Avoid possible nil pointer dereference if a poll is created with nil clients.

rfm · rfm · commit 465bcaa70da4 · 2022-10-19T19:17:41.000+01:00
diff --git a/SQLClientPool.m b/SQLClientPool.m
@@ -885,7 +885,10 @@ - (BOOL) _swallowClient: (SQLClient*)client explicit: (BOOL)swallowed
                    * caused by deallocation.
                    */
                   _items[index].u = 0;
-                  NSIncrementExtraRefCount(client);
+                  if (client)
+                    {
+                      NSIncrementExtraRefCount(client);
+                    }
                 }
               else
                 {

Original file line number	Diff line number	Diff line change
`@@ -885,7 +885,10 @@ - (BOOL) _swallowClient: (SQLClient*)client explicit: (BOOL)swallowed`
`885`	`885`	`* caused by deallocation.`
`886`	`886`	`*/`
`887`	`887`	`_items[index].u = 0;`
`888`		`- NSIncrementExtraRefCount(client);`
	`888`	`+ if (client)`
	`889`	`+ {`
	`890`	`+ NSIncrementExtraRefCount(client);`
	`891`	`+ }`
`889`	`892`	`}`
`890`	`893`	`else`
`891`	`894`	`{`