2 files changed, 26 insertions, 4 deletions
diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp
index e67477440f3..92191793d19 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangASTSource.cpp
@@ -1968,7 +1968,14 @@ clang::QualType ClangASTSource::CopyTypeWithMerger(
     return QualType();
   }
 
-  return merger.ImporterForOrigin(from_context).Import(type);
+  if (llvm::Expected<QualType> type_or_error =
+          merger.ImporterForOrigin(from_context).Import(type)) {
+    return *type_or_error;
+  } else {
+    Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS);
+    LLDB_LOG_ERROR(log, type_or_error.takeError(), "Couldn't import type: {0}");
+    return QualType();
+  }
 }
 
 clang::Decl *ClangASTSource::CopyDecl(Decl *src_decl) {
@@ -1981,7 +1988,16 @@ clang::Decl *ClangASTSource::CopyDecl(Decl *src_decl) {
       return nullptr;
     }
 
-    return m_merger_up->ImporterForOrigin(from_context).Import(src_decl);
+    if (llvm::Expected<Decl *> decl_or_error =
+            m_merger_up->ImporterForOrigin(from_context).Import(src_decl)) {
+      return *decl_or_error;
+    } else {
+      Log *log =
+          lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS);
+      LLDB_LOG_ERROR(log, decl_or_error.takeError(),
+                     "Couldn't import decl: {0}");
+      return nullptr;
+    }
   } else {
     lldbassert(0 && "No mechanism for copying a decl!");
     return nullptr;
diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
index 5212712b104..83cbe517643 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionDeclMap.cpp
@@ -272,9 +272,15 @@ static clang::QualType ExportAllDeclaredTypes(
   merger.AddSources(importer_source);
   clang::ASTImporter &exporter = merger.ImporterForOrigin(source);
   CompleteAllDeclContexts(exporter, file, root);
-  clang::QualType ret = exporter.Import(root);
+  llvm::Expected<clang::QualType> ret_or_error = exporter.Import(root);
   merger.RemoveSources(importer_source);
-  return ret;
+  if (ret_or_error) {
+    return *ret_or_error;
+  } else {
+    Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS);
+    LLDB_LOG_ERROR(log, ret_or_error.takeError(), "Couldn't import type: {0}");
+    return clang::QualType();
+  }
 }
 
 TypeFromUser ClangExpressionDeclMap::DeportType(ClangASTContext &target,