Bug 1574552 - Push float/abs.pos. CB for 'block ruby' as needed. r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D42701

--HG--
extra : moz-landing-system : lando

layout/base/nsCSSFrameConstructor.cpp

@@ -3202,6 +3202,18 @@ nsIFrame* nsCSSFrameConstructor::ConstructBlockRubyFrame(
     SetRootElementFrameAndConstructCanvasAnonContent(newFrame, aState,
                                                      aFrameList);
   }
+
+  nsFrameConstructorSaveState absoluteSaveState;
+  blockFrame->AddStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN);
+  if (aStyleDisplay->IsAbsPosContainingBlock(newFrame)) {
+    aState.PushAbsoluteContainingBlock(blockFrame, blockFrame,
+                                       absoluteSaveState);
+  }
+  nsFrameConstructorSaveState floatSaveState;
+  if (blockFrame->IsFloatContainingBlock()) {
+    aState.PushFloatContainingBlock(blockFrame, floatSaveState);
+  }
+
   nsFrameList childList;
   ProcessChildren(aState, content, rubyStyle, rubyFrame, true, childList, false,
                   nullptr);

layout/generic/crashtests/1574552.html

@@ -0,0 +1,6 @@
+<style>
+* { float: right }
+</style>
+<ruby>
+<table>
+A

layout/generic/crashtests/crashtests.list

@@ -736,3 +736,4 @@ load 1346454-2.html
 load 1555142.html
 load 1562105.html
 load 1571460.html
+load 1574552.html