diff --git a/src/db/db/dbCommonReader.cc b/src/db/db/dbCommonReader.cc
index b1becdcfb..e52b94c69 100644
--- a/src/db/db/dbCommonReader.cc
+++ b/src/db/db/dbCommonReader.cc
@@ -240,7 +240,7 @@ CommonReaderBase::cell_for_instance (db::Layout &layout, const std::string &cn)
 }
 
 void
-CommonReaderBase::merge_cell (db::Layout &layout, db::cell_index_type target_cell_index, db::cell_index_type src_cell_index, bool with_meta, bool no_duplicate_instances) const
+CommonReaderBase::merge_cell (db::Layout &layout, db::cell_index_type target_cell_index, db::cell_index_type src_cell_index, bool with_meta, bool no_duplicate_instances)
 {
   const db::Cell &src_cell = layout.cell (src_cell_index);
   db::Cell &target_cell = layout.cell (target_cell_index);
@@ -284,7 +284,7 @@ CommonReaderBase::merge_cell (db::Layout &layout, db::cell_index_type target_cel
 }
 
 void
-CommonReaderBase::merge_cell_without_instances (db::Layout &layout, db::cell_index_type target_cell_index, db::cell_index_type src_cell_index, bool with_meta) const
+CommonReaderBase::merge_cell_without_instances (db::Layout &layout, db::cell_index_type target_cell_index, db::cell_index_type src_cell_index, bool with_meta)
 {
   const db::Cell &src_cell = layout.cell (src_cell_index);
   db::Cell &target_cell = layout.cell (target_cell_index);
@@ -297,20 +297,21 @@ CommonReaderBase::merge_cell_without_instances (db::Layout &layout, db::cell_ind
   }
 
   //  replace all instances of the new cell with the original one
-  layout.replace_instances_of (src_cell.cell_index (), target_cell.cell_index ());
+  layout.replace_instances_of (src_cell_index, target_cell_index);
 
   //  merge meta info
   if (with_meta) {
-    auto ib = layout.begin_meta (src_cell.cell_index ());
-    auto ie = layout.end_meta (src_cell.cell_index ());
+    auto ib = layout.begin_meta (src_cell_index);
+    auto ie = layout.end_meta (src_cell_index);
     for (auto i = ib; i != ie; ++i) {
-      layout.add_meta_info (target_cell.cell_index (), i->first, i->second);
+      layout.add_meta_info (target_cell_index, i->first, i->second);
     }
   }
-  layout.clear_meta (src_cell.cell_index ());
+  layout.clear_meta (src_cell_index);
 
   //  finally delete the new cell
-  layout.delete_cell (src_cell.cell_index ());
+  m_temp_cells.erase (src_cell_index);
+  layout.delete_cell (src_cell_index);
 }
 
 void
diff --git a/src/db/db/dbCommonReader.h b/src/db/db/dbCommonReader.h
index 1a7dafcdf..065c5eb6c 100644
--- a/src/db/db/dbCommonReader.h
+++ b/src/db/db/dbCommonReader.h
@@ -242,12 +242,12 @@ class DB_PUBLIC CommonReaderBase
   /**
    * @brief Merge (and delete) the src_cell into target_cell
    */
-  void merge_cell (db::Layout &layout, db::cell_index_type target_cell_index, db::cell_index_type src_cell_index, bool with_meta, bool no_duplicate_instances) const;
+  void merge_cell (db::Layout &layout, db::cell_index_type target_cell_index, db::cell_index_type src_cell_index, bool with_meta, bool no_duplicate_instances);
 
   /**
    * @brief Merge (and delete) the src_cell into target_cell without instances
    */
-  void merge_cell_without_instances (db::Layout &layout, db::cell_index_type target_cell_index, db::cell_index_type src_cell_index, bool with_meta) const;
+  void merge_cell_without_instances (db::Layout &layout, db::cell_index_type target_cell_index, db::cell_index_type src_cell_index, bool with_meta);
 
   /**
    *  @brief Gets the layer name map
diff --git a/src/plugins/streamers/oasis/unit_tests/dbOASISReaderTests.cc b/src/plugins/streamers/oasis/unit_tests/dbOASISReaderTests.cc
index 02d1f8a3c..7f906dcd8 100644
--- a/src/plugins/streamers/oasis/unit_tests/dbOASISReaderTests.cc
+++ b/src/plugins/streamers/oasis/unit_tests/dbOASISReaderTests.cc
@@ -679,3 +679,24 @@ TEST(DuplicateCellname)
     EXPECT_EQ (ex.msg ().find ("Same cell name TOP, but different IDs: 3 and 0 (position=1070, cell=)"), size_t (0));
   }
 }
+
+TEST(BlendCrash)
+{
+  db::Manager m (false);
+  db::Layout layout (&m);
+
+  {
+    tl::InputStream file (tl::testdata () + "/oasis/blend_crash1.oas");
+    db::OASISReader reader (file);
+    reader.read (layout);
+  }
+
+  {
+    tl::InputStream file (tl::testdata () + "/oasis/blend_crash2.oas");
+    db::OASISReader reader (file);
+    reader.read (layout);
+  }
+
+  std::string fn_au (tl::testdata () + "/oasis/blend_crash_au.gds.gz");
+  db::compare_layouts (_this, layout, fn_au, db::WriteGDS2, 1);
+}
diff --git a/testdata/oasis/blend_crash1.oas b/testdata/oasis/blend_crash1.oas
new file mode 100644
index 000000000..1d86e551f
Binary files /dev/null and b/testdata/oasis/blend_crash1.oas differ
diff --git a/testdata/oasis/blend_crash2.oas b/testdata/oasis/blend_crash2.oas
new file mode 100644
index 000000000..ccd436483
Binary files /dev/null and b/testdata/oasis/blend_crash2.oas differ
diff --git a/testdata/oasis/blend_crash_au.gds.gz b/testdata/oasis/blend_crash_au.gds.gz
new file mode 100644
index 000000000..5118f4399
Binary files /dev/null and b/testdata/oasis/blend_crash_au.gds.gz differ