[Webkit-unassigned] [Bug 212120] WebProcessPool::startDisplayLink() is often called with a displayID of 0
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Tue May 19 20:32:15 PDT 2020
https://bugs.webkit.org/show_bug.cgi?id=212120
--- Comment #1 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
diff --git a/Source/WebKit/UIProcess/mac/DisplayLink.cpp b/Source/WebKit/UIProcess/mac/DisplayLink.cpp
index 9f0c10181957ca4dec980191a4647ad4123c5d08..169c4ed6f8ee5d38313f46eb7e08026d884b59d7 100644
--- a/Source/WebKit/UIProcess/mac/DisplayLink.cpp
+++ b/Source/WebKit/UIProcess/mac/DisplayLink.cpp
@@ -36,6 +36,7 @@ namespace WebKit {
DisplayLink::DisplayLink(WebCore::PlatformDisplayID displayID)
: m_displayID(displayID)
{
+ ASSERT(displayID);
ASSERT(hasProcessPrivilege(ProcessPrivilege::CanCommunicateWithWindowServer));
CVReturn error = CVDisplayLinkCreateWithCGDisplay(displayID, &m_displayLink);
if (error) {
--
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