From 17e6cb5ff714cdfe5c1519e9d7fcbdd1bba77fef Mon Sep 17 00:00:00 2001
From: David Schulz <david.schulz@qt.io>
Date: Fri, 19 Oct 2018 10:43:38 +0200
Subject: [PATCH] ProjectExplorer: do not send non existing debug output

Task-number: QTCREATORBUG-20848
Fixes: QTCREATORBUG-21215
Change-Id: I55366b42a94721ea800d0babe72f24d343d55de2
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
---
 src/plugins/projectexplorer/windebuginterface.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/plugins/projectexplorer/windebuginterface.cpp b/src/plugins/projectexplorer/windebuginterface.cpp
index 985fec933f4..25aa953e645 100644
--- a/src/plugins/projectexplorer/windebuginterface.cpp
+++ b/src/plugins/projectexplorer/windebuginterface.cpp
@@ -177,6 +177,8 @@ void WinDebugInterface::dispatchDebugOutput()
     m_outputMutex.lock();
     for (auto &entry : m_debugOutput) {
         std::vector<QString> &src = entry.second;
+        if (src.empty())
+            continue;
         QString dst;
         size_t n = std::min(maxMessagesToSend, src.size());
         for (size_t i = 0; i < n; ++i)