Fixes infinite recursion in DRI expansion caused by bounds on nullable parameters

1 files changed, 43 insertions, 0 deletions

diff --git a/core/src/test/kotlin/basic/DRITest.kt b/core/src/test/kotlin/basic/DRITest.kt
new file mode 100644
index 00000000..f8328e35
--- /dev/null
+++ b/core/src/test/kotlin/basic/DRITest.kt
@@ -0,0 +1,43 @@
+package basic
+
+import org.jetbrains.dokka.links.*
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import testApi.testRunner.AbstractCoreTest
+
+class DRITest: AbstractCoreTest() {
+    @Test
+    fun `#634`() {
+        val configuration = dokkaConfiguration {
+            passes {
+                pass {
+                    sourceRoots = listOf("src/")
+                }
+            }
+        }
+
+        testInline(
+            """
+            |/src/main/kotlin/basic/Test.kt
+            |package toplevel
+            |
+            |inline fun <T, R : Comparable<R>> Array<out T>.mySortBy(
+            |    crossinline selector: (T) -> R?): Array<out T> = TODO()
+            |}
+        """.trimMargin(),
+            configuration
+        ) {
+            documentablesMergingStage = { module ->
+                val expected = TypeConstructor("kotlin.Function1", listOf(
+                    TypeParam(listOf(Nullable(TypeConstructor("kotlin.Any", emptyList())))),
+                    Nullable(TypeParam(listOf(TypeConstructor("kotlin.Comparable", listOf(SelfType)))))
+                ))
+                val actual = module.packages.single()
+                    .functions.single()
+                    .dri.callable?.params?.single()
+                assertEquals(expected, actual)
+            }
+        }
+    }
+
+}
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