diff --git a/Libraries/LibWeb/CSS/CalculatedOr.cpp b/Libraries/LibWeb/CSS/CalculatedOr.cpp
index 5eb4485ae39..f89c8a0b08c 100644
--- a/Libraries/LibWeb/CSS/CalculatedOr.cpp
+++ b/Libraries/LibWeb/CSS/CalculatedOr.cpp
@@ -89,6 +89,8 @@ bool LengthOrAutoOrCalculated::is_auto() const
LengthOrCalculated LengthOrAutoOrCalculated::without_auto() const
{
VERIFY(!is_auto());
+ if (is_calculated())
+ return calculated();
return value().length();
}
diff --git a/Tests/LibWeb/Layout/expected/crash-tests/img-with-calc-inside-sizes-attr.txt b/Tests/LibWeb/Layout/expected/crash-tests/img-with-calc-inside-sizes-attr.txt
new file mode 100644
index 00000000000..92072d06efc
--- /dev/null
+++ b/Tests/LibWeb/Layout/expected/crash-tests/img-with-calc-inside-sizes-attr.txt
@@ -0,0 +1,13 @@
+Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] children: not-inline
+ BlockContainer at [0,0] [0+0+0 800 0+0+0] [0+0+0 34 0+0+0] [BFC] children: not-inline
+ BlockContainer at [8,8] [8+0+0 784 0+0+8] [8+0+0 18 0+0+8] children: inline
+ frag 0 from ImageBox start: 0, length: 0, rect: [8,21 0x0] baseline: 0
+ ImageBox ![]()
at [8,21] [0+0+0 0 0+0+0] [0+0+0 0 0+0+0] children: not-inline
+
+ViewportPaintable (Viewport<#document>) [0,0 800x600]
+ PaintableWithLines (BlockContainer) [0,0 800x34]
+ PaintableWithLines (BlockContainer) [8,8 784x18]
+ ImagePaintable (ImageBox![]()
) [8,21 0x0]
+
+SC for Viewport<#document> [0,0 800x600] [children: 1] (z-index: auto)
+ SC for BlockContainer [0,0 800x34] [children: 0] (z-index: auto)
diff --git a/Tests/LibWeb/Layout/input/crash-tests/img-with-calc-inside-sizes-attr.html b/Tests/LibWeb/Layout/input/crash-tests/img-with-calc-inside-sizes-attr.html
new file mode 100644
index 00000000000..f9159d72237
--- /dev/null
+++ b/Tests/LibWeb/Layout/input/crash-tests/img-with-calc-inside-sizes-attr.html
@@ -0,0 +1 @@
+![]()
\ No newline at end of file