JVM: use precise line bounds when regenerating objects with no SMAPs

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/AnonymousObjectTransformer.kt

@@ -117,7 +117,8 @@ class AnonymousObjectTransformer(
         // When regenerating objects in inline lambdas, keep the old SMAP and don't remap the line numbers to
         // save time. The result is effectively the same anyway.
         val debugInfoToParse = if (inliningContext.isInliningLambda) null else debugInfo
-        sourceMap = SMAPParser.parseOrCreateDefault(debugInfoToParse, sourceInfo, oldObjectType.internalName, 1, 65535)
+        val (firstLine, lastLine) = (methodsToTransform + listOfNotNull(constructor)).lineNumberRange()
+        sourceMap = SMAPParser.parseOrCreateDefault(debugInfoToParse, sourceInfo, oldObjectType.internalName, firstLine, lastLine)
         sourceMapper = SourceMapper(sourceMap.fileMappings.firstOrNull { it.name == sourceInfo }?.toSourceInfo())
 
         val allCapturedParamBuilder = ParametersBuilder.newBuilder()

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/inlineCodegenUtils.kt

@@ -92,12 +92,8 @@ internal fun getMethodNode(
     val cr = ClassReader(classData)
     var node: MethodNode? = null
     val debugInfo = arrayOfNulls<String>(2)
-    val lines = IntArray(2)
-    lines[0] = Integer.MAX_VALUE
-    lines[1] = Integer.MIN_VALUE
 
     cr.accept(object : ClassVisitor(Opcodes.API_VERSION) {
-
         override fun visitSource(source: String?, debug: String?) {
             super.visitSource(source, debug)
             debugInfo[0] = source
@@ -123,16 +119,8 @@ internal fun getMethodNode(
             node?.let { existing ->
                 throw AssertionError("Can't find proper '$name' method for inline: ambiguity between '${existing.name + existing.desc}' and '${name + desc}'")
             }
-
-            return object : MethodNode(Opcodes.API_VERSION, access, name, desc, signature, exceptions) {
-                override fun visitLineNumber(line: Int, start: Label) {
-                    super.visitLineNumber(line, start)
-                    lines[0] = min(lines[0], line)
-                    lines[1] = max(lines[1], line)
-                }
-            }.also {
-                node = it
-            }
+            node = MethodNode(Opcodes.API_VERSION, access, name, desc, signature, exceptions)
+            return node!!
         }
     }, ClassReader.SKIP_FRAMES or if (GENERATE_SMAP) 0 else ClassReader.SKIP_DEBUG)
 
@@ -140,10 +128,25 @@ internal fun getMethodNode(
         return null
     }
 
-    val smap = SMAPParser.parseOrCreateDefault(debugInfo[1], debugInfo[0], classType.internalName, lines[0], lines[1])
+    val (first, last) = listOfNotNull(node).lineNumberRange()
+    val smap = SMAPParser.parseOrCreateDefault(debugInfo[1], debugInfo[0], classType.internalName, first, last)
     return SMAPAndMethodNode(node!!, smap)
 }
 
+internal fun Collection<MethodNode>.lineNumberRange(): Pair<Int, Int> {
+    var minLine = Int.MAX_VALUE
+    var maxLine = Int.MIN_VALUE
+    for (node in this) {
+        for (insn in node.instructions.asSequence()) {
+            if (insn is LineNumberNode) {
+                minLine = min(minLine, insn.line)
+                maxLine = max(maxLine, insn.line)
+            }
+        }
+    }
+    return minLine to maxLine
+}
+
 internal fun findVirtualFile(state: GenerationState, classId: ClassId): VirtualFile? {
     return VirtualFileFinder.getInstance(state.project, state.module).findVirtualFileWithHeader(classId)
 }

compiler/testData/codegen/bytecodeText/lineNumbers/inlineLambdaObjectInit.kt

@@ -0,0 +1,13 @@
+fun box(): String {
+    var result = ""
+    run {
+        object {
+            init {
+                result = "OK"
+            }
+        }
+    }
+    return result
+}
+
+// 1 LINENUMBER 6

compiler/tests/org/jetbrains/kotlin/codegen/BytecodeTextTestGenerated.java

@@ -3452,6 +3452,11 @@ public class BytecodeTextTestGenerated extends AbstractBytecodeTextTest {
             runTest("compiler/testData/codegen/bytecodeText/lineNumbers/inlineCondition2.kt");
         }
 
+        @TestMetadata("inlineLambdaObjectInit.kt")
+        public void testInlineLambdaObjectInit() throws Exception {
+            runTest("compiler/testData/codegen/bytecodeText/lineNumbers/inlineLambdaObjectInit.kt");
+        }
+
         @TestMetadata("singleThen.kt")
         public void testSingleThen() throws Exception {
             runTest("compiler/testData/codegen/bytecodeText/lineNumbers/singleThen.kt");

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBytecodeTextTestGenerated.java

@@ -3537,6 +3537,11 @@ public class IrBytecodeTextTestGenerated extends AbstractIrBytecodeTextTest {
             runTest("compiler/testData/codegen/bytecodeText/lineNumbers/inlineCondition2.kt");
         }
 
+        @TestMetadata("inlineLambdaObjectInit.kt")
+        public void testInlineLambdaObjectInit() throws Exception {
+            runTest("compiler/testData/codegen/bytecodeText/lineNumbers/inlineLambdaObjectInit.kt");
+        }
+
         @TestMetadata("singleThen.kt")
         public void testSingleThen() throws Exception {
             runTest("compiler/testData/codegen/bytecodeText/lineNumbers/singleThen.kt");