diff --git a/src/plugins/debugger/debuggerdialogs.cpp b/src/plugins/debugger/debuggerdialogs.cpp
index 46cbc7ba76b..1b34ae84fcd 100644
--- a/src/plugins/debugger/debuggerdialogs.cpp
+++ b/src/plugins/debugger/debuggerdialogs.cpp
@@ -375,6 +375,7 @@ bool StartApplicationDialog::run(QWidget *parent, QSettings *settings, DebuggerS
     }
 
     Profile *profile = dialog.d->profileChooser->currentProfile();
+    QTC_ASSERT(profile, return false);
     fillParameters(sp, profile);
 
     sp->executable = newParameters.localExecutable;
diff --git a/src/plugins/debugger/debuggerplugin.cpp b/src/plugins/debugger/debuggerplugin.cpp
index 6c254b27a2e..87ae97d8ee0 100644
--- a/src/plugins/debugger/debuggerplugin.cpp
+++ b/src/plugins/debugger/debuggerplugin.cpp
@@ -1702,10 +1702,12 @@ void DebuggerPluginPrivate::attachToQmlPort()
     if (dlg.exec() != QDialog::Accepted)
         return;
 
+    Profile *profile = dlg.profile();
+    QTC_ASSERT(profile, return);
     setConfigValue(_("LastQmlServerPort"), dlg.port());
-    setConfigValue(_("LastProfile"), dlg.profile()->id().toString());
+    setConfigValue(_("LastProfile"), profile->id().toString());
 
-    fillParameters(&sp, dlg.profile());
+    fillParameters(&sp, profile);
     sp.qmlServerAddress = sp.connParams.host;
     sp.qmlServerPort = dlg.port();
     sp.startMode = AttachToRemoteProcess;
diff --git a/src/plugins/debugger/debuggerprofileinformation.cpp b/src/plugins/debugger/debuggerprofileinformation.cpp
index bda8c41c5e0..f794bbc6342 100644
--- a/src/plugins/debugger/debuggerprofileinformation.cpp
+++ b/src/plugins/debugger/debuggerprofileinformation.cpp
@@ -37,6 +37,7 @@
 #include <projectexplorer/toolchain.h>
 
 #include <utils/environment.h>
+#include <utils/qtcassert.h>
 
 #include <QDir>
 #include <QPair>
@@ -213,11 +214,12 @@ ProfileInformation::ItemList DebuggerProfileInformation::toUserOutput(Profile *p
 
 FileName DebuggerProfileInformation::debuggerCommand(const Profile *p)
 {
-    return FileName::fromString(p->value(Core::Id(DEBUGGER_INFORMATION)).toString());
+    return FileName::fromString(p ? p->value(Core::Id(DEBUGGER_INFORMATION)).toString() : QString());
 }
 
 void DebuggerProfileInformation::setDebuggerCommand(Profile *p, const FileName &command)
 {
+    QTC_ASSERT(p, return);
     p->setValue(Core::Id(DEBUGGER_INFORMATION), command.toString());
 }
 
diff --git a/src/plugins/projectexplorer/profilechooser.cpp b/src/plugins/projectexplorer/profilechooser.cpp
index 03d602efe77..da73a5f1465 100644
--- a/src/plugins/projectexplorer/profilechooser.cpp
+++ b/src/plugins/projectexplorer/profilechooser.cpp
@@ -50,6 +50,8 @@ void ProfileChooser::onCurrentIndexChanged(int index)
 {
     if (Profile *profile = profileAt(index))
         setToolTip(profile->toHtml());
+    else
+        setToolTip(QString());
 }
 
 void ProfileChooser::populate(unsigned flags)
@@ -78,7 +80,8 @@ void ProfileChooser::populate(unsigned flags)
 
 Profile *ProfileChooser::currentProfile() const
 {
-    return profileAt(currentIndex());
+    const int index = currentIndex();
+    return index == -1 ? 0 : profileAt(index);
 }
 
 void ProfileChooser::setCurrentProfileId(Core::Id id)
@@ -93,7 +96,8 @@ void ProfileChooser::setCurrentProfileId(Core::Id id)
 
 Core::Id ProfileChooser::currentProfileId() const
 {
-    return profileAt(currentIndex())->id();
+    Profile *profile = currentProfile();
+    return profile ? profile->id() : Core::Id();
 }
 
 Profile *ProfileChooser::profileAt(int index) const