Fixed partial resolve for default parameter values

idea/idea-analysis/src/org/jetbrains/kotlin/idea/project/ResolveElementCache.kt

@@ -61,20 +61,19 @@ public class ResolveElementCache(resolveSession: ResolveSession, private val pro
         if (bodyResolveMode != BodyResolveMode.FULL && !hasElementAdditionalResolveCached(resolveElement) && resolveElement is JetDeclaration) {
             if (bodyResolveMode == BodyResolveMode.PARTIAL) {
                 val statementToResolve = PartialBodyResolveFilter.findStatementToResolve(contextElement, resolveElement)
-                if (statementToResolve != null) {
-                    val map = partialBodyResolveCache.getValue()
-                    map[statementToResolve]?.let { return it }
+                val map = partialBodyResolveCache.getValue()
+                map[statementToResolve ?: resolveElement]?.let { return it }
 
-                    val (bindingContext, statementFilter) = performElementAdditionalResolve(resolveElement, statementToResolve, BodyResolveMode.PARTIAL)
+                val (bindingContext, statementFilter) = performElementAdditionalResolve(resolveElement, contextElement, BodyResolveMode.PARTIAL)
 
-                    for (statement in (statementFilter as PartialBodyResolveFilter).allStatementsToResolve) {
-                        if (!map.containsKey(statement)) {
-                            map[statement] = bindingContext
-                        }
+                for (statement in (statementFilter as PartialBodyResolveFilter).allStatementsToResolve) {
+                    if (!map.containsKey(statement)) {
+                        map[statement] = bindingContext
                     }
-
-                    return bindingContext
                 }
+                map[resolveElement] = bindingContext // we use the whole declaration key in the map to obtain resolve not inside any block (e.g. default parameter values)
+
+                return bindingContext
             }
             else {
                 return performElementAdditionalResolve(resolveElement, contextElement, bodyResolveMode).first

idea/tests/org/jetbrains/kotlin/idea/ResolveElementCacheTest.kt

@@ -29,7 +29,7 @@ public class ResolveElementCacheTest : JetLightCodeInsightFixtureTestCase() {
     private val FILE_TEXT =
 """
 class C {
-    fun a() {
+    fun a(p: Int = 0) {
         b(1, 2)
         val x = c()
         d(x)
@@ -144,4 +144,16 @@ class C {
             assert(bindingContext3 !== bindingContext1)
         }
     }
+
+    public fun testPartialResolveCachedForDefaultParameterValue() {
+        doTest {
+            val defaultValue = (members[0] as JetNamedFunction).getValueParameters()[0].getDefaultValue()
+            val bindingContext1 = defaultValue!!.analyze(BodyResolveMode.PARTIAL)
+            val bindingContext2 = defaultValue.analyze(BodyResolveMode.PARTIAL)
+            assert(bindingContext1 === bindingContext2)
+
+            val bindingContext3 = statements[0].analyze(BodyResolveMode.PARTIAL)
+            assert(bindingContext3 !== bindingContext2)
+        }
+    }
 }