Log message:
Pullup ticket #4864 - requested by wiz
devel/pcre: security fix

Revisions pulled up:
- devel/pcre/Makefile                                           1.77
- devel/pcre/distinfo                                           1.58

---
   Module Name:	pkgsrc
   Committed By:	wiz
   Date:		Tue Nov 24 11:04:03 UTC 2015

   Modified Files:
   	pkgsrc/devel/pcre: Makefile distinfo

   Log message:
   Update pcre to 8.38:

   Version 8.38 23-November-2015
   -----------------------------

   1.  If a group that contained a recursive back reference also contained a
       forward reference subroutine call followed by a non-forward-reference
       subroutine call, for example /.((?2)(?R)\1)()/, pcre2_compile() failed to
       compile correct code, leading to undefined behaviour or an internally
       detected error. This bug was discovered by the LLVM fuzzer.

   2.  Quantification of certain items (e.g. atomic back references) could cause
       incorrect code to be compiled when recursive forward references were
       involved. For example, in this pattern: /(?1)()((((((\1++))\x85)+)|))/.
       This bug was discovered by the LLVM fuzzer.

   3.  A repeated conditional group whose condition was a reference by name caused
       a buffer overflow if there was more than one group with the given name.
       This bug was discovered by the LLVM fuzzer.

   4.  A recursive back reference by name within a group that had the same name as
       another group caused a buffer overflow. For example:
       /(?J)(?'d'(?'d'\g{d}))/. This bug was discovered by the LLVM fuzzer.

   5.  A forward reference by name to a group whose number is the same as the
       current group, for example in this pattern: /(?|(\k'Pm')|(?'Pm'))/, caused
       a buffer overflow at compile time. This bug was discovered by the LLVM
       fuzzer.

   6.  A lookbehind assertion within a set of mutually recursive subpatterns could
       provoke a buffer overflow. This bug was discovered by the LLVM fuzzer.

   7.  Another buffer overflow bug involved duplicate named groups with a
       reference between their definition, with a group that reset capture
       numbers, for example: /(?J:(?|(?'R')(\k'R')|((?'R'))))/. This has been
       fixed by always allowing for more memory, even if not needed. (A proper fix
       is implemented in PCRE2, but it involves more refactoring.)

   8.  There was no check for integer overflow in subroutine calls such as (?123).

   9.  The table entry for \l in EBCDIC environments was incorrect, leading to its
       being treated as a literal 'l' instead of causing an error.

   10. There was a buffer overflow if pcre_exec() was called with an ovector of
       size 1. This bug was found by american fuzzy lop.

   11. If a non-capturing group containing a conditional group that could match
       an empty string was repeated, it was not identified as matching an empty
       string itself. For example: /^(?:(?(1)x|)+)+$()/.

   12. In an EBCDIC environment, pcretest was mishandling the escape sequences
       \a and \e in test subject lines.

   13. In an EBCDIC environment, \a in a pattern was converted to the ASCII
       instead of the EBCDIC value.

   14. The handling of \c in an EBCDIC environment has been revised so that it is
       now compatible with the specification in Perl's perlebcdic page.

   15. The EBCDIC character 0x41 is a non-breaking space, equivalent to 0xa0 in
       ASCII/Unicode. This has now been added to the list of characters that are
       recognized as white space in EBCDIC.

   16. When PCRE was compiled without UCP support, the use of \p and \P gave an
       error (correctly) when used outside a class, but did not give an error
       within a class.

   17. \h within a class was incorrectly compiled in EBCDIC environments.

   18. A pattern with an unmatched closing parenthesis that contained a backward
       assertion which itself contained a forward reference caused buffer
       overflow. And example pattern is: /(?=di(?<=(?1))|(?=(.))))/.

   19. JIT should return with error when the compiled pattern requires more stack
       space than the maximum.

   20. A possessively repeated conditional group that could match an empty string,
       for example, /(?(R))*+/, was incorrectly compiled.

   21. Fix infinite recursion in the JIT compiler when certain patterns such as
       /(?:|a|){100}x/ are analysed.

   22. Some patterns with character classes involving [: and \\ were incorrectly
       compiled and could cause reading from uninitialized memory or an incorrect
       error diagnosis.

   23. Pathological patterns containing many nested occurrences of [: caused
       pcre_compile() to run for a very long time.

   24. A conditional group with only one branch has an implicit empty alternative
       branch and must therefore be treated as potentially matching an empty
       string.

   25. If (?R was followed by - or + incorrect behaviour happened instead of a
       diagnostic.

   26. Arrange to give up on finding the minimum matching length for overly
       complex patterns.

   27. Similar to (4) above: in a pattern with duplicated named groups and an
       occurrence of (?| it is possible for an apparently non-recursive back
       reference to become recursive if a later named group with the relevant
       number is encountered. This could lead to a buffer overflow. Wen Guanxing
       from Venustech ADLAB discovered this bug.

   28. If pcregrep was given the -q option with -c or -l, or when handling a
       binary file, it incorrectly wrote output to stdout.

   29. The JIT compiler did not restore the control verb head in case of *THEN
       control verbs. This issue was found by Karl Skomski with a custom LLVM
       fuzzer.

   30. Error messages for syntax errors following \g and \k were giving inaccurate
       offsets in the pattern.

   31. Added a check for integer overflow in conditions (?(<digits>) and
       (?(R<digits>). This omission was discovered by Karl Skomski with \ 
the LLVM
       fuzzer.

   32. Handling recursive references such as (?2) when the reference is to a group
       later in the pattern uses code that is very hacked about and error-prone.
       It has been re-written for PCRE2. Here in PCRE1, a check has been added to
       give an internal error if it is obvious that compiling has gone wrong.

   33. The JIT compiler should not check repeats after a {0,1} repeat byte code.
       This issue was found by Karl Skomski with a custom LLVM fuzzer.

   34. The JIT compiler should restore the control chain for empty possessive
       repeats. This issue was found by Karl Skomski with a custom LLVM fuzzer.

   35. Match limit check added to JIT recursion. This issue was found by Karl
       Skomski with a custom LLVM fuzzer.

   36. Yet another case similar to 27 above has been circumvented by an
       unconditional allocation of extra memory. This issue is fixed \ 
"properly" in
       PCRE2 by refactoring the way references are handled. Wen Guanxing
       from Venustech ADLAB discovered this bug.

   37. Fix two assertion fails in JIT. These issues were found by Karl Skomski
       with a custom LLVM fuzzer.

   38. Fixed a corner case of range optimization in JIT.

   39. An incorrect error "overran compiling workspace" was given if \ 
there were
       exactly enough group forward references such that the last one extended
       into the workspace safety margin. The next one would have expanded the
       workspace. The test for overflow was not including the safety margin.

   40. A match limit issue is fixed in JIT which was found by Karl Skomski
       with a custom LLVM fuzzer.

   41. Remove the use of /dev/null in testdata/testinput2, because it doesn't
       work under Windows. (Why has it taken so long for anyone to notice?)

   42. In a character class such as [\W\p{Any}] where both a negative-type escape
       ("not a word character") and a property escape were present, \ 
the property
       escape was being ignored.

   43. Fix crash caused by very long (*MARK) or (*THEN) names.

   44. A sequence such as [[:punct:]b] that is, a POSIX character class followed
       by a single ASCII character in a class item, was incorrectly compiled in
       UCP mode. The POSIX class got lost, but only if the single character
       followed it.

   45. [:punct:] in UCP mode was matching some characters in the range 128-255
       that should not have been matched.

   46. If [:^ascii:] or [:^xdigit:] or [:^cntrl:] are present in a non-negated
       class, all characters with code points greater than 255 are in the class.
       When a Unicode property was also in the class (if PCRE_UCP is set, escapes
       such as \w are turned into Unicode properties), wide characters were not
       correctly handled, and could fail to match.