Javadoc overriding methods not inheriting @param descriptions

EDIT: This issue was originally about the {@inheritDoc} tag, but I realized it's actually caused by something else after some more experimentation.

When method Javadocs are inherited through {@inheritDoc}, the parameter descriptions are not shown in the hover popups.

When hovering over methods that override a parent method, the descriptions for @param tags in the parent's Javadoc are not inherited, which does not match the Javadoc tool's HTML output.

Environment

• Operating System: Ubuntu 18.04/20.04
• JDK version: 11.0.3
• Visual Studio Code version: 1.36.0-insider/1.56.0-insider
• Java extension version: 0.46.0/0.77.0

Steps To Reproduce

1. Open a new folder
2. Create two Java files:

public class Foo {
    /**
     * Foo.foo
     * 
     * @param i an int
     */
    public int foo(int i) {
        return i;
    }
}

public class Bar extends Foo {
    @Override
    public int foo(int i) {
        return i;
    }
}

3. Hover over the foo method name in Bar to see the Javadoc.

Current Result

When hovering above Bar.foo(int), in the Javadoc popup, the description for the parameter i is empty:

Expected Result

The description for i should be the same as in Foo.foo(int), which is what the Javadoc tool does:

According to the documentation of the Javadoc tool, the missing @param tags should have been inherited from the overridden method. This does work for @return and @throws tags, but not for @param tags.

首先，使用 issue 中的 Foo 和 Bar Java 文件重现 hover 行为，然后将被重写方法的 Javadoc 与 Javadoc 工具的 HTML 输出进行比较。当继承的 i 的 @param 描述出现在 hover 弹窗中，并且与父方法及文档记录的 Javadoc 行为一致时，该 issue 即完成。