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

runtime/vm/stub_code.h

Index: runtime/vm/stub_code.h
diff --git a/runtime/vm/stub_code.h b/runtime/vm/stub_code.h
index c179cacf8a939b5a045690e98ba8fa00f84758a9..bda3ba014f8b31212be8d352e64dbaf0a2435f83 100644
--- a/runtime/vm/stub_code.h
+++ b/runtime/vm/stub_code.h
@@ -45,7 +45,8 @@ class Deserializer;
   V(MegamorphicCall)                                                           \
   V(FixAllocationStubTarget)                                                   \
   V(Deoptimize)                                                                \
-  V(DeoptimizeLazy)                                                            \
+  V(DeoptimizeLazyFromReturn)                                                  \
+  V(DeoptimizeLazyFromThrow)                                                   \
   V(UnoptimizedIdenticalWithNumberCheck)                                       \
   V(OptimizedIdenticalWithNumberCheck)                                         \
   V(ICCallBreakpoint)                                                          \
@@ -73,7 +74,8 @@ class Deserializer;
   V(LazyCompile)                                                               \
   V(FixCallersTarget)                                                          \
   V(Deoptimize)                                                                \
-  V(DeoptimizeLazy)                                                            \
+  V(DeoptimizeLazyFromReturn)                                                  \
+  V(DeoptimizeLazyFromThrow)                                                   \
   V(FrameAwaitingMaterialization)                                              \
 
 #endif  // !defined(TARGET_ARCH_DBC)
@@ -194,7 +196,8 @@ class StubCode : public AllStatic {
 
 
 enum DeoptStubKind {
-  kLazyDeopt,
+  kLazyDeoptFromReturn,
+  kLazyDeoptFromThrow,
   kEagerDeopt
 };