https://issues.dlang.org/show_bug.cgi?id=24718
--- Comment #1 from Steven Schveighoffer <[email protected]> --- >From the forum post: https://forum.dlang.org/post/[email protected] /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/mach/vm_types.h(168): Error: variable `lib_test.mach_vm_range_recipe_v1_t.range` - no definition of struct `mach_vm_range` /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/mach/vm_types.h(168): see https://dlang.org/spec/struct.html#opaque_struct_unions /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/mach/vm_types.h(168): perhaps declare a variable with pointer type `mach_vm_range*` instead This is actually the error I encountered as well. I wanted to put it in a comment so those looking for the error will find this issue. I boiled the problem down to this simple reproduction. --
