Consider this trivial class:

/**
 * A simple class
 */
public class A {

    /**
     * Very simple constructor
     *
     * @throws Exception {@inheritDoc}
     */
    public A() throws Exception {
    }
}

Running javadoc tool against it:

javadoc A.java

results in:

Loading source file A.java...
Constructing Javadoc information...
Building index for all the packages and classes...
Standard Doclet version 24+36-3646
Building tree for all the packages and classes...
Generating ./A.html...
error: An internal exception has occurred.
    (java.lang.IllegalArgumentException: A(), <init>, CONSTRUCTOR, com.sun.tools.javac.code.Symbol$MethodSymbol@3d921e20)
Please file a bug against the javadoc tool via the Java bug reporting page
(https://bugreport.java.com) after checking the Bug Database (https://bugs.java.com)
for duplicates. Include error messages and the following diagnostic in your report. Thank you.
java.lang.IllegalArgumentException: A(), <init>, CONSTRUCTOR, com.sun.tools.javac.code.Symbol$MethodSymbol@3d921e20
    at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.Utils$Overrides.<init>(Utils.java:2769)
    at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.Utils.lambda$overriddenMethods$0(Utils.java:2755)
    at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.DocFinder.search0(DocFinder.java:107)
    at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.util.DocFinder.find(DocFinder.java:76)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.taglets.ThrowsTaglet.expandShallowly(ThrowsTaglet.java:639)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.taglets.ThrowsTaglet.outputAnExceptionTagDeeply(ThrowsTaglet.java:433)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.taglets.ThrowsTaglet.outputAnExceptionTagDeeply(ThrowsTaglet.java:345)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.taglets.ThrowsTaglet.getAllBlockTagOutput0(ThrowsTaglet.java:251)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.taglets.ThrowsTaglet.getAllBlockTagOutput(ThrowsTaglet.java:184)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.taglets.TagletWriter.getBlockTagOutput(TagletWriter.java:265)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter.getBlockTagOutput(HtmlDocletWriter.java:396)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter.getBlockTagOutput(HtmlDocletWriter.java:382)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDocletWriter.addTagsInfo(HtmlDocletWriter.java:368)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.ConstructorWriter.addTags(ConstructorWriter.java:246)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.ConstructorWriter.buildTagInfo(ConstructorWriter.java:184)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.ConstructorWriter.buildConstructorDoc(ConstructorWriter.java:120)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.ConstructorWriter.buildDetails(ConstructorWriter.java:94)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.ClassWriter.buildMemberDetails(ClassWriter.java:338)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.ClassWriter.buildClassDoc(ClassWriter.java:138)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.ClassWriter.buildPage(ClassWriter.java:115)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:414)
    at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.AbstractDoclet.generateClassFiles(AbstractDoclet.java:246)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDoclet.generateClassFiles(HtmlDoclet.java:211)
    at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.AbstractDoclet.generateFiles(AbstractDoclet.java:179)
    at jdk.javadoc/jdk.javadoc.internal.doclets.formats.html.HtmlDoclet.generateFiles(HtmlDoclet.java:345)
    at jdk.javadoc/jdk.javadoc.internal.doclets.toolkit.AbstractDoclet.run(AbstractDoclet.java:82)
    at jdk.javadoc/jdk.javadoc.doclet.StandardDoclet.run(StandardDoclet.java:109)
    at jdk.javadoc/jdk.javadoc.internal.tool.Start.parseAndExecute(Start.java:588)
    at jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:399)
    at jdk.javadoc/jdk.javadoc.internal.tool.Start.begin(Start.java:348)
    at jdk.javadoc/jdk.javadoc.internal.tool.Main.execute(Main.java:57)
    at jdk.javadoc/jdk.javadoc.internal.tool.Main.main(Main.java:46)


The issue is reproducible in all JDK versions starting JDK 22. It reproduces even in latest JDK 25 EA as well JDK mainline.

The javadoc tool completes successfully, with a mere warning about the class' constructor javadoc, on JDK 21 or prior versions as follows:

Loading source file A.java...
...
Standard Doclet version 21+35-2513
...
Generating ./A.html...
A.java:11: warning: @inheritDoc used but A() does not override or implement any method.
    public A() throws Exception {
           ^
Generating ./package-summary.html...
Generating ./package-tree.html...
...
1 warning