Index: source/Plugins/Process/Utility/RegisterContextDarwin_arm64.cpp
===================================================================
--- source/Plugins/Process/Utility/RegisterContextDarwin_arm64.cpp
+++ source/Plugins/Process/Utility/RegisterContextDarwin_arm64.cpp
@@ -429,7 +429,7 @@
   case fpu_v29:
   case fpu_v30:
   case fpu_v31:
-    value.SetBytes(fpu.v[reg].bytes.buffer, reg_info->byte_size,
+    value.SetBytes(fpu.v[reg - fpu_v0].bytes.buffer, reg_info->byte_size,
                    endian::InlHostByteOrder());
     break;