native

kotlin-native/runtime/build.gradle.kts

diff --git a/kotlin-native/runtime/build.gradle.kts b/kotlin-native/runtime/build.gradle.kts
index 6fd96a1..fc1de75 100644
--- a/kotlin-native/runtime/build.gradle.kts
+++ b/kotlin-native/runtime/build.gradle.kts
@@ -509,7 +509,7 @@
 
             // See allowReturnValueCheckerButNotReport() in libraries/stdlib/build.gradle.kts:
             "-Xreturn-value-checker=check",
-            "-Xwarning-level=RETURN_VALUE_NOT_USED:disabled,ACTUAL_ANNOTATIONS_NOT_MATCH_EXPECT:disabled",
+            "-Xwarning-level=RETURN_VALUE_NOT_USED:disabled",
 
             "-Xfragment-refines=nativeMain:nativeWasm,nativeMain:common,nativeWasm:common,nativeWasm:commonNonJvm,commonNonJvm:common",
             "-Xmanifest-native-targets=${platformManager.targetValues.joinToString(separator = ",") { it.visibleName }}",

kotlin-native/runtime/src/main/kotlin/kotlin/text/StringBuilderNative.kt

diff --git a/kotlin-native/runtime/src/main/kotlin/kotlin/text/StringBuilderNative.kt b/kotlin-native/runtime/src/main/kotlin/kotlin/text/StringBuilderNative.kt
index 096a205..7a4d909 100644
--- a/kotlin-native/runtime/src/main/kotlin/kotlin/text/StringBuilderNative.kt
+++ b/kotlin-native/runtime/src/main/kotlin/kotlin/text/StringBuilderNative.kt
@@ -9,31 +9,37 @@
 import kotlin.native.internal.GCUnsafeCall
 
 /** Appends [value] to this [StringBuilder], followed by a line feed character (`\n`). */
+@IgnorableReturnValue
 @SinceKotlin("1.4")
 @kotlin.internal.InlineOnly
 public actual inline fun StringBuilder.appendLine(value: Byte): StringBuilder = append(value).appendLine()
 
 /** Appends [value] to this [StringBuilder], followed by a line feed character (`\n`). */
+@IgnorableReturnValue
 @SinceKotlin("1.4")
 @kotlin.internal.InlineOnly
 public actual inline fun StringBuilder.appendLine(value: Short): StringBuilder = append(value).appendLine()
 
 /** Appends [value] to this [StringBuilder], followed by a line feed character (`\n`). */
+@IgnorableReturnValue
 @SinceKotlin("1.4")
 @kotlin.internal.InlineOnly
 public actual inline fun StringBuilder.appendLine(value: Int): StringBuilder = append(value).appendLine()
 
 /** Appends [value] to this [StringBuilder], followed by a line feed character (`\n`). */
+@IgnorableReturnValue
 @SinceKotlin("1.4")
 @kotlin.internal.InlineOnly
 public actual inline fun StringBuilder.appendLine(value: Long): StringBuilder = append(value).appendLine()
 
 /** Appends [value] to this [StringBuilder], followed by a line feed character (`\n`). */
+@IgnorableReturnValue
 @SinceKotlin("1.4")
 @kotlin.internal.InlineOnly
 public actual inline fun StringBuilder.appendLine(value: Float): StringBuilder = append(value).appendLine()
 
 /** Appends [value] to this [StringBuilder], followed by a line feed character (`\n`). */
+@IgnorableReturnValue
 @SinceKotlin("1.4")
 @kotlin.internal.InlineOnly
 public actual inline fun StringBuilder.appendLine(value: Double): StringBuilder = append(value).appendLine()
@@ -85,4 +91,4 @@
 
 @GCUnsafeCall("Kotlin_StringBuilder_insertInt")
 @Escapes.Nothing
-internal actual external fun insertInt(array: CharArray, start: Int, value: Int): Int
\ No newline at end of file
+internal actual external fun insertInt(array: CharArray, start: Int, value: Int): Int

kotlin-native/runtime/src/main/kotlin/kotlin/text/Strings.kt

diff --git a/kotlin-native/runtime/src/main/kotlin/kotlin/text/Strings.kt b/kotlin-native/runtime/src/main/kotlin/kotlin/text/Strings.kt
index af67391..4567cbe 100644
--- a/kotlin-native/runtime/src/main/kotlin/kotlin/text/Strings.kt
+++ b/kotlin-native/runtime/src/main/kotlin/kotlin/text/Strings.kt
@@ -449,6 +449,7 @@
  * @throws IndexOutOfBoundsException when the subrange doesn't fit into the [destination] array starting at the specified [destinationOffset],
  *  or when that index is out of the [destination] array indices range.
  */
+@IgnorableReturnValue
 @SinceKotlin("2.0")
 @Suppress("ACTUAL_FUNCTION_WITH_DEFAULT_ARGUMENTS")
 public actual fun String.toCharArray(