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[cghislai <charlyghislain@xxxxxxxxx>]

I get an invalid pointer when trying to free colormap (Colormap::~Colormap at line 66)
This happens when i change to opengl rendering after having played with non-opengl graphics

Additionally, i get a crash at GLSurfaceTexture::setup_gl(), line 280. This happens when using opengl and buildings statistics. The cause seems to be the attempt to render an empty text. At SubTagRenderNode::render(SurfaceCache* surface_cache), the following code throws the exception in place of the crash:

virtual Surface* render(SurfaceCache* surface_cache) {
		if (width() == 0 && height() == 0)
			throw RT::Exception("RT render: Tried to render empty surface");

Handling special cases to prevent blitting to happen for empty text (but with rich text tags), this latter crash can be avoided.

Using trunk, i get the crash at fonthandler_1.cc:99 described in the bug report when trying to render the loading screen tip using opengl.
-- 
https://code.launchpad.net/~widelands-dev/widelands/graphic_resetting/+merge/159985
Your team Widelands Developers is requested to review the proposed merge of lp:~widelands-dev/widelands/graphic_resetting into lp:widelands.