- fixed CLI -x mode

- fixed a wrong error message when global symbol is not found

lynglib/src/commonTest/kotlin/CalculusDiagnosticRegressionTest.kt

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+import kotlinx.coroutines.test.runTest
+import net.sergeych.lyng.ScriptError
+import net.sergeych.lyng.eval
+import kotlin.test.Test
+import kotlin.test.assertContains
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+
+class CalculusDiagnosticRegressionTest {
+
+    @Test
+    fun undefinedHInCalculusSnippetReportsPreciseDiagnostic() = runTest {
+        val ex = assertFailsWith<ScriptError> {
+            eval(
+                """
+                var x = 7.0
+                // глубина по звуку падения
+                val m = 1 // kg
+                val d = 0.06 // 6 cm
+                val c = 340 // скор. звука
+                val g = 9.82
+                var cnt = 0
+                var t = x
+                var message = ""
+                val hinv = 1/h
+                var h = c*c/g*(1 + g*t/c -sqrt(1+2*g*t/c))
+                assert(h is Real)
+                assert(!h.isNaN())
+                """.trimIndent()
+            )
+        }
+
+        assertEquals(9, ex.pos.line)
+        assertEquals(13, ex.pos.column)
+        assertContains(ex.errorMessage, "symbol 'h' is not defined")
+        assertContains(ex.message ?: "", "val hinv = 1/h")
+    }
+}