A DESCRIPTION OF THE PROBLEM :
I encountered the below error while compiling my code. This happens on a large codebase and I haven't been able to narrow the cause down to a small example yet.

An exception has occurred in the compiler (24.0.2). Please file a bug against the Java compiler via the Java bug reporting page (https://bugreport.java.com) after checking the Bug Database (https://bugs.java.com) for duplicates. Include your program, the following diagnostic, and the parameters passed to the Java compiler in your report. Thank you.
java.lang.AssertionError: Missing type variable in where clause: A
at jdk.compiler/com.sun.tools.javac.util.RichDiagnosticFormatter.unique(RichDiagnosticFormatter.java:252)
at jdk.compiler/com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitTypeVar(RichDiagnosticFormatter.java:403)
at jdk.compiler/com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitTypeVar(RichDiagnosticFormatter.java:345)
at jdk.compiler/com.sun.tools.javac.code.Type$TypeVar.accept(Type.java:1709)
at jdk.compiler/com.sun.tools.javac.code.Printer.visit(Printer.java:136)
at jdk.compiler/com.sun.tools.javac.code.Printer.visitWildcardType(Printer.java:264)
at jdk.compiler/com.sun.tools.javac.code.Printer.visitWildcardType(Printer.java:52)
at jdk.compiler/com.sun.tools.javac.code.Type$WildcardType.accept(Type.java:868)
at jdk.compiler/com.sun.tools.javac.code.Printer.visit(Printer.java:136)
at jdk.compiler/com.sun.tools.javac.code.Printer.visitTypes(Printer.java:108)
at jdk.compiler/com.sun.tools.javac.code.Printer.visitClassType(Printer.java:241)
at jdk.compiler/com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:385)
at jdk.compiler/com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitClassType(RichDiagnosticFormatter.java:345)
at jdk.compiler/com.sun.tools.javac.code.Type$ClassType.accept(Type.java:1053)
at jdk.compiler/com.sun.tools.javac.code.Printer.visit(Printer.java:136)
at jdk.compiler/com.sun.tools.javac.code.Printer.printMethodArgs(Printer.java:345)
at jdk.compiler/com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitMethodSymbol(RichDiagnosticFormatter.java:442)
at jdk.compiler/com.sun.tools.javac.util.RichDiagnosticFormatter$RichPrinter.visitMethodSymbol(RichDiagnosticFormatter.java:345)
at jdk.compiler/com.sun.tools.javac.code.Symbol$MethodSymbol.accept(Symbol.java:2314)
at jdk.compiler/com.sun.tools.javac.code.Printer.visit(Printer.java:147)
at jdk.compiler/com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArgument(AbstractDiagnosticFormatter.java:209)
at jdk.compiler/com.sun.tools.javac.util.AbstractDiagnosticFormatter.formatArguments(AbstractDiagnosticFormatter.java:167)
at jdk.compiler/com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMessage(BasicDiagnosticFormatter.java:111)
at jdk.compiler/com.sun.tools.javac.util.BasicDiagnosticFormatter.formatMeta(BasicDiagnosticFormatter.java:186)
at jdk.compiler/com.sun.tools.javac.util.BasicDiagnosticFormatter.formatDiagnostic(BasicDiagnosticFormatter.java:100)
at jdk.compiler/com.sun.tools.javac.util.AbstractDiagnosticFormatter.format(AbstractDiagnosticFormatter.java:123)
at jdk.compiler/com.sun.tools.javac.util.RichDiagnosticFormatter.format(RichDiagnosticFormatter.java:118)
at jdk.compiler/com.sun.tools.javac.util.RichDiagnosticFormatter.format(RichDiagnosticFormatter.java:72)
at jdk.compiler/com.sun.tools.javac.util.Log.writeDiagnostic(Log.java:747)
at jdk.compiler/com.sun.tools.javac.util.Log$DefaultDiagnosticHandler.report(Log.java:722)
at jdk.compiler/com.sun.tools.javac.util.Log.report(Log.java:675)
at jdk.compiler/com.sun.tools.javac.comp.Resolve.logResolveError(Resolve.java:4030)
at jdk.compiler/com.sun.tools.javac.comp.Resolve.accessInternal(Resolve.java:2634)
at jdk.compiler/com.sun.tools.javac.comp.Resolve.accessMethod(Resolve.java:2652)
at jdk.compiler/com.sun.tools.javac.comp.Resolve$BasicLookupHelper.access(Resolve.java:3539)
at jdk.compiler/com.sun.tools.javac.comp.Resolve$12.access(Resolve.java:2829)
at jdk.compiler/com.sun.tools.javac.comp.Resolve.lookupMethod(Resolve.java:3789)
at jdk.compiler/com.sun.tools.javac.comp.Resolve.resolveQualifiedMethod(Resolve.java:2819)
at jdk.compiler/com.sun.tools.javac.comp.Resolve.resolveQualifiedMethod(Resolve.java:2813)
at jdk.compiler/com.sun.tools.javac.comp.Attr.selectSym(Attr.java:4527)
at jdk.compiler/com.sun.tools.javac.comp.Attr.visitSelect(Attr.java:4414)
at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCFieldAccess.accept(JCTree.java:2577)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:676)
at jdk.compiler/com.sun.tools.javac.comp.Attr.visitApply(Attr.java:2646)
at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodInvocation.accept(JCTree.java:1861)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:676)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribExpr(Attr.java:729)
at jdk.compiler/com.sun.tools.javac.comp.Attr.visitExec(Attr.java:2354)
at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1648)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:676)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:750)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStats(Attr.java:769)
at jdk.compiler/com.sun.tools.javac.comp.Attr.visitBlock(Attr.java:1453)
at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCBlock.accept(JCTree.java:1137)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:676)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:750)
at jdk.compiler/com.sun.tools.javac.comp.Attr.visitMethodDef(Attr.java:1242)
at jdk.compiler/com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:961)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribTree(Attr.java:676)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribStat(Attr.java:750)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribClassBody(Attr.java:5632)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribClass(Attr.java:5520)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attribClass(Attr.java:5344)
at jdk.compiler/com.sun.tools.javac.comp.Attr.attrib(Attr.java:5281)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.attribute(JavaCompiler.java:1356)
at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:978)
at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:319)
at jdk.compiler/com.sun.tools.javac.main.Main.compile(Main.java:178)
at jdk.compiler/com.sun.tools.javac.Main.compile(Main.java:66)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at org.apache.tools.ant.taskdefs.compilers.Javac13.execute(Javac13.java:57)
at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:1352)
at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:1092)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:299)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
at org.apache.tools.ant.Task.perform(Task.java:350)
at org.apache.tools.ant.Target.execute(Target.java:449)
at org.apache.tools.ant.Target.performTasks(Target.java:470)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1401)
at org.apache.tools.ant.Project.executeTarget(Project.java:1374)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1264)
at org.apache.tools.ant.Main.runBuild(Main.java:818)
at org.apache.tools.ant.Main.startAnt(Main.java:223)
at org.apache.tools.ant.Main.start(Main.java:190)
at org.apache.tools.ant.Main.main(Main.java:274)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.intellij.rt.ant.execution.AntMain2.main(AntMain2.java:31)


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Javac compiles the code without error or gives specific diagnostics and aborts.
ACTUAL -
Internal compiler error