From c3c07a5f4bed7fea98ad07ca1cce34c9e5409f0b Mon Sep 17 00:00:00 2001
From: Soeren Apel <soeren@apelpie.net>
Date: Wed, 18 Nov 2020 19:09:41 +0100
Subject: [PATCH] Prevent Qt from crashing PV by only showing the first error

---
 pv/dialogs/storeprogress.cpp | 8 +++++---
 pv/dialogs/storeprogress.hpp | 3 +++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/pv/dialogs/storeprogress.cpp b/pv/dialogs/storeprogress.cpp
index 2bca3476..8699ccef 100644
--- a/pv/dialogs/storeprogress.cpp
+++ b/pv/dialogs/storeprogress.cpp
@@ -43,7 +43,8 @@ StoreProgress::StoreProgress(const QString &file_name,
 	const Session &session, QWidget *parent) :
 	QProgressDialog(tr("Saving..."), tr("Cancel"), 0, 0, parent),
 	session_(file_name.toStdString(), output_format, options, sample_range,
-		session)
+		session),
+	showing_error_(false)
 {
 	connect(&session_, SIGNAL(progress_updated()),
 		this, SLOT(on_progress_updated()));
@@ -79,6 +80,8 @@ void StoreProgress::run()
 
 void StoreProgress::show_error()
 {
+	showing_error_ = true;
+
 	qDebug() << "Error trying to save:" << session_.error();
 
 	QMessageBox msg(parentWidget());
@@ -109,9 +112,8 @@ void StoreProgress::on_progress_updated()
 		setMaximum(p.second);
 	} else {
 		const QString err = session_.error();
-		if (!err.isEmpty())
+		if (!err.isEmpty() && !showing_error_)
 			show_error();
-		close();
 	}
 }
 
diff --git a/pv/dialogs/storeprogress.hpp b/pv/dialogs/storeprogress.hpp
index fd355899..730a9e42 100644
--- a/pv/dialogs/storeprogress.hpp
+++ b/pv/dialogs/storeprogress.hpp
@@ -20,6 +20,7 @@
 #ifndef PULSEVIEW_PV_DIALOGS_STOREPROGRESS_HPP
 #define PULSEVIEW_PV_DIALOGS_STOREPROGRESS_HPP
 
+#include <atomic>
 #include <memory>
 #include <set>
 
@@ -27,6 +28,7 @@
 
 #include <pv/storesession.hpp>
 
+using std::atomic;
 using std::map;
 using std::pair;
 using std::shared_ptr;
@@ -63,6 +65,7 @@ private Q_SLOTS:
 
 private:
 	pv::StoreSession session_;
+	atomic<bool> showing_error_;
 };
 
 }  // namespace dialogs
-- 
2.30.2