From c73599d64eb8ccdc14aeb865f2ef97b9fccd11b0 Mon Sep 17 00:00:00 2001
From: malte_langkabel <malte.langkabel@gmail.com>
Date: Mon, 23 Jan 2017 16:51:31 +0100
Subject: [PATCH] logic: avoided triggering clang assertion when indexing
 lambda with return type that is specified but has neither declaration nor
 definition. (issue #318)

---
 .../cxx/name_resolver/CxxDeclNameResolver.cpp      | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/lib_cxx/data/parser/cxx/name_resolver/CxxDeclNameResolver.cpp b/src/lib_cxx/data/parser/cxx/name_resolver/CxxDeclNameResolver.cpp
index 623e76b9..3192167b 100644
--- a/src/lib_cxx/data/parser/cxx/name_resolver/CxxDeclNameResolver.cpp
+++ b/src/lib_cxx/data/parser/cxx/name_resolver/CxxDeclNameResolver.cpp
@@ -44,7 +44,19 @@ std::shared_ptr<CxxDeclName> CxxDeclNameResolver::getName(const clang::NamedDecl
 		(clang::isa<clang::CXXRecordDecl>(declaration)) &&
 		(clang::dyn_cast<clang::CXXRecordDecl>(declaration)->isLambda()))
 	{
-		declaration = clang::dyn_cast<clang::CXXRecordDecl>(declaration)->getLambdaCallOperator();
+		// avoid triggering assert
+		clang::DeclarationName Name =
+			clang::dyn_cast<clang::CXXRecordDecl>(declaration)->getASTContext().DeclarationNames.getCXXOperatorName(clang::OO_Call);
+		clang::DeclContext::lookup_result Calls = clang::dyn_cast<clang::CXXRecordDecl>(declaration)->lookup(Name);
+		if (Calls.empty())
+		{
+			declaration = nullptr;
+			declName = std::make_shared<CxxDeclName>("unsolved-lambda", std::vector<std::string>());
+		}
+		else
+		{
+			declaration = clang::dyn_cast<clang::CXXRecordDecl>(declaration)->getLambdaCallOperator();
+		}
 	}
 
 	if (declaration)