--- a/ChangeLog.txt	Thu Apr 25 21:25:16 2019 +0200
+++ b/ChangeLog.txt	Thu Apr 25 23:01:05 2019 +0200
@@ -93,6 +93,7 @@
  + More intelligent automatic mission selection in campaign screen
  * Fix force-locked schemes getting unlocked when changing map types
  * Fix possible to select background-only or hidden themes indirectly by changing map type
+ * Disallow slash, backslash and colon characters in team and scheme names
 
 Sounds and voicepacks:
  + sndYoohoo has been split to sndYoohoo and sndKiss

--- a/QTfrontend/hwconsts.cpp.in	Thu Apr 25 21:25:16 2019 +0200
+++ b/QTfrontend/hwconsts.cpp.in	Thu Apr 25 23:01:05 2019 +0200
@@ -34,6 +34,8 @@
 QString * cRevisionString = new QString("${HEDGEWARS_REVISION}");
 QString * cHashString = new QString("${HEDGEWARS_HASH}");
 
+// For disallowing some characters that would screw up file name
+QString * cSafeFileNameRegExp = new QString("[^:/\\\\]*");
 
 QDir * bindir = new QDir();
 QDir * cfgdir = new QDir();

--- a/QTfrontend/hwconsts.h	Thu Apr 25 21:25:16 2019 +0200
+++ b/QTfrontend/hwconsts.h	Thu Apr 25 23:01:05 2019 +0200
@@ -28,6 +28,7 @@
 extern QString * cRevisionString;
 extern QString * cHashString;
 extern QString * cDataDir;
+extern QString * cSafeFileNameRegExp;
 
 extern QDir * bindir;
 extern QDir * cfgdir;

--- a/QTfrontend/ui/page/pageeditteam.cpp	Thu Apr 25 21:25:16 2019 +0200
+++ b/QTfrontend/ui/page/pageeditteam.cpp	Thu Apr 25 23:01:05 2019 +0200
@@ -28,9 +28,12 @@
 #include <QMessageBox>
 #include <QStandardItemModel>
 #include <QDebug>
+#include <QRegExp>
+#include <QRegExpValidator>
 #include "SquareLabel.h"
 #include "HWApplication.h"
 #include "keybinder.h"
+#include "hwconsts.h"
 
 #include "physfs.h"
 #include "DataManager.h"
@@ -129,6 +132,9 @@
     TeamNameEdit->setMaxLength(64);
     TeamNameEdit->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
     TeamNameEdit->setStyleSheet("QLineEdit { padding: 6px; }");
+    QRegExp rx(*cSafeFileNameRegExp);
+    QRegExpValidator * val = new QRegExpValidator(rx, TeamNameEdit);
+    TeamNameEdit->setValidator(val);
     GBTLayout->addWidget(TeamNameEdit, 0, 1, 1, 2);
     vbox2->addWidget(GBoxTeam);
 

--- a/QTfrontend/ui/page/pagescheme.cpp	Thu Apr 25 21:25:16 2019 +0200
+++ b/QTfrontend/ui/page/pagescheme.cpp	Thu Apr 25 23:01:05 2019 +0200
@@ -26,7 +26,10 @@
 #include <QMessageBox>
 #include <QDataWidgetMapper>
 #include <QSpinBox>
+#include <QRegExp>
+#include <QRegExpValidator>
 
+#include "hwconsts.h"
 #include "gameSchemeModel.h"
 #include "pagescheme.h"
 #include "FreqSpinBox.h"
@@ -517,6 +520,9 @@
     L_name->setText(QLabel::tr("Scheme Name:"));
 
     LE_name = new QLineEdit(this);
+    QRegExp rx(*cSafeFileNameRegExp);
+    QRegExpValidator * val = new QRegExpValidator(rx, LE_name);
+    LE_name->setValidator(val);
     LE_name->setWhatsThis(tr("Name of this scheme"));
 
     gl->addWidget(LE_name,15,1,1,5);

--- a/QTfrontend/ui/widget/selectWeapon.cpp	Thu Apr 25 21:25:16 2019 +0200
+++ b/QTfrontend/ui/widget/selectWeapon.cpp	Thu Apr 25 23:01:05 2019 +0200
@@ -31,6 +31,9 @@
 #include <QSettings>
 #include <QMessageBox>
 #include <QTabWidget>
+#include <QRegExp>
+#include <QRegExpValidator>
+
 #include <math.h>
 
 QImage getAmmoImage(int num)
@@ -205,6 +208,9 @@
 
     //pLayout->setRowStretch(5, 100);
     m_name = new QLineEdit(this);
+    QRegExp rx(*cSafeFileNameRegExp);
+    QRegExpValidator* val = new QRegExpValidator(rx, m_name);
+    m_name->setValidator(val);
     pageLayout->addWidget(m_name, i, 0, 1, 5);
 }
 

--- a/share/hedgewars/Data/Names/README.md	Thu Apr 25 21:25:16 2019 +0200
+++ b/share/hedgewars/Data/Names/README.md	Thu Apr 25 23:01:05 2019 +0200
@@ -42,7 +42,9 @@
 * Each hog of this team gets a random hat of this list. Repeat a hat name to
   jack up its probability.
 
-Each team is again separated by a separator line.
+Each team is again separated by a separator line. The team name must not
+contain characters that would be forbidden in a file name (such as “/”,
+“\” or “:”).
 
 At the end of the final team, this line must be written (without the spaces):