remove explicit nullability check

Author: bgw

packages/next/errors.json

@@ -707,5 +707,6 @@
   "706": "Invariant: static responses cannot be streamed %s",
   "707": "Invariant app-page handler received invalid cache entry %s",
   "708": "Failed to persist Chrome DevTools workspace UUID. The Chrome DevTools Workspace needs to be reconnected after the next page reload.",
-  "709": "`rspack.getModuleNamedExports` is not supported by the wasm bindings."
+  "709": "`rspack.getModuleNamedExports` is not supported by the wasm bindings.",
+  "710": "cannot run loadNative when `NEXT_TEST_WASM` is set"
 }

packages/next/src/build/swc/index.ts

@@ -1077,6 +1077,7 @@ function bindingToApi(
   }
 }
 
+// helper for tryLoadWasmWithFallback / loadBindings.
 async function loadWasm(importPath = '') {
   let attempts = []
   let rawBindings: RawWasmBindings | null = null
@@ -1085,7 +1086,7 @@ async function loadWasm(importPath = '') {
   // unstable and subject to change.
   const testWasmDir = process.env.NEXT_TEST_WASM_DIR
 
-  if (testWasmDir != null) {
+  if (testWasmDir) {
     // assume these are node.js bindings and don't need a call to `.default()`
     rawBindings = await import(
       pathToFileURL(path.join(testWasmDir, 'wasm.js')).toString()