Catastrophic backtracking in regexp

slowregexp.py

# For some reason does not work when copied-an-pasted not as raw file, but otherwise shoudl hang
import re
pat=re.compile('\\.\\. (code-block|math)::.*$\\n*(?P<S2VCUH>(?P<first>(^(?P<indent>[ ]+).*$\\n))(?P<other>(^([ \\t]+.*|[ \\t]*)$\\n)*))(?:(^(?![ \\t]+.*$))|\\Z)', re.MULTILINE)
text="""#####################################################################
 We get the following performance profiling table for the eager-mode model (omitting some columns):

 .. code-block:: shell

     -------------------------  ------------  ------------  ------------  ------------  
                          Name   CPU total %     CPU total  CPU time avg    # of Calls  
     -------------------------  ------------  ------------  ------------  ------------  
                   aten::addmm        45.73%     370.814ms       1.024ms           362  
                     aten::add        19.89%     161.276ms     444.287us           363  
                   aten::copy_        14.97%     121.416ms     248.803us           488  
                     aten::mul         9.02%      73.154ms     377.082us           194  
               aten::clamp_min         8.81%      71.444ms     744.208us            96  
                     aten::bmm         5.46%      44.258ms     922.042us            48  
                 ProfilerStep*       100.00%     810.920ms     810.920ms             1  
                     aten::div         2.89%      23.447ms     976.958us            24  
                aten::_softmax         1.00%       8.087ms     336.958us            24  
                  aten::linear        46.48%     376.888ms       1.041ms           362  
                   aten::clone         2.77%      22.430ms     228.878us            98  
                       aten::t         0.31%       2.502ms       6.912us           362  
                    aten::view         0.14%       1.161ms       1.366us           850  
               aten::transpose         0.17%       1.377ms       3.567us           386  
            aten::index_select         0.12%     952.000us     317.333us             3  
                  aten::expand         0.12%     986.000us       2.153us           458  
                  aten::matmul         8.31%      67.420ms       1.405ms            48  
                     aten::cat         0.09%     703.000us     703.000us             1  
              aten::as_strided         0.08%     656.000us       0.681us           963  
                    aten::relu         8.86%      71.864ms     748.583us            96  
     -------------------------  ------------  ------------  ------------  ------------  
     Self CPU time total: 810.920ms """
print(pat.match(text, pos=172))