LD_PRELOAD=/usr/lib/libPocoFoundation.so changes the result of proof-of-
concept (Poco and boost dependent code are removed from proof-of-
concept)

$ g++ regex.cc -lpcre
$ ./a.out 
PCRE 8.31 2012-07-06
PCRE  match 1234567890 to pattern ^[0-9]{10} matches? yes
PRCE  match 123456789 to pattern ^[0-9]{10} matches? no
$ LD_PRELOAD=/usr/lib/libPocoFoundation.so ./a.out 
PCRE 8.31 2012-07-06
PCRE  match 1234567890 to pattern ^[0-9]{10} matches? yes
PRCE  match 123456789 to pattern ^[0-9]{10} matches? yes

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https://bugs.launchpad.net/bugs/1361610

Title:
  libPCRE3 8.31 regex matching is not working

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