diff --git a/src/main/plugins/plugin-worker-output-buffer.ts b/src/main/plugins/plugin-worker-output-buffer.ts
index 836330c879..6a0cb2a078 100644
--- a/src/main/plugins/plugin-worker-output-buffer.ts
+++ b/src/main/plugins/plugin-worker-output-buffer.ts
@@ -1,0 +2 @@ import type { Readable } from 'node:stream'
+import { ownRetainedString } from '../../shared/own-retained-string'
@@ -24,3 +25,5 @@ export function pipePluginWorkerOutput(
-        truncated
-          ? `${line.slice(0, PLUGIN_WORKER_OUTPUT_LINE_LIMIT - TRUNCATION_SUFFIX.length)}${TRUNCATION_SUFFIX}`
-          : line
+        ownRetainedString(
+          truncated
+            ? `${line.slice(0, PLUGIN_WORKER_OUTPUT_LINE_LIMIT - TRUNCATION_SUFFIX.length)}${TRUNCATION_SUFFIX}`
+            : line
+        )
@@ -52 +55 @@ export function pipePluginWorkerOutput(
-        buffered += segment
+        buffered += newline === -1 ? ownRetainedString(segment) : segment