Fix --profile function timing stack leak on nextfile inside a function

src/main/java/io/jawk/backend/AVM.java

@@ -2889,9 +2889,15 @@ private String normalizeIndirectFunctionName(String functionName) {
 
 	/**
 	 * Unwinds every call frame and clears the per-call runtime state, after an
-	 * {@code exit} statement or an abandoned execution.
+	 * {@code exit} or {@code nextfile} statement or an abandoned execution.
+	 * When profiling, the abandoned function calls are recorded as exited at
+	 * this point, so the timing report stays accurate and the active-function
+	 * stack does not leak entries (see #557).
 	 */
 	private void resetCallState() {
+		if (profiling) {
+			recordAllFunctionExits(System.nanoTime());
+		}
 		runtimeStack.popAllFrames();
 		elementArgumentReferences.clear();
 		clearOperandStack();
@@ -4180,8 +4186,7 @@ private void executeNextfile(PositionTracker position) {
 					"`nextfile' cannot be called from an ENDFILE rule");
 		}
 		// nextfile can be invoked from user-defined functions: unwind them.
-		runtimeStack.popAllFrames();
-		clearOperandStack();
+		resetCallState();
 		if (endFileAddress == null
 				|| withinBeginFileBlocks && jrt.hasPendingInputFileError(resolvedInputSource)) {
 			// No ENDFILE rules to run, or the file could not be opened: skip

src/site/markdown/behavior-changes.md

@@ -20,6 +20,12 @@ released version automatically via .github/scripts/stamp-behavior-changes.sh.
 
 ## Unreleased
 
+- The `--profile` function timing report now records a user-defined function call abandoned by
+  `nextfile` as exited when `nextfile` unwinds it, with its actual duration. Previously each such
+  call leaked an entry on the internal function timing stack (unbounded memory growth on long
+  profiled runs), and the abandoned calls were either missing from the report or accounted with
+  wildly wrong durations at program exit
+  ([#557](https://github.com/jawkio/jawk/issues/557)).
 - A conditional expression whose result feeds a further operation on a literal — shapes like
   `(v ? v : 24) * 2`, `-(v ? 5 : 24)`, or `$(v ? 1 : 2)` — now evaluates correctly under the
   default tuple optimization. Previously the peephole literal fold merged the false branch's

src/test/java/io/jawk/CliOptionTest.java

@@ -41,6 +41,8 @@
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 import org.junit.Test;
 import org.junit.Rule;
 import org.junit.rules.TemporaryFolder;
@@ -118,6 +120,44 @@ public void profileOptionRecordsIndirectUserFunctions() throws Exception {
 		assertTrue(result.errorOutput().contains("typeof"));
 	}
 
+	@Test
+	public void profileOptionRecordsFunctionsUnwoundByNextfile() throws Exception {
+		AwkTestSupport.TestResult result = AwkTestSupport
+				.cliTest("CLI --profile records functions unwound by nextfile")
+				.argument("--profile")
+				.script("function inner() { nextfile } function outer() { inner() } { outer() }")
+				.file("f1", "a1\na2\n")
+				.file("f2", "b1\nb2\n")
+				.file("f3", "c1\nc2\n")
+				.operand("{{f1}}", "{{f2}}", "{{f3}}")
+				.expect("")
+				.run();
+
+		result.assertExpected();
+		// Each file triggers exactly one outer() -> inner() -> nextfile chain;
+		// nextfile abandons both calls, which must still be recorded once each.
+		assertEquals(3, profiledFunctionCount(result.errorOutput(), "inner"));
+		assertEquals(3, profiledFunctionCount(result.errorOutput(), "outer"));
+	}
+
+	/**
+	 * Extracts the execution count of one function from a {@code --profile}
+	 * report.
+	 *
+	 * @param report the profiling report text
+	 * @param functionName the function to look up
+	 * @return the reported execution count
+	 */
+	private static long profiledFunctionCount(String report, String functionName) {
+		Matcher matcher = Pattern
+				.compile("^\\s{2}" + Pattern.quote(functionName) + "\\s+(\\d+)\\s", Pattern.MULTILINE)
+				.matcher(report);
+		assertTrue(
+				"function `" + functionName + "' missing from profiling report:\n" + report,
+				matcher.find());
+		return Long.parseLong(matcher.group(1));
+	}
+
 	@Test
 	public void profileOptionWithFilenameWritesReportToFile() throws Exception {
 		File profile = tempFolder.newFile("profile.txt");