Bug 315740 – Build failure on CMake + macOS 26.4: "incomplete type 'WebKit::TextExtractionAssertionScope'"

• Status: RESOLVED
• Resolution: FIXED
• Component: Tools / Tests

[Elliott Williams]

Seems like we're missing an import that is needed when invoking swift to generate WebKit-Swift-CPP.h

[Radar WebKit Bug Importer]

<rdar://problem/178125965>

[Elliott Williams]

Full error:

```
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.4.sdk/usr/include/c++/v1/__memory/unique_ptr.h:75:19: error: invalid application of 'sizeof' to an incomplete type 'WebKit::TextExtractionAssertionScope'
 73 | 
 74 |   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void operator()(_Tp* __ptr) const _NOEXCEPT {
 75 |     static_assert(sizeof(_Tp) >= 0, "cannot delete an incomplete type");
    |                   `- error: invalid application of 'sizeof' to an incomplete type 'WebKit::TextExtractionAssertionScope'
 76 |     static_assert(!is_void<_Tp>::value, "cannot delete an incomplete type");
 77 |     delete __ptr;
    :
257 | #endif
258 | 
259 |   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 ~unique_ptr() { reset(); }
    |                                                                       `- note: in instantiation of member function 'std::unique_ptr<WebKit::TextExtractionAssertionScope>::reset' requested here
260 | 
261 |   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 unique_ptr& operator=(nullptr_t) _NOEXCEPT {
    :
288 |     __ptr_        = __p;
289 |     if (__tmp)
290 |       __deleter_(__tmp);
    |       `- note: in instantiation of member function 'std::default_delete<WebKit::TextExtractionAssertionScope>::operator()' requested here
291 |   }
292 | 

/tmp/build/WTF/Headers/wtf/UniqueRef.h:67:7: note: in instantiation of member function 'std::unique_ptr<WebKit::TextExtractionAssertionScope>::~unique_ptr' requested here
 65 | 
 66 | template<typename T>
 67 | class UniqueRef {
    |       `- note: in instantiation of member function 'std::unique_ptr<WebKit::TextExtractionAssertionScope>::~unique_ptr' requested here
 68 | public:
 69 |     template <typename U>

<unknown>:0: note: in implicit move constructor for 'WTF::UniqueRef<WebKit::TextExtractionAssertionScope>' first required here
/Users/emw/src/OpenSource/Source/WebKit/UIProcess/WebPageProxy.h:543:7: note: forward declaration of 'WebKit::TextExtractionAssertionScope'
 541 | class SuspendedPageProxy;
 542 | class SystemPreviewController;
 543 | class TextExtractionAssertionScope;
     |       `- note: forward declaration of 'WebKit::TextExtractionAssertionScope'
 544 | class UserData;
 545 | class UserMediaPermissionRequestManagerProxy;
ninja: build stopped: subcommand failed.
```

Build commands: cmake -S /Users/emw/src/OpenSource -B /tmp/build --preset mac-dev-debug && ninja -C /tmp/build

[EWS]

Committed 314024@main (707ff4ffb301): <https://commits.webkit.org/314024@main>

Reviewed commits have been landed. Closing PR #65871 and removing active labels.