227866 2021-07-11 21:23:39 -0700 [MSE] CompletionHandler may not always be called in SourceBufferPrivate::didReceiveInitializationSegment 2021-07-11 21:23:58 -0700 1 1 1 Unclassified WebKit Media WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 jean-yves.avenard webkit-unassigned webkit-bug-importer oldest_to_newest 1776254 0 jean-yves.avenard 2021-07-11 21:23:39 -0700 If the initialisation segment received in SourceBufferPrivate::didReceiveInitializationSegment is invalid; then the CompletionHandler will not be called; which would assert in the CompletionHandler destructor void SourceBufferPrivate::didReceiveInitializationSegment(SourceBufferPrivateClient::InitializationSegment&& segment, CompletionHandler<void()>&& completionHandler) { if (!m_client) { completionHandler(); return; } if (m_receivedFirstInitializationSegment && !validateInitializationSegment(segment)) { m_client->sourceBufferPrivateAppendError(true); return; } ... } if validateInitializationSegment(segment) returns false; then we will error, and return. But this would assert once completionHandler goes out of scope. 1776255 1 webkit-bug-importer 2021-07-11 21:23:58 -0700 <rdar://problem/80446981>