From d9f383f90c1808fedcba8794918d925119a9a0c5 Mon Sep 17 00:00:00 2001
From: Bharat Middha <5100938+bmiddha@users.noreply.github.com>
Date: Fri, 21 Nov 2025 14:36:00 -0800
Subject: [PATCH] Fix issue where ignoring ERR_MODULE_NOT_FOUND errors when
 importing the rspack config masks legitimate import issues

---
 .../bmiddha-rspack-config-load_2025-11-21-22-35.json   | 10 ++++++++++
 .../src/RspackConfigurationLoader.ts                   |  5 -----
 2 files changed, 10 insertions(+), 5 deletions(-)
 create mode 100644 common/changes/@rushstack/heft-rspack-plugin/bmiddha-rspack-config-load_2025-11-21-22-35.json

diff --git a/common/changes/@rushstack/heft-rspack-plugin/bmiddha-rspack-config-load_2025-11-21-22-35.json b/common/changes/@rushstack/heft-rspack-plugin/bmiddha-rspack-config-load_2025-11-21-22-35.json
new file mode 100644
index 00000000000..0af39f23ca2
--- /dev/null
+++ b/common/changes/@rushstack/heft-rspack-plugin/bmiddha-rspack-config-load_2025-11-21-22-35.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@rushstack/heft-rspack-plugin",
+      "comment": "Fix issue where ignoring ERR_MODULE_NOT_FOUND errors when importing the rspack config masks legitimate import issues.",
+      "type": "patch"
+    }
+  ],
+  "packageName": "@rushstack/heft-rspack-plugin"
+}
\ No newline at end of file
diff --git a/heft-plugins/heft-rspack-plugin/src/RspackConfigurationLoader.ts b/heft-plugins/heft-rspack-plugin/src/RspackConfigurationLoader.ts
index 3864f08dc6f..98a6d37fdcf 100644
--- a/heft-plugins/heft-rspack-plugin/src/RspackConfigurationLoader.ts
+++ b/heft-plugins/heft-rspack-plugin/src/RspackConfigurationLoader.ts
@@ -177,11 +177,6 @@ export async function _tryLoadRspackConfigurationFileInnerAsync(
       const configurationUri: string = pathToFileURL(configurationPath).href;
       return await import(configurationUri);
     } catch (e) {
-      const error: NodeJS.ErrnoException = e as NodeJS.ErrnoException;
-      if (error.code === 'ERR_MODULE_NOT_FOUND') {
-        // No configuration found, return undefined.
-        return undefined;
-      }
       throw new Error(`Error loading Rspack configuration at "${configurationPath}": ${e}`);
     }
   } else {