Guard nested remaps oword staging paths

wasm-port/tests/wasm/node/verify_interp_wasm.mjs

@@ -246,15 +246,20 @@ function writeRemapRegressionFiles(name, files) {
   return wasmDir;
 }
 
-function assertRemapRegressionStaging(name, files, wasmDir) {
+function assertRemapRegressionStaging(name, files, wasmDir, expectedUnstagedFiles = []) {
   const sourceDir = resolve(rootDir, "vendor/linuxcnc/tests/remap", name);
   assert.deepEqual(
     readdirSync(sourceDir)
       .filter((filename) => filename.endsWith(".ini") || filename.endsWith(".ngc"))
       .sort(),
-    [...files].sort(),
+    [...files, ...expectedUnstagedFiles].sort(),
     `remap ${name} fixture coverage drift`,
   );
+  assert.deepEqual(
+    files.filter((file) => expectedUnstagedFiles.includes(file)),
+    [],
+    `remap ${name} unstaged fixture overlap drift`,
+  );
   assert.deepEqual(
     files.map((file) => `${wasmDir}/${file}`),
     files.map((file) => `/work/remap/${name}/${file}`),
@@ -1110,14 +1115,27 @@ verifyExpectedOutput(
   ].join("\n"),
 );
 
-const nestedRemapsOwordDir = writeRemapRegressionFiles("nested-remaps-oword", [
+const nestedRemapsOwordFiles = [
   "test.ini",
   "test.ngc",
   "rm400.ngc",
   "rm401.ngc",
   "rm402.ngc",
   "rm403.ngc",
-]);
+];
+const nestedRemapsOwordUnstagedFiles = [
+  "testsub.ngc",
+];
+const nestedRemapsOwordDir = writeRemapRegressionFiles(
+  "nested-remaps-oword",
+  nestedRemapsOwordFiles,
+);
+assertRemapRegressionStaging(
+  "nested-remaps-oword",
+  nestedRemapsOwordFiles,
+  nestedRemapsOwordDir,
+  nestedRemapsOwordUnstagedFiles,
+);
 verifyExpectedOutput(
   "nested_remaps_oword_remap_wasm",
   interp.runRemapFile(