intersect thrown types when implementing 2 interfaces with same method signature (IDEA-82426)

java/java-tests/testData/codeInsight/overrideImplement/beforeMultipleInheritanceWithThrowables.java

@@ -0,0 +1,13 @@
+interface A {
+    void a() throws java.io.IOException;
+}
+
+interface B {
+    void a() throws InstantiationException;
+}
+
+interface C extends A, B {}
+
+class D implements C {
+    <caret>
+}