Test octal literal in regex

kotlin-native/backend.native/tests/stdlib_external/utils.kt

@@ -32,6 +32,8 @@ public actual val supportsSuppressedExceptions: Boolean get() = true
 
 public actual val supportsNamedCapturingGroup: Boolean get() = true
 
+public actual val supportsOctalLiteralInRegex: Boolean get() = true
+
 public actual val regexSplitUnicodeCodePointHandling: Boolean get() = true
 
 public actual object BackReferenceHandling {

libraries/stdlib/common/test/testUtils.kt

@@ -20,6 +20,8 @@ public expect val supportsSuppressedExceptions: Boolean
 
 public expect val supportsNamedCapturingGroup: Boolean
 
+public expect val supportsOctalLiteralInRegex: Boolean
+
 public expect val regexSplitUnicodeCodePointHandling: Boolean
 
 public enum class HandlingOption {

libraries/stdlib/js/test/core/testUtils.kt

@@ -29,6 +29,8 @@ actual val supportsSuppressedExceptions: Boolean get() = true
 
 public actual val supportsNamedCapturingGroup: Boolean get() = true
 
+public actual val supportsOctalLiteralInRegex: Boolean get() = false
+
 public actual val regexSplitUnicodeCodePointHandling: Boolean get() = true
 
 public actual object BackReferenceHandling {

libraries/stdlib/jvm/test/testUtilsJVM.kt

@@ -43,6 +43,8 @@ public actual val supportsSuppressedExceptions: Boolean get() = !isJava6
 
 public actual val supportsNamedCapturingGroup: Boolean get() = !isJava6
 
+public actual val supportsOctalLiteralInRegex: Boolean get() = true
+
 public actual val regexSplitUnicodeCodePointHandling: Boolean get() = false
 
 public actual object BackReferenceHandling {

libraries/stdlib/test/text/RegexTest.kt

@@ -9,6 +9,7 @@ package test.text
 
 import test.regexSplitUnicodeCodePointHandling
 import test.supportsNamedCapturingGroup
+import test.supportsOctalLiteralInRegex
 import test.BackReferenceHandling
 import test.HandlingOption
 import kotlin.test.*
@@ -242,6 +243,14 @@ class RegexTest {
         testInvalidBackReference(BackReferenceHandling.notYetDefinedGroup, pattern = "a\\1(a)")
     }
 
+    @Test fun matchCharWithOctalValue() {
+        if (supportsOctalLiteralInRegex) {
+            assertEquals("aa", "a\\0141".toRegex().find("aaaa")?.value)
+        } else {
+            assertFails { "a\\0141".toRegex() }
+        }
+    }
+
     @Test fun matchNamedGroupsWithBackReference() {
         if (!supportsNamedCapturingGroup) return
 

libraries/stdlib/wasm/test/testUtils.kt

@@ -30,6 +30,8 @@ actual val supportsSuppressedExceptions: Boolean get() = true
 
 public actual val supportsNamedCapturingGroup: Boolean get() = true
 
+public actual val supportsOctalLiteralInRegex: Boolean get() = true
+
 public actual val regexSplitUnicodeCodePointHandling: Boolean get() = true
 
 public actual object BackReferenceHandling {