fix(ui): Fix segmentation fault when opening the message log (endless-sky#9675)

RisingLeaf · web-flow · commit 216fa14b6a10 · 2024-01-16T20:25:02.000+01:00
diff --git a/source/Messages.cpp b/source/Messages.cpp
@@ -39,7 +39,7 @@ void Messages::Add(const string &message, Importance importance)
 {
 	lock_guard<mutex> lock(incomingMutex);
 	incoming.emplace_back(message, importance);
-	if(message != logged.front().first)
+	if(logged.empty() || message != logged.front().first)
 	{
 		logged.emplace_front(message, importance);
 		if(logged.size() > MAX_LOG)

Original file line number	Diff line number	Diff line change
`@@ -39,7 +39,7 @@ void Messages::Add(const string &message, Importance importance)`
`39`	`39`	`{`
`40`	`40`	`lock_guard<mutex> lock(incomingMutex);`
`41`	`41`	`incoming.emplace_back(message, importance);`
`42`		`- if(message != logged.front().first)`
	`42`	`+ if(logged.empty() \|\| message != logged.front().first)`
`43`	`43`	`{`
`44`	`44`	`logged.emplace_front(message, importance);`
`45`	`45`	`if(logged.size() > MAX_LOG)`