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diff --git a/tests/spec/glsl-es-1.00/compiler/structure-and-array-operations/array-constant-index-implicit-size.vert b/tests/spec/glsl-es-1.00/compiler/structure-and-array-operations/array-constant-index-implicit-size.vert
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+++ b/tests/spec/glsl-es-1.00/compiler/structure-and-array-operations/array-constant-index-implicit-size.vert
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+/* [config]
+ * expect_result: pass
+ * glsl_version: 1.20
+ * glsles_version: 1.00
+ * [end config]
+ *
+ * From page 19 (page 25 of the PDF) of the GLSL 1.20 spec:
+ *
+ *     "If an array is indexed with an expression that is not an integral
+ *     constant expression, or if an array is passed as an argument to a
+ *     function, then its size must be declared before any such use."
+ */
+
+
+/* Assume the array is sized in a different compilation unit.
+ */
+vec4 [] an_array;
+
+void main()
+{
+  gl_Position = an_array[2];
+}