matlab program crashes matlab2cpp

[mathog]

Greetings.

Attempting to convert fgap.m (not my code, it was written by Vitor Piro and is available here:
https://github.com/pirovc/fgap
) to cpp using matlab2.cpp. After installing the latter using whatever version was downloading on Feb 18, 2018 at 22:18 PST

m2cpp fgap.m

didn't like code like this:

blah.part(a==b) = 1;

so those all had to be converted manually to

   if (a==b)
      blah.part = 1;
   end

It also seemed to become confused on some complex [ ] strings, where spaces between variables/strings
had to be replaced with commas. Once all that was done, m2cpp no longer issued any warnings, instead it crashed on a run like so:

 m2cpp fgap.m
Traceback (most recent call last):
  File "/usr/local/bin/m2cpp", line 11, in <module>
    sys.exit(m2cpp())
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/__init__.py", line 62, in m2cpp
    execute_parser(args)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/frontend.py", line 126, in execute_parser
    builder.load(filename, code)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/builder.py", line 165, in load
    self.create_program(name)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/builder.py", line 375, in create_program
    return functions.program(self, name)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/functions.py", line 95, in program
    cur = self.create_function(funcs, cur)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/builder.py", line 401, in create_function
    return functions.function(self, parent, cur)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/functions.py", line 313, in function
    cur = self.create_codeblock(func, cur)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/builder.py", line 520, in create_codeblock
    return codeblock.codeblock(self, parent, cur)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/codeblock.py", line 132, in codeblock
    cur = self.create_for(block, cur)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/builder.py", line 615, in create_for
    return branches.forloop(self, parent, cur)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/branches.py", line 463, in forloop
    end = self.create_codeblock(for_loop, cur)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/builder.py", line 520, in create_codeblock
    return codeblock.codeblock(self, parent, cur)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/codeblock.py", line 186, in codeblock
    cur = self.create_assign(block, cur, eq_loc)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/builder.py", line 570, in create_assign
    return assign.single(self, parent, cur, eq_loc)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/assign.py", line 137, in single
    end = findend.expression(self, j)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 58, in expression
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 197, in matrix
    k = matrix(self, k)
  File "/usr/local/lib/python2.7/site-packages/matlab2cpp/tree/findend.py", line 196, in matrix
    if self.code[k] == "[":
IndexError: string index out of range

The toxic form of fgap.m, compressed to allow the upload, should be available at the following link:

fgap.m.gz

The original form, before the modifications above, just in case V.P. updated the version on github, was here:

fgap.m.dist.gz