src/jdk.dynalink/share/classes/jdk/dynalink/linker/GuardedInvocation.java

*** 200,209 ****
--- 200,212 ----
       */
      public GuardedInvocation(final MethodHandle invocation, final MethodHandle guard, final SwitchPoint switchPoint, final Class<? extends Throwable> exception) {
          this.invocation = Objects.requireNonNull(invocation);
          this.guard = guard;
          this.switchPoints = switchPoint == null ? null : new SwitchPoint[] { switchPoint };
+         if (exception != null && !Throwable.class.isAssignableFrom(exception)) {
+             throw new IllegalArgumentException(exception.getName() + " is not assignable from Throwable");
+         }
          this.exception = exception;
      }
  
      /**
       * Creates a new guarded invocation, with a guard method handle, any number
*** 226,235 ****
--- 229,241 ----
       */
      public GuardedInvocation(final MethodHandle invocation, final MethodHandle guard, final SwitchPoint[] switchPoints, final Class<? extends Throwable> exception) {
          this.invocation = Objects.requireNonNull(invocation);
          this.guard = guard;
          this.switchPoints = switchPoints == null ? null : switchPoints.clone();
+         if (exception != null && !Throwable.class.isAssignableFrom(exception)) {
+             throw new IllegalArgumentException(exception.getName() + " is not assignable from Throwable");
+         }
          this.exception = exception;
      }
  
      /**
       * Returns the invocation method handle.