Incredibuild and “cannot create temporary il file”

This is caused by latest MS security update. After applying these two 3126587 and 3126593 previous versions of Incredibuild stopped working.

Command line error D8037 : cannot create temporary il file 

The solution is to uninstall it

On Windows 10 the responsible update is KB3135173

Next steps

Also it’s necessary to disable these updates in auto-update!


More info:–cannot-create-temporary-il-file

Crash in QTreeWidget / QTreeView index mapping on Mac OSX 10.10 part III

So, one more attempt. Previous articles (part1, part2) mentioned possible solutions to fix crash insinde the QTreeWidget and QAccessibleTableCell.

Unfortunately, deselecting current item still doesn’t fix all issues. The problem with deselection is that it’s not handled correctly via QAccessibleTableCell:

If current index isn’t valid, QAccessible doesn’t correctly update currect QAccessibleTableCell object which caused all this evil crashes.

So there are two ways how to fix it. One is to manually set QAccessibleTableCell but I didn’t find a way how to do that. The second way is to disable QAccessible for Property editor. Unfortunately it’s not an easy task. In QAccessible exists method setActive:


But this method works only with AccessibleObserver class but not with QPlatformAcessibility which handles real QAcessible::isActive result. Because of this it’s necessary to update setActive method in file qacessible.cpp inside the Qt.

Original method:

void QAccessible::setActive(bool active)
  for (int i = 0; i < qAccessibleActivationObservers()->count() ;++i)

and updated version:

void QAccessible::setActive(bool active)
    if ( QPlatformAccessibility *pfAccessibility = platformAccessibility() )

  for (int i = 0; i < qAccessibleActivationObservers()->count() ;++i)

In case you will find better way how to turn off accessibility, please let me know.

But there is still one more problem. Occasionally OS X decides to switch accessible back on:

And this is probably the reason why everything works ok on older OS X but not on 10.10. Because OS X 10.10 randomly turns accessible on which causes this crash. Accessible is usually turned on when opening some modal dialog.

This explains why opening an empty dialog increased the probability to crash the application. The only solution I have found is to disable QAccessible every time the PropertyEditor is cleared up.

Crash in QTreeWidget / QTreeView index mapping on Mac OSX 10.10

This crash took me about 40hr+ to replicate and find a way how to eliminate it (unfortunately not to fix it). This crash occurred only on OS X 10.10, not 10.9, not Linux, not Windows.


Bug occurred in slightly modified QtTreePropertyBrowser where we have additional buttons for each property.


When any of these buttons caused property tree refresh, application randomly crashed. But when these actions were executed by buttons outside of the property tree, everything worked fine.

Thread 0 Crashed:: Dispatch queue:
0   org.qt-project.QtWidgets      	0x0000000103f49290 QTreeModel::index(QTreeWidgetItem const*, int) const + 176
1   org.qt-project.QtWidgets      	0x0000000103f4950b QTreeModel::parent(QModelIndex const&) const + 75
2   org.qt-project.QtWidgets      	0x0000000103f23bb7 QTreeView::isIndexHidden(QModelIndex const&) const + 71
3   org.qt-project.QtWidgets      	0x0000000103f17e0d QTreeView::visualRect(QModelIndex const&) const + 93
4   org.qt-project.QtWidgets      	0x0000000103ec490d QAccessibleTableCell::rect() const + 29
5   org.qt-project.QtWidgets      	0x0000000103ec46f2 QAccessibleTableCell::state() const + 146
6   libqcocoa.dylib               	0x00000001071913aa QCocoaAccessible::hasValueAttribute(QAccessibleInterface*) + 58
7   libqcocoa.dylib               	0x000000010718df7e -[QMacAccessibilityElement accessibilityAttributeNames] + 398
8              	0x00007fff95dea26e NSAccessibilityEntryPointAttributeNames + 115
9              	0x00007fff95e275af -[NSObject(NSAccessibilityInternal) _accessibilityAttributeNamesClientError:] + 56
10              	0x00007fff95e2a62a CopyAttributeNames + 216
11          	0x00007fff9768cbce _AXXMIGCopyAttributeNames + 252
12          	0x00007fff976950c6 _XCopyAttributeNames + 385
13          	0x00007fff97671109 mshMIGPerform + 199
14      	0x00007fff99259c79 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 41
15      	0x00007fff99259beb __CFRunLoopDoSource1 + 475
16      	0x00007fff9924b767 __CFRunLoopRun + 2375
17      	0x00007fff9924abd8 CFRunLoopRunSpecific + 296
18           	0x00007fff9695d56f RunCurrentEventLoopInMode + 235
19           	0x00007fff9695d2ea ReceiveNextEventCommon + 431
20           	0x00007fff9695d12b _BlockUntilNextEventMatchingListInModeWithFilter + 71
21              	0x00007fff95a489bb _DPSNextEvent + 978
22              	0x00007fff95a47f68 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 346
23  libqcocoa.dylib               	0x000000010717b29d QCocoaEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 2093
24  org.qt-project.QtCore         	0x0000000104b0337d QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 381
25  org.qt-project.QtWidgets      	0x0000000103e6c192 QDialog::exec() + 514

I updated methods from signals-slots mechanism to QEvent system. Unfortunately this didn’t help as well. Next attempt was QTimer usage instead of QEvent or signal-slot to simulate real click. But also without any success.

0   org.qt-project.QtWidgets      	0x000000011112f62e QTreeModel::data(QModelIndex const&, int) const + 46
1   org.qt-project.QtWidgets      	0x00000001110aa7bb QAccessibleTableCell::state() const + 347
2   libqcocoa.dylib               	0x00000001143913aa QCocoaAccessible::hasValueAttribute(QAccessibleInterface*) + 58
3   libqcocoa.dylib               	0x000000011438df7e -[QMacAccessibilityElement accessibilityAttributeNames] + 398
4              	0x00007fff95dea26e NSAccessibilityEntryPointAttributeNames + 115
5              	0x00007fff95e275af -[NSObject(NSAccessibilityInternal) _accessibilityAttributeNamesClientError:] + 56

With a lot of luck I finally found the reason for the crash. It’s caused by erasing a property tree (and inner QTreeWidget) together with an active focus on this widget. Unfortunately I’m not able to fix it in the QtCore because according to callstack there is only some QModelIndex manipulation without any sight of what’s going wrong.


The effective solution how to fix this wrong behaviour is to temporally set focus to another widget (or parent), clear the tree and set focus back to property tree. Unfortunately this solution doesn’t work. Check part II of this article for better solution

  QWidget* pObject = qobject_cast<QWidget*>(m_propertyBrowser->parent());
  if (pObject!=NULL);

If anyone know how to fix that, I will be glad for any info.

QDialog::reject can be invoked multiple times

When user use ESC to close the dialog and press it very quickly two or more times in a row, QDialog::reject can be invoked also multiple times.

This is very dangerous and unpredictable because in case your reject will contain some one-time-execute routine the application will start crashing.

The only solution I found is to add these routines to QDialog destructor instead of to reject/accept.

Keyboard and mouse recording tools


How to update gcc to 4.8.1 on any ubuntu

Everything is perfectly explained in this post:

List of commands

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update; sudo apt-get install gcc-4.8 g++-4.8
sudo update-alternatives --remove-all gcc 
sudo update-alternatives --remove-all g++
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 20
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 20
sudo update-alternatives --config gcc
sudo update-alternatives --config g++
gcc --version


Mac OS – app can’t be opened because the identity of the developer cannot be confirmed.

Starting with OS X 10.10 existing code signing method doesn’t work. If you have application signed for 10.9 and application works without problems, with 10.10 you will get following error:


How to verify application sign status from command line:

codesign -dvvv /Applications/

Format=bundle with Mach-O thin (x86_64)
CodeDirectory v=20100 size=239848 flags=0x0(none) hashes=11986+3 location=embedded
Hash type=sha1 size=20
Signature size=4237
Authority=Developer ID Application: Inventic s.r.o. (6BYV46LH6T)
Authority=Developer ID Certification Authority
Authority=Apple Root CA
Signed Time=03 Feb 2015 17:38:21
Info.plist entries=10
TeamIdentifier=not set
Sealed Resources version=1 rules=4 files=44
Internal requirements count=1 size=300

As it’s seems from the verification output, application is correctly signed but OSX doesn’t accept it. Another way how to verify application sign status is via spctl command:

spctl --assess --type execute --verbose rejected
source=obsolete resource envelope

We have some error at least. Now it’s necessary to find out what is wrong. We can try one more test:

codesign -v resource envelope is obsolete (version 1 signature)

where we dest little bit more details. All these errors we get only on 10.10 mac, not on 10.9 or older.

After another investigation I found following article. The most important part is:

“Important: For your apps to run on updated versions of OSX they must be signed on OS X version 10.9 or later and thus have a version 2 signature.”

Another post about this topic is in blog.

So ,it’s bad. We need to update our build machine to 10.9 or at least create new “sign machine” and make sure that everything will work as expected.

Additional links

Disable sudo password on Jenkins build machines

edit file sudoers

sudo nano /etc/sudoers


sudo visudo

and modify

%sudo ALL=(ALL) ALL



and add following line to the end of the file:


Be careful!

When editing sudoers, it’s necessary to be very careful. Any error cause that you will not be able to edit this file anymore and also not to use sudo ;-).

Here are links how to fix it (verified 😉 )

Remote links

Enabling SSL on Mongoose http server



pstrReturn = mg_set_option(serverHttps, "listening_port", "ssl://443:ssl.pem");  // Open port 443 with ssl.pem certificate


# openssl version
OpenSSL 1.0.0-beta2 21 Apr 2009

# openssl req -x509 -newkey rsa:2048 -keyout key.pem -out cert.pem -days 1000 -nodes

# cat key.pem > ssl.pem; cat cert.pem >> ssl.pem

Testing mongoose server via command line (curl), Switch -k allow to use self-signed certificates.

curl -X OPTIONS --header "Access-Control-Request-Method:GET" --header "Access-Control-Request-Headers: accept, x-coral-api-key" https://server.a18/v1/service/method -k

UML tools and c++ code generators

List of UML modellers

UML tools