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layout_thread: Avoid adding the UA sheets multiple times when there's no root flow.
Fixes #18631
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3 changed files with 27 additions and 2 deletions
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@ -1318,6 +1318,7 @@ impl LayoutThread {
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&mut layout_context);
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}
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self.first_reflow.set(false);
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self.respond_to_query_if_necessary(&data.reflow_goal,
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&mut *rw_data,
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&mut layout_context,
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@ -1618,8 +1619,6 @@ impl LayoutThread {
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&mut *layout_context,
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rw_data);
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self.first_reflow.set(false);
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if opts::get().trace_layout {
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layout_debug::end_trace(self.generation.get());
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}
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@ -14546,6 +14546,12 @@
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{}
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]
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],
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"mozilla/first-reflow-sheet-assert.html": [
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[
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"/_mozilla/mozilla/first-reflow-sheet-assert.html",
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{}
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]
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],
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"mozilla/focus_blur.html": [
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[
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"/_mozilla/mozilla/focus_blur.html",
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@ -27925,6 +27931,10 @@
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"f2ec5f89521fb4eda64a5e70249bbfb8850c4278",
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"testharness"
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],
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"mozilla/first-reflow-sheet-assert.html": [
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"8a0cf9152c3f2421d3e418f824f02c915092d78f",
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"testharness"
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],
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"mozilla/focus_blur.html": [
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"2735c5c482e38743b0976789af858075c54408c1",
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"testharness"
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@ -0,0 +1,16 @@
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<!doctype html>
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<meta charset="utf-8">
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<title>Issue 18631: Assertion failure when double-adding the UA sheets to the page</title>
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<style>
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* { display: none }
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</style>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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// Trigger two forced reflows.
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test(function() {
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document.documentElement.offsetTop;
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document.documentElement.offsetTop;
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assert_true(true, "Didn't assert");
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}, "Passes if it doesn't assert");
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</script>
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