From b2b1e7e2c3c12aecf37f33913a05125995658664 Mon Sep 17 00:00:00 2001
From: Evan Klitzke <evan@eklitzke.org>
Date: Fri, 11 May 2018 00:30:00 +0300
Subject: [PATCH] Bug 1460810 - [Gtk/Wayland] Handle error value (-1) returned
 by gtk_section_data_get_length(), r=stransky

---
 widget/gtk/nsClipboardWayland.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/widget/gtk/nsClipboardWayland.cpp b/widget/gtk/nsClipboardWayland.cpp
index a09584b976de..b7f10de70f89 100644
--- a/widget/gtk/nsClipboardWayland.cpp
+++ b/widget/gtk/nsClipboardWayland.cpp
@@ -667,8 +667,9 @@ nsRetrievalContextWayland::TransferFastTrackClipboard(
     int aClipboardRequestNumber, GtkSelectionData *aSelectionData)
 {
     if (mClipboardRequestNumber == aClipboardRequestNumber) {
-        mClipboardDataLength = gtk_selection_data_get_length(aSelectionData);
-        if (mClipboardDataLength > 0) {
+        int dataLength = gtk_selection_data_get_length(aSelectionData);
+        if (dataLength > 0) {
+            mClipboardDataLength = dataLength;
             mClipboardData = reinterpret_cast<char*>(
                 g_malloc(sizeof(char)*mClipboardDataLength));
             memcpy(mClipboardData, gtk_selection_data_get_data(aSelectionData),