Consider the following code:
```
fun test(a: List<String>) {
a.first()
}
```
The dispatch receiver type of `first` in this case is `List<T>` before
this change. After this change, it's `List<String>`.
In addition, this change also replace the dispatch receiver type with
the more specific type if available. For example, consider the following
```
class MyList: ArrayList<String>()
fun test(a: MyList) {
a.get(0)
}
```
The dispatch receiver type of `get` is `MyList`, instead of
`ArrayList<String>`. That is, a fake override is created in this case.
Various HL API needs to create fake override for symbols in libraries.
Without module data it may fail. Following exception is an example:
java.lang.IllegalStateException: Module data is not registered in Libraries session
at org.jetbrains.kotlin.fir.FirModuleDataKt.getModuleData(FirModuleData.kt:80)
at org.jetbrains.kotlin.fir.scopes.impl.FirFakeOverrideGenerator.createCopyForFirProperty(FirFakeOverrideGenerator.kt:297)
at org.jetbrains.kotlin.fir.scopes.impl.FirFakeOverrideGenerator.createCopyForFirProperty$default(FirFakeOverrideGenerator.kt:281)
at org.jetbrains.kotlin.fir.scopes.impl.FirFakeOverrideGenerator.createSubstitutionOverrideProperty(FirFakeOverrideGenerator.kt:271)
at org.jetbrains.kotlin.fir.scopes.impl.FirFakeOverrideGenerator.createSubstitutionOverrideProperty$default(FirFakeOverrideGenerator.kt:254)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassSubstitutionScope.createSubstitutionOverrideProperty(FirClassSubstitutionScope.kt:211)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassSubstitutionScope.access$createSubstitutionOverrideProperty(FirClassSubstitutionScope.kt:30)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassSubstitutionScope$processPropertiesByName$1.invoke(FirClassSubstitutionScope.kt:84)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassSubstitutionScope$processPropertiesByName$1.invoke(FirClassSubstitutionScope.kt:81)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassUseSiteMemberScope$processPropertiesByName$1.invoke(FirClassUseSiteMemberScope.kt:32)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassUseSiteMemberScope$processPropertiesByName$1.invoke(FirClassUseSiteMemberScope.kt:25)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassDeclaredMemberScope.processPropertiesByName(FirClassDeclaredMemberScope.kt:115)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassUseSiteMemberScope.processPropertiesByName(FirClassUseSiteMemberScope.kt:25)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassSubstitutionScope.processPropertiesByName(FirClassSubstitutionScope.kt:81)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassUseSiteMemberScope.computeDirectOverridden(FirClassUseSiteMemberScope.kt:45)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassUseSiteMemberScope.access$computeDirectOverridden(FirClassUseSiteMemberScope.kt:17)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassUseSiteMemberScope$processPropertiesByName$1.invoke(FirClassUseSiteMemberScope.kt:28)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassUseSiteMemberScope$processPropertiesByName$1.invoke(FirClassUseSiteMemberScope.kt:25)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassDeclaredMemberScope.processPropertiesByName(FirClassDeclaredMemberScope.kt:115)
at org.jetbrains.kotlin.fir.scopes.impl.FirClassUseSiteMemberScope.processPropertiesByName(FirClassUseSiteMemberScope.kt:25)
at org.jetbrains.kotlin.idea.frontend.api.fir.components.KtFirSymbolDeclarationOverridesProvider.processCallableByName(KtFirSymbolDeclarationOverridesProvider.kt:58)
at org.jetbrains.kotlin.idea.frontend.api.fir.components.KtFirSymbolDeclarationOverridesProvider.access$processCallableByName(KtFirSymbolDeclarationOverridesProvider.kt:29)
at org.jetbrains.kotlin.idea.frontend.api.fir.components.KtFirSymbolDeclarationOverridesProvider$getDirectlyOverriddenSymbols$$inlined$processOverrides$1.invoke(FirRefWithValidityCheck.kt:105)
at org.jetbrains.kotlin.idea.frontend.api.fir.components.KtFirSymbolDeclarationOverridesProvider$getDirectlyOverriddenSymbols$$inlined$processOverrides$1.invoke(FirRefWithValidityCheck.kt:33)
at org.jetbrains.kotlin.idea.fir.low.level.api.api.LowLevelFirApiFacadeKt.withFirDeclaration(LowLevelFirApiFacade.kt:129)
at org.jetbrains.kotlin.idea.frontend.api.fir.components.KtFirSymbolDeclarationOverridesProvider.getDirectlyOverriddenSymbols(KtFirSymbolDeclarationOverridesProvider.kt:253)
at org.jetbrains.kotlin.idea.frontend.api.components.KtSymbolDeclarationOverridesProviderMixIn$DefaultImpls.getDirectlyOverriddenSymbols(KtSymbolDeclarationOverridesProvider.kt:45)
at org.jetbrains.kotlin.idea.frontend.api.KtAnalysisSession.getDirectlyOverriddenSymbols(KtAnalysisSession.kt:29)
at org.jetbrains.kotlin.idea.completion.weighers.CallableWeigher.addWeight(CallableWeigher.kt:28)
at org.jetbrains.kotlin.idea.completion.weighers.Weighers.applyWeighsToLookupElement(Weighers.kt:61)
at org.jetbrains.kotlin.idea.completion.contributors.FirCompletionContributorBase.applyWeighers(FirCompletionContributorBase.kt:115)
at org.jetbrains.kotlin.idea.completion.contributors.FirCompletionContributorBase.addCallableSymbolToCompletion(FirCompletionContributorBase.kt:101)
at org.jetbrains.kotlin.idea.completion.contributors.FirCallableCompletionContributor.collectDotCompletionForCallableReceiver(FirCallableCompletionContributor.kt:189)
at org.jetbrains.kotlin.idea.completion.contributors.FirCallableCompletionContributor.collectDotCompletion(FirCallableCompletionContributor.kt:145)
at org.jetbrains.kotlin.idea.completion.contributors.FirCallableCompletionContributor.complete(FirCallableCompletionContributor.kt:79)
at org.jetbrains.kotlin.idea.completion.contributors.FirCallableCompletionContributor.complete(FirCallableCompletionContributor.kt:31)
at org.jetbrains.kotlin.idea.completion.contributors.FirCompletionContributorBaseKt.complete(FirCompletionContributorBase.kt:124)
at org.jetbrains.kotlin.idea.completion.Completions.complete(Completions.kt:18)
at org.jetbrains.kotlin.idea.completion.KotlinFirCompletionProvider.complete(KotlinFirCompletionContributor.kt:81)
at org.jetbrains.kotlin.idea.completion.KotlinFirCompletionProvider.addCompletions(KotlinFirCompletionContributor.kt:70)
at com.intellij.codeInsight.completion.CompletionProvider.addCompletionVariants(CompletionProvider.java:34)
at com.intellij.codeInsight.completion.CompletionContributor.fillCompletionVariants(CompletionContributor.java:156)
at com.intellij.codeInsight.completion.CompletionService.getVariantsFromContributors(CompletionService.java:77)
at com.intellij.codeInsight.completion.CompletionService.getVariantsFromContributors(CompletionService.java:60)
at com.intellij.codeInsight.completion.CompletionService.performCompletion(CompletionService.java:133)
at com.intellij.codeInsight.completion.BaseCompletionService.performCompletion(BaseCompletionService.java:41)
at com.intellij.codeInsight.completion.CompletionProgressIndicator.lambda$calculateItems$12(CompletionProgressIndicator.java:863)
at com.intellij.util.indexing.FileBasedIndex.lambda$ignoreDumbMode$0(FileBasedIndex.java:163)
at com.intellij.openapi.util.RecursionManager$1.computePreventingRecursion(RecursionManager.java:111)
at com.intellij.util.indexing.FileBasedIndexEx.ignoreDumbMode(FileBasedIndexEx.java:588)
at com.intellij.util.indexing.FileBasedIndex.ignoreDumbMode(FileBasedIndex.java:162)
at com.intellij.util.indexing.DumbModeAccessType.ignoreDumbMode(DumbModeAccessType.java:43)
at com.intellij.codeInsight.completion.CompletionProgressIndicator.calculateItems(CompletionProgressIndicator.java:859)
at com.intellij.codeInsight.completion.CompletionProgressIndicator.runContributors(CompletionProgressIndicator.java:847)
at com.intellij.codeInsight.completion.CodeCompletionHandlerBase.lambda$startContributorThread$6(CodeCompletionHandlerBase.java:353)
at com.intellij.codeInsight.completion.AsyncCompletion.lambda$tryReadOrCancel$5(CompletionThreading.java:172)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1078)
at com.intellij.codeInsight.completion.AsyncCompletion.tryReadOrCancel(CompletionThreading.java:170)
at com.intellij.codeInsight.completion.CodeCompletionHandlerBase.lambda$startContributorThread$7(CodeCompletionHandlerBase.java:345)
at com.intellij.codeInsight.completion.AsyncCompletion.lambda$startThread$0(CompletionThreading.java:95)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:183)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:705)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:647)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:63)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:170)
at com.intellij.codeInsight.completion.AsyncCompletion.lambda$startThread$1(CompletionThreading.java:91)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:265)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:264)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java)
Nikolay Lunyak