diff --git a/pkg/analyzer_plugin/lib/src/utilities/completion/completion_target.dart b/pkg/analyzer_plugin/lib/src/utilities/completion/completion_target.dart
index bb03fc8..77ea08e 100644
--- a/pkg/analyzer_plugin/lib/src/utilities/completion/completion_target.dart
+++ b/pkg/analyzer_plugin/lib/src/utilities/completion/completion_target.dart
@@ -262,6 +262,7 @@
         return node.prefix;
       }
     }
+    return null;
   }
 
   /// If the target is an argument in an argument list, and the invocation is
diff --git a/runtime/vm/virtual_memory_posix.cc b/runtime/vm/virtual_memory_posix.cc
index b2717df..72235ff 100644
--- a/runtime/vm/virtual_memory_posix.cc
+++ b/runtime/vm/virtual_memory_posix.cc
@@ -138,7 +138,7 @@
         nullptr, PROT_NONE, allocated_size, kCompressedHeapPageSize,
         allocated_size + kCompressedHeapPageSize,
         MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE);
-    if (address == MAP_FAILED) continue;
+    if (address == nullptr) continue;
 
     MemoryRegion region(address, allocated_size);
     region = ClipToAlignedRegion(region, kCompressedHeapAlignment);
diff --git a/tools/VERSION b/tools/VERSION
index e066e6c..527e3b1 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@
 MAJOR 2
 MINOR 16
 PATCH 0
-PRERELEASE 87
+PRERELEASE 88
 PRERELEASE_PATCH 0
\ No newline at end of file