Keep Matlab from stepping into built in functions during dbstop if error
I use dbstop error a lot when working in Matlab. A good portion of the time, a mistake causes errors to be thrown inside of built-in [m-file] functions, which then causes Matlab to stop execution and open the file. However, it's almost never helpful to debug inside of the built-in file, so this ends up disrupting my workflow. Might there be a way to set things up so that Matlab backs out of the built-in file in the debugger (never opening it), leaving me at the function call?
Although I've never found a way to tackle this problem properly, it's fairly easy to hack together a workaround:
Create a script containing something along these lines:
S = dbstack();
file_paths = cellfun(@which, {S.file}, 'UniformOutput', false);
builtins = ~cellfun('isempty', strfind(file_paths, matlabroot()));
stack_depth = find(~builtins, 1, 'first');
for ii = 1:stack_depth-1
dbup(); end
Save it somewhere that makes sense to you, and place a shortcut to it in the MATLAB toolbar.
Then, whenever this problem occurs, you just click on your little shortcut, which will automatically take you to the first non-builtin function in the debug stack.
Based on Rody's answer and feedback from Mathworks, this is the closest you can get at this point (R2016b):
S = dbstack('-completenames');
builtins = ~cellfun('isempty', strfind({S(:).file}, matlabroot()));
stack_depth = find(~builtins, 1, 'first');
hDocument = matlab.desktop.editor.findOpenDocument(S(1).file);
matlab.desktop.editor.openAndGoToLine(S(stack_depth).file,S(stack_depth).line);
hDocument.close();
if stack_depth == 2
dbup();
end
This shortcut will:
The problem is that dbup() only works once - after the call, execution in the script stops. There's no function to switch to an arbitrary place in the stack.
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