pcre2.exceptions.CompileError: Compilation failed at position 743. Regular expression is too large

[xinghaiquedeng]

Good day.
When I parse the regular expression with pcre2, I get the following error：
patn = pcre2.compile(expr, options=pcre2.I, jit=True)
File "methods.pyx", line 40, in pcre2.methods.compile
File "utils.pyx", line 102, in pcre2.utils.raise_from_rc
pcre2.exceptions.CompileError: Compilation failed at position 743. Regular expression is too large

Here's my regular expression:
expr = r'((((6553[0-5]|655[0-2][0-9]|65[0-4][0-9]{2}|6[0-4][0-9]{3}|[1-5][0-9]{4}|[1-9][0-9]{0,3}).(6553[0-5]|655[0-2][0-9]|65[0-4][0-9]{2}|6[0-4][0-9]{3}|[1-5][0-9]{4}|[1-9][0-9]{0,3}|0))|(([1-9]\d{0,8})|([1-3]\d{9})|(4[0-1]\d{8})|(42[0-8]\d{7})|(429[0-3]\d{6})|(4294[0-8]\d{5})|(42949[0-5]\d{4})|(429496[0-6]\d{3})|(4294967[0-1]\d{2})|(42949672[0-8]\d{1})|(429496729[0-5])))( ((6553[0-5]|655[0-2][0-9]|65[0-4][0-9]{2}|6[0-4][0-9]{3}|[1-5][0-9]{4}|[1-9][0-9]{0,3}).(6553[0-5]|655[0-2][0-9]|65[0-4][0-9]{2}|6[0-4][0-9]{3}|[1-5][0-9]{4}|[1-9][0-9]{0,3}|0))| (([1-9]\d{0,8})|([1-3]\d{9})|(4[0-1]\d{8})|(42[0-8]\d{7})|(429[0-3]\d{6})|(4294[0-8]\d{5})|(42949[0-5]\d{4})|(429496[0-6]\d{3})|(4294967[0-1]\d{2})|(42949672[0-8]\d{1})|(429496729[0-5]))){0,255})'

[PhilipHazel]

This is an extract from the "pcre2limits" documentation page:

"The maximum size of a compiled pattern is approximately 64 thousand code units for the 8-bit and 16-bit libraries if PCRE2 is compiled with the default internal linkage size, which is 2 bytes for these libraries. If you want to process regular expressions that are truly enormous, you can compile PCRE2 with an internal linkage size of 3 or 4 (when building the 16-bit library, 3 is rounded up to 4). See the README file in the source distribution and the pcre2build documentation for details. In these cases the limit is substantially larger. However, the speed of execution is slower. In the 32-bit library, the internal linkage size is always 4."

[PhilipHazel]

Closing this issue.