RESOLVED FIXED305791
REGRESSION(305823@main): Cannot build WeakPtr API tests with Clang 18 
https://bugs.webkit.org/show_bug.cgi?id=305791
Summary REGRESSION(305823@main): Cannot build WeakPtr API tests with Clang 18
Adrian Perez
Reported 2026-01-19 14:12:50 PST
There's a number of errors similar to the following: ../../../Tools/TestWebKitAPI/Tests/WTF/WeakPtr.cpp:366:17: error: alias template 'WeakPtr' requires template arguments; argument deduction only allowed for class templates 366 | WeakPtr derivedWeakPtr { derived }; | ^ ../../../Tools/TestWebKitAPI/Tests/WTF/WeakPtr.cpp:91:22: note: template is declared here 91 | template<typename T> using WeakPtr = WTF::WeakPtr<T, WeakPtrImplWithCounter>; | ^ We can add the template parameter explicitly to get those to build. The issue seems to be with the local WeakPtr type alias, which is declared with “using”.
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Add attachment proposed patch, testcase, etc.
Adrian Perez
Comment 1 2026-01-19 14:16:23 PST
Pull request: https://github.com/WebKit/WebKit/pull/56854
EWS
Comment 2 2026-01-19 15:18:46 PST
Committed 305836@main (553115957809): <https://commits.webkit.org/305836@main> Reviewed commits have been landed. Closing PR #56854 and removing active labels.
Radar WebKit Bug Importer
Comment 3 2026-01-19 15:19:13 PST
<rdar://problem/168466137>
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