Before:
  runtime ale_linters/ispc/ispc.vim

After:
  call ale#linter#Reset()

Execute(The ispc handler should parse input correctly):
  AssertEqual
  \ [
  \   {
  \     'bufnr': 0,
  \     'lnum': 33,
  \     'col': 14,
  \     'type': 'E',
  \     'text': 'syntax error, unexpected ''int'', expecting '','' or '';''.',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 36,
  \     'col': 5,
  \     'type': 'E',
  \     'text': 'syntax error, unexpected ''for''.',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 40,
  \     'col': 24,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "z_re".',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 40,
  \     'col': 29,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "z_re".',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 40,
  \     'col': 36,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "z_im".',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 40,
  \     'col': 41,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "z_im".',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 41,
  \     'col': 30,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "z_re".',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 41,
  \     'col': 37,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "z_im".',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 42,
  \     'col': 18,
  \     'type': 'E',
  \     'text': 'syntax error, unexpected ''{''.',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 58,
  \     'col': 17,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "y1". Did you mean "i", or "or"?',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 58,
  \     'col': 22,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "y0". Did you mean "i", or "or"?',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 58,
  \     'col': 28,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "height".',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 60,
  \     'col': 5,
  \     'type': 'E',
  \     'text': 'syntax error, unexpected ''for''.',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 71,
  \     'col': 23,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "y0". Did you mean "dy", or "i", or "or"?',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 71,
  \     'col': 28,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "j". Did you mean "i"?',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 73,
  \     'col': 25,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "j". Did you mean "i", or "y"?',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 73,
  \     'col': 29,
  \     'type': 'E',
  \     'text': 'Undeclared symbol "width".',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 74,
  \     'col': 13,
  \     'type': 'E',
  \     'text': 'syntax error, unexpected identifier.',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 51,
  \     'col': 9,
  \     'type': 'E',
  \     'text': '''foobar.h'' file not found',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 79,
  \     'col': 52,
  \     'type': 'W',
  \     'text': 'Modulus operator with varying types is very inefficient.',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 85,
  \     'col': 13,
  \     'type': 'W',
  \     'text': 'Undefined behavior: all program instances are writing to the same location!',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 93,
  \     'col': 19,
  \     'type': 'W',
  \     'text': 'Gather required to load value.',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \   {
  \     'bufnr': 0,
  \     'lnum': 93,
  \     'col': 9,
  \     'type': 'W',
  \     'text': 'Scatter required to store value.',
  \     'filename': has('win32')
  \       ? 'C:\testplugin\test\handler\mandelbrot.ispc'
  \       : '/testplugin/test/handler/mandelbrot.ispc',
  \   },
  \ ],
  \ ale_linters#ispc#ispc#Handle(0, [
  \   'Warning: No output file or header file name specified. Program will ',
  \   '        be compiled and warnings/errors will be issued, but no output will be ',
  \   '        generated. ',
  \   'Warning: No --target specified on command-line. Using default system ',
  \   '        target "avx2-i32x8". ',
  \   'mandelbrot.ispc:33:14: Error: syntax error, unexpected ''int'', ',
  \   '        expecting '','' or '';''. ',
  \   'static iline int mandel(float c_re, float c_im, int count) {',
  \   '             ^^^',
  \   '',
  \   'mandelbrot.ispc:36:5: Error: syntax error, unexpected ''for''. ',
  \   '    for (i = 0; i < count; ++i) {',
  \   '    ^^^',
  \   '',
  \   'mandelbrot.ispc:40:24: Error: Undeclared symbol "z_re". ',
  \   '        float new_re = z_re*z_re - z_im*z_im;',
  \   '                       ^^^^',
  \   '',
  \   'mandelbrot.ispc:40:29: Error: Undeclared symbol "z_re". ',
  \   '        float new_re = z_re*z_re - z_im*z_im;',
  \   '                            ^^^^',
  \   '',
  \   'mandelbrot.ispc:40:36: Error: Undeclared symbol "z_im". ',
  \   '        float new_re = z_re*z_re - z_im*z_im;',
  \   '                                   ^^^^',
  \   '',
  \   'mandelbrot.ispc:40:41: Error: Undeclared symbol "z_im". ',
  \   '        float new_re = z_re*z_re - z_im*z_im;',
  \   '                                        ^^^^',
  \   '',
  \   'mandelbrot.ispc:41:30: Error: Undeclared symbol "z_re". ',
  \   '        float new_im = 2.f * z_re * z_im;',
  \   '                             ^^^^',
  \   '',
  \   'mandelbrot.ispc:41:37: Error: Undeclared symbol "z_im". ',
  \   '        float new_im = 2.f * z_re * z_im;',
  \   '                                    ^^^^',
  \   '',
  \   'mandelbrot.ispc:42:18: Error: syntax error, unexpected ''{''. ',
  \   '        unmasked {',
  \   '                 ^',
  \   '',
  \   'mandelbrot.ispc:58:17: Error: Undeclared symbol "y1". Did you mean ',
  \   '        "i", or "or"? ',
  \   '    float dy = (y1 - y0) / height;',
  \   '                ^^',
  \   '',
  \   'mandelbrot.ispc:58:22: Error: Undeclared symbol "y0". Did you mean ',
  \   '        "i", or "or"? ',
  \   '    float dy = (y1 - y0) / height;',
  \   '                     ^^',
  \   '',
  \   'mandelbrot.ispc:58:28: Error: Undeclared symbol "height". ',
  \   '    float dy = (y1 - y0) / height;',
  \   '                           ^^^^^^',
  \   '',
  \   'mandelbrot.ispc:60:5: Error: syntax error, unexpected ''for''. ',
  \   '    for (uniform int j = 0; j < height; j++) {',
  \   '    ^^^',
  \   '',
  \   'mandelbrot.ispc:71:23: Error: Undeclared symbol "y0". Did you mean ',
  \   '        "dy", or "i", or "or"? ',
  \   '            float y = y0 + j * dy;',
  \   '                      ^^',
  \   '',
  \   'mandelbrot.ispc:71:28: Error: Undeclared symbol "j". Did you mean ',
  \   '        "i"? ',
  \   '            float y = y0 + j * dy;',
  \   '                           ^',
  \   '',
  \   'mandelbrot.ispc:73:25: Error: Undeclared symbol "j". Did you mean ',
  \   '        "i", or "y"? ',
  \   '            int index = j * width + i;',
  \   '                        ^',
  \   '',
  \   'mandelbrot.ispc:73:29: Error: Undeclared symbol "width". ',
  \   '            int index = j * width + i;',
  \   '                            ^^^^^',
  \   '',
  \   'mandelbrot.ispc:74:13: Error: syntax error, unexpected ',
  \   '        identifier. ',
  \   '            output[index] = mandel(x, y, maxIterations);',
  \   '            ^^^^^^',
  \   '',
  \   'mandelbrot.ispc:51:9: fatal error: ''foobar.h'' file not found',
  \   '#include<foobar.h>',
  \   '        ^~~~~~~~~~',
  \   'mandelbrot.ispc:79:52: Performance Warning: Modulus operator with ',
  \   '        varying types is very inefficient. ',
  \   '                double x = x0 + i * (dx + epsilon*(k%2)*delta);',
  \   '                                                   ^^^',
  \   '',
  \   'mandelbrot.ispc:85:13: Warning: Undefined behavior: all program ',
  \   '        instances are writing to the same location! ',
  \   '            output[index] = (NNN) / sample_size;',
  \   '            ^^^^^^^^^^^^^',
  \   '',
  \   'mandelbrot.ispc:93:19: Performance Warning: Gather required to load value. ',
  \   '        A[i*8] *= A[i*8];',
  \   '                  ^^^^^^',
  \   '',
  \   'mandelbrot.ispc:93:9: Performance Warning: Scatter required to store value. ',
  \   '        A[i*8] *= A[i*8];',
  \   '        ^^^^^^',
  \   '',
  \ ])