (value) {...return result;"
2. click “Refacator-Extract to method”

class ExtractMethodTest {
private final int value;

public ExtractMethodTest(int value) {
this.value = value;
}

public synchronized int calculate() {
int result;
// extract method
switch (value) {
case 1:
result = value * 2;
break;
case 2:
result = value * 3;
break;
default:
result = value * 4;
break;
}
return result;
// end
}
}

refactoring result:

Reason: Local variables have been added to the extraction method, and if the inline method refactoring is performed, it will not match the behavior of the original code

Expected behavior: Check before and after refactoring and provide warning prompts

报告中没有指定源文件或测试。请在 Windows 11 上使用 JDK 17 重现 Extract to method 案例，然后比较原始行为、提取后的行为和 inline 重构后的行为。检测到不一致的行为，并在重构之前或之后显示适当的警告，即视为完成。