From f64a41f09e971e1305aa51e6a8220a31e479cfbc Mon Sep 17 00:00:00 2001
From: Andrey Lihatskiy <118752495+marchcat@users.noreply.github.com>
Date: Mon, 15 Sep 2025 18:24:21 +0300
Subject: LLLeap: handle partial lines in stderr (#4678)

---
 indra/llcommon/llleap.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'indra/llcommon/llleap.cpp')

diff --git a/indra/llcommon/llleap.cpp b/indra/llcommon/llleap.cpp
index 662a2511cd..ada6b9519e 100644
--- a/indra/llcommon/llleap.cpp
+++ b/indra/llcommon/llleap.cpp
@@ -188,6 +188,17 @@ public:
                                << childout.peek(0, peeklen) << "..." << LL_ENDL;
         }
 
+        // Handle any remaining stderr data (partial lines) the same way as we do
+        // for stdout: log it.
+        LLProcess::ReadPipe& childerr(mChild->getReadPipe(LLProcess::STDERR));
+        if (childerr.size())
+        {
+            LLProcess::ReadPipe::size_type
+                peeklen((std::min)(LLProcess::ReadPipe::size_type(50), childerr.size()));
+            LL_WARNS("LLLeap") << "Final stderr " << childerr.size() << " bytes: "
+                               << childerr.peek(0, peeklen) << "..." << LL_ENDL;
+        }
+
         // Kill this instance. MUST BE LAST before return!
         delete this;
         return false;
-- 
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