[inspector] fixed taskHeapSnapshot on pause

src/profiler/heap-snapshot-generator.cc

Index: src/profiler/heap-snapshot-generator.cc
diff --git a/src/profiler/heap-snapshot-generator.cc b/src/profiler/heap-snapshot-generator.cc
index 0a9fb03226b61013c8c0f04103ded28bc43ef206..df8167310fb1d261c4d46d915cf8730f8cd4c7bd 100644
--- a/src/profiler/heap-snapshot-generator.cc
+++ b/src/profiler/heap-snapshot-generator.cc
@@ -2492,6 +2492,20 @@ HeapSnapshotGenerator::HeapSnapshotGenerator(
       heap_(heap) {
 }
 
+namespace {
+class NullContextScope {
+ public:
+  explicit NullContextScope(Isolate* isolate)
+      : isolate_(isolate), prev_(isolate->context()) {
+    isolate_->set_context(nullptr);
+  }
+  ~NullContextScope() { isolate_->set_context(prev_); }
+
+ private:
+  Isolate* isolate_;
+  Context* prev_;
+};
+}  //  namespace
 
 bool HeapSnapshotGenerator::GenerateSnapshot() {
   v8_heap_explorer_.TagGlobalObjects();
@@ -2505,6 +2519,8 @@ bool HeapSnapshotGenerator::GenerateSnapshot() {
   heap_->CollectAllGarbage(Heap::kMakeHeapIterableMask,
                            GarbageCollectionReason::kHeapProfiler);
 
+  NullContextScope null_context_scope(heap_->isolate());
+
 #ifdef VERIFY_HEAP
   Heap* debug_heap = heap_;
   if (FLAG_verify_heap) {