take correct parameter names from debug info for long/double parameters (IDEA-53195)

java/java-impl/src/com/intellij/psi/impl/compiled/ClsStubBuilder.java

@@ -598,6 +598,8 @@ public class ClsStubBuilder {
     private final int myIgnoreCount;
     private final int myParamCount;
     private final PsiParameterStubImpl[] myParamStubs;
+    private int myUsedParamSize = 0;
+    private int myUsedParamCount = 0;
 
     private AnnotationParamCollectingVisitor(final StubElement owner, final PsiModifierListStub modList, int ignoreCount, int paramCount,
                                              PsiParameterStubImpl[] paramStubs) {
@@ -609,11 +611,21 @@ public class ClsStubBuilder {
 
     @Override
     public void visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) {
-      if (index >= myIgnoreCount && index < myIgnoreCount + myParamCount) {
-        PsiParameterStubImpl parameterStub = myParamStubs[index - myIgnoreCount];
+      if (index >= myIgnoreCount) {
+        // long and double variables increase the index by 2, not by 1
+        int paramIndex = (index - myIgnoreCount == myUsedParamSize) ? myUsedParamCount : index - myIgnoreCount;
+        if (paramIndex >= myParamCount) return;
+        PsiParameterStubImpl parameterStub = myParamStubs[paramIndex];
         if (parameterStub != null) {
           parameterStub.setName(name);
         }
+        myUsedParamCount = paramIndex+1;
+        if ("D".equals(desc) || "J".equals(desc)) {
+          myUsedParamSize += 2;
+        }
+        else {
+          myUsedParamSize++;
+        }
       }
     }
   }

java/java-tests/testData/psi/cls/stubBuilder/DoubleTest.txt

@@ -0,0 +1,22 @@
+PsiJavaFileStub []
+  PsiClassStub[name=DoubleTest fqn=DoubleTest]
+    PsiModifierListStub[mask=9]
+    PsiTypeParameterListStub
+    PsiRefListStub[EXTENDS_LIST:]
+    PsiRefListStub[IMPLEMENTS_LIST:]
+    PsiMethodStub[cons DoubleTest:void]
+      PsiModifierListStub[mask=1]
+      PsiTypeParameterListStub
+      PsiParameterListStub
+      PsiRefListStub[THROWS_LIST:]
+    PsiMethodStub[foo:void]
+      PsiModifierListStub[mask=4096]
+      PsiTypeParameterListStub
+      PsiParameterListStub
+        PsiParameterStub[one:double]
+          PsiModifierListStub[mask=0]
+        PsiParameterStub[two:double]
+          PsiModifierListStub[mask=0]
+        PsiParameterStub[three:double]
+          PsiModifierListStub[mask=0]
+      PsiRefListStub[THROWS_LIST:]

java/java-tests/testSrc/com/intellij/psi/ClsBuilderTest.java

@@ -52,9 +52,17 @@ public class ClsBuilderTest extends LightIdeaTestCase {
   }
 
   public void testTestSuite() throws Exception {
-    final String clsFilePath = JavaTestUtil.getJavaTestDataPath() + "/psi/cls/stubBuilder/TestSuite.class";
+    doTestFromTestData();
+  }
+
+  public void testDoubleTest() throws Exception {  // IDEA-53195
+    doTestFromTestData();
+  }
+
+  private void doTestFromTestData() throws ClsFormatException, IOException {
+    final String clsFilePath = JavaTestUtil.getJavaTestDataPath() + "/psi/cls/stubBuilder/" + getTestName(false) + ".class";
     VirtualFile clsFile = LocalFileSystem.getInstance().findFileByPath(clsFilePath);
-    doTest(clsFile, "TestSuite.txt");
+    doTest(clsFile, getTestName(false) + ".txt");
   }
 
   private void doTest(final String classname) throws IOException, ClsFormatException {

java/testFramework/src/com/intellij/testFramework/LightIdeaTestCase.java

@@ -33,6 +33,9 @@ import org.jetbrains.annotations.NonNls;
  */
 @SuppressWarnings({"HardCodedStringLiteral"})
 @NonNls public class LightIdeaTestCase extends LightPlatformTestCase {
+  public LightIdeaTestCase() {
+    IdeaTestCase.initPlatformPrefix();
+  }
 
   public static JavaPsiFacadeEx getJavaFacade() {
     return JavaPsiFacadeEx.getInstanceEx(ourProject);