260510.142745.CST [skip ci] try whether the crash "ERROR: MATLAB error Exit Status: 0xc0000409" still happens if we ensure iprint >= 0

Author: zaikunzhang

.github/workflows/test_matlab_windows.yml

@@ -125,5 +125,6 @@ jobs:
             test_classical = true;
             % With MinGW, if we set verbose to true, MATLAB will crash with the message "ERROR: MATLAB error Exit Status: 0xc0000409".
             % To be investigated whether this is a bug of MATLAB or MinGW. Setting verbose to false is a workaround.
-            verbose = ~strcmpi('${{ matrix.compiler }}', 'mingw');
+            %verbose = ~strcmpi('${{ matrix.compiler }}', 'mingw');
+            verbose = true;  % For test
             testprima_ex(test_classical, verbose);

matlab/tests/testprima.m

@@ -136,6 +136,7 @@ function testprima(release, precision, nrun, test_classical, verbose)
                     options.solver = solver;
                     options.classical = clflag;
                     options.iprint = round(4*(2*rand() - 1)) * verbose;
+                    options.iprint = abs(options.iprint); % For test
                     problem.options = options;
 
                     switch type