diff --git a/src/browser/assets/WebSourceLocationArtifacts.ts b/src/browser/assets/WebSourceLocationArtifacts.ts
index f15503d07b..7be5133ace 100644
--- a/src/browser/assets/WebSourceLocationArtifacts.ts
+++ b/src/browser/assets/WebSourceLocationArtifacts.ts
@@ -60,39 +60,24 @@ export class LocalWebSourceLocationArtifacts implements WebSourceLocationArtifac
   async #load(input: WebSourceLocationInput, options?: ExecutionOptions) {
     const loaded = await this.scripts.load(input, options);
     if (!loaded.ok) return loaded;
-    try {
-      const data = await readStableArtifact(
-        input.source_map.path,
-        WEB_SOURCE_MAP_LIMITS.mapBytes,
-        options?.signal,
-        undefined,
-        this.#resources,
-      );
-      return ok({
-        ...loaded.value,
-        sourceMap: {
-          file: {
-            path: input.source_map.path,
-            sha256: data.sha256,
-            bytes: data.bytes.length,
-          },
-          url: input.source_map.url,
-          text: decodeWebArtifact(data.bytes),
+    const data = await readStableArtifact(
+      input.source_map.path,
+      WEB_SOURCE_MAP_LIMITS.mapBytes,
+      options?.signal,
+      undefined,
+      this.#resources,
+    );
+    return ok({
+      ...loaded.value,
+      sourceMap: {
+        file: {
+          path: input.source_map.path,
+          sha256: data.sha256,
+          bytes: data.bytes.length,
         },
-      });
-    } catch (cause: unknown) {
-      return err(
-        webArtifactReadError(
-          cause,
-          {
-            operation: "trace_web_source_location",
-            field: ["source_map", "path"],
-            targetPath: input.source_map.path,
-            callerSelected: true,
-          },
-          options?.signal,
-        ),
-      );
-    }
+        url: input.source_map.url,
+        text: decodeWebArtifact(data.bytes),
+      },
+    });
   }
 }
diff --git a/src/browser/modules/WebModuleArtifacts.ts b/src/browser/modules/WebModuleArtifacts.ts
index 9c9b72e90d..3f9ee086d4 100644
--- a/src/browser/modules/WebModuleArtifacts.ts
+++ b/src/browser/modules/WebModuleArtifacts.ts
@@ -69,36 +69,21 @@ export class LocalWebModuleArtifacts implements WebModuleArtifactPort {
     if (input.import_map === undefined)
       return ok({ ...loaded.value, importMap: null });
     const selected = input.import_map;
-    try {
-      const data = await readWebArtifactJson(
-        selected.path,
-        4 * 1024 * 1024,
-        options?.signal,
-        this.#resources,
-      );
-      const importMap: WebModuleArtifacts["importMap"] = {
-        file: {
-          path: selected.path,
-          sha256: data.sha256,
-          bytes: data.bytes.length,
-        },
-        baseUrl: selected.base_url,
-        value: jsonObjectSchema.parse(data.value),
-      };
-      return ok({ ...loaded.value, importMap });
-    } catch (cause: unknown) {
-      return err(
-        webArtifactReadError(
-          cause,
-          {
-            operation: "trace_web_module_imports",
-            field: ["import_map", "path"],
-            targetPath: selected.path,
-            callerSelected: true,
-          },
-          options?.signal,
-        ),
-      );
-    }
+    const data = await readWebArtifactJson(
+      selected.path,
+      4 * 1024 * 1024,
+      options?.signal,
+      this.#resources,
+    );
+    const importMap: WebModuleArtifacts["importMap"] = {
+      file: {
+        path: selected.path,
+        sha256: data.sha256,
+        bytes: data.bytes.length,
+      },
+      baseUrl: selected.base_url,
+      value: jsonObjectSchema.parse(data.value),
+    };
+    return ok({ ...loaded.value, importMap });
   }
 }