Fix the build after the rebase

The rebase onto a later git master lldb required a change to
RustASTContext.

Author: tromey

lldb/include/lldb/Symbol/RustASTContext.h

@@ -268,7 +268,8 @@ class RustASTContext : public TypeSystem {
   lldb::Format GetFormat(lldb::opaque_compiler_type_t type) override;
 
   uint32_t GetNumChildren(lldb::opaque_compiler_type_t type,
-                          bool omit_empty_base_classes) override;
+                          bool omit_empty_base_classes,
+                          const ExecutionContext *exe_ctx) override;
 
   lldb::BasicType
   GetBasicTypeEnumeration(lldb::opaque_compiler_type_t type) override;

lldb/source/Symbol/RustASTContext.cpp

@@ -1407,22 +1407,23 @@ size_t RustASTContext::GetTypeBitAlign(lldb::opaque_compiler_type_t type) {
 }
 
 uint32_t RustASTContext::GetNumChildren(lldb::opaque_compiler_type_t type,
-                                        bool omit_empty_base_classes) {
+                                        bool omit_empty_base_classes,
+                                        const ExecutionContext *exe_ctx) {
   if (!type)
     return 0;
 
   RustType *t = static_cast<RustType *>(type);
   uint32_t result = 0;
   if (RustPointer *ptr = t->AsPointer()) {
-    result = ptr->PointeeType().GetNumChildren(omit_empty_base_classes);
+    result = ptr->PointeeType().GetNumChildren(omit_empty_base_classes, exe_ctx);
     // If the pointee is not an aggregate, return 1 because the
     // pointer has a child.  Not totally sure this makes sense.
     if (result == 0)
       result = 1;
   } else if (RustArray *array = t->AsArray()) {
     result = array->Length();
   } else if (RustTypedef *typ = t->AsTypedef()) {
-    result = typ->UnderlyingType().GetNumChildren(omit_empty_base_classes);
+    result = typ->UnderlyingType().GetNumChildren(omit_empty_base_classes, exe_ctx);
   } else if (RustAggregateBase *agg = t->AsAggregate()) {
     result = agg->FieldCount();
   }