fixed wrong line report on throw statement

lynglib/src/jvmTest/kotlin/ThrowSourcePosJvmTest.kt

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2025 Sergey S. Chernov
+ */
+
+import kotlinx.coroutines.runBlocking
+import net.sergeych.lyng.Scope
+import net.sergeych.lyng.ScriptError
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.fail
+
+class ThrowSourcePosJvmTest {
+
+    private fun assertThrowLine(code: String, expectedLine: Int) {
+        try {
+            runBlocking { Scope().eval(code) }
+            fail("Expected ScriptError to be thrown, but nothing was thrown")
+        } catch (se: ScriptError) {
+            println(se.message)
+            assertEquals(expectedLine, se.pos.line)
+        }
+    }
+
+    @Test
+    fun simpleThrow_afterComments_reportsCorrectLine() {
+        val code = """
+            // line 1
+            // line 2
+            throw "simple"
+        """.trimIndent()
+        // zero-based line index
+        assertThrowLine(code, 2)
+    }
+
+    @Test
+    fun inlineThrow_withLeadingSpaces_reportsCorrectLine() {
+        val code = """
+            val x = 1
+                throw "boom"
+        """.trimIndent()
+        // throw is on the 2nd line (zero-based index 1)
+        assertThrowLine(code, 1)
+    }
+
+    @Test
+    fun throwInsideBlock_reportsCorrectLine() {
+        val code = """
+            if( true ) {
+                // comment
+                throw "boom"
+            }
+        """.trimIndent()
+        // throw is on the 3rd line of the snippet (zero-based index 2)
+        assertThrowLine(code, 2)
+    }
+
+    @Test
+    fun throwAsExpression_reportsCorrectLine() {
+        val code = """
+            val x = null
+            val y = x ?: throw "npe-like"
+        """.trimIndent()
+        // throw is on the 2nd line (zero-based index 1)
+        assertThrowLine(code, 1)
+    }
+}