Guard g10 interpreter fixture coverage

wasm-port/tests/browser/interp_smoke.html

@@ -7974,6 +7974,17 @@
         ].join("\n"),
       );
 
+      const g10RegressionFiles = [
+        "g10-l1-l10/test.ngc",
+        "g10-l11/test.ngc",
+        "g10-l2-while-active/test.ngc",
+        "g10-l20-while-active/test.ngc",
+        "g10-with-g92/test.ngc",
+      ];
+      if (g10RegressionFiles.length !== 5 || new Set(g10RegressionFiles).size !== g10RegressionFiles.length) {
+        throw new Error("browser_interp_g10_fixture_coverage: list drift");
+      }
+
       const g10L1L10Dir = await writeG10RegressionFiles(interp, "g10-l1-l10", [
         "test.ngc",
         "test.tbl",

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

@@ -2830,6 +2830,19 @@ verifyExpectedOutput(
   ].join("\n"),
 );
 
+const g10RegressionFiles = [
+  "g10-l1-l10/test.ngc",
+  "g10-l11/test.ngc",
+  "g10-l2-while-active/test.ngc",
+  "g10-l20-while-active/test.ngc",
+  "g10-with-g92/test.ngc",
+];
+assert.deepEqual(
+  g10RegressionFiles,
+  interpRegressionNgcFilesRecursive("g10"),
+  "interp g10 fixture coverage drift",
+);
+
 const g10L1L10Dir = writeG10RegressionFiles("g10-l1-l10", ["test.ngc", "test.tbl"]);
 verifyExpectedOutput(
   "interp_g10_l1_l10_wasm",