From: Adrian Perez de Castro <aperez@igalia.com>
Date: Mon, 26 Aug 2024 15:14:46 +0000 (+0200)
Subject: Fix crash when compiled with Clang with LTO enabled
X-Git-Tag: archive/raspbian/2.48.1-2+rpi1~1^2^2^2^2^2^2^2^2^2~1
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=17bde264620a900d876206d3537d5979791bf978;p=wpewebkit.git

Fix crash when compiled with Clang with LTO enabled

Bug: https://bugs.webkit.org/show_bug.cgi?id=274780
Origin: https://github.com/WebKit/WebKit/commit/4854b944b345990e4100319662777856fe8ea4aa

===================================================================

Gbp-Pq: Name fix-clang-build.patch
---

diff --git a/Source/WebCore/rendering/TextDecorationPainter.cpp b/Source/WebCore/rendering/TextDecorationPainter.cpp
index 229857f64..a58bbd86f 100644
--- a/Source/WebCore/rendering/TextDecorationPainter.cpp
+++ b/Source/WebCore/rendering/TextDecorationPainter.cpp
@@ -140,8 +140,10 @@ static DashArray translateIntersectionPointsToSkipInkBoundaries(const DashArray&
             else
                 intermediateTuples.append(*i);
         }
-    } else
-        intermediateTuples = tuples;
+    } else {
+        // XXX(274780): A plain assignment or move here makes Clang generate bad code in LTO builds.
+        intermediateTuples.swap(tuples);
+    }
 
     // Step 3: Output the space between the ranges, but only if the space warrants an underline.
     float previous = 0;