Fix a throw returning to a frame marked for lazy deopt that captures the stacktrace.

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index a7b42bb3cd2b9ea37e01bb655e0a1c291f47cb69..3ce365b96662065012a4b1ecf914430e50fa86dd 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -4922,7 +4922,8 @@ class Code : public Object {
     kInvalidPc = -1
   };
 
-  uword GetLazyDeoptPc() const;
+  uword GetLazyDeoptReturnPc() const;
+  uword GetLazyDeoptThrowPc() const;
 
   // Find pc, return 0 if not found.
   uword GetPcForDeoptId(intptr_t deopt_id, RawPcDescriptors::Kind kind) const;
@@ -4939,18 +4940,32 @@ class Code : public Object {
 #endif
   }
 
-  intptr_t lazy_deopt_pc_offset() const {
+  intptr_t lazy_deopt_return_pc_offset() const {
 #if defined(DART_PRECOMPILED_RUNTIME)
     return 0;
 #else
-    return raw_ptr()->lazy_deopt_pc_offset_;
+    return raw_ptr()->lazy_deopt_return_pc_offset_;
 #endif
   }
-  void set_lazy_deopt_pc_offset(intptr_t pc) const {
+  void set_lazy_deopt_return_pc_offset(intptr_t pc) const {
 #if defined(DART_PRECOMPILED_RUNTIME)
     UNREACHABLE();
 #else
-    StoreNonPointer(&raw_ptr()->lazy_deopt_pc_offset_, pc);
+    StoreNonPointer(&raw_ptr()->lazy_deopt_return_pc_offset_, pc);
+#endif
+  }
+  intptr_t lazy_deopt_throw_pc_offset() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return 0;
+#else
+    return raw_ptr()->lazy_deopt_throw_pc_offset_;
+#endif
+  }
+  void set_lazy_deopt_throw_pc_offset(intptr_t pc) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
+    StoreNonPointer(&raw_ptr()->lazy_deopt_throw_pc_offset_, pc);
 #endif
   }