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dbstop doesn't stop if the line at which is supposed to stop is something like `'else'

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Leo Simon
Leo Simon on 7 May 2020
Edited: Toder on 8 May 2020
If you save the code below to, say, mwe.m then at the command prompt type
dbstop in mwe at 4
then call the function, it will ignore the `else` line at which it is asked to stop, and continue on to the end. Is there a way to fix this problem, and make it stop at line 5 rather than 4?
function mwe
if 1 < 2;
disp('true');
else
disp('false');
end
disp('should not get to here');

Accepted Answer

Toder
Toder on 8 May 2020
Edited: Toder on 8 May 2020
The if condition is true, so Matlab executes disp('true'); then jumps to end. Lines 4 and 5 are never executed because only one block of an if-statement is ever executed, and Matlab had already determined the first block would be executed. Try
function mwe
if 3 < 2
disp('true');
else
disp('false');
end
disp('should not get to here');
This stops at line 4 with the dbstop command you used.

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