[PATCH 0/4] fix pax extended header length calculation

The code for building pax extended headers has been miscalculating
lengths slightly shorter than powers of 10  since I wrote it in 2006.
That affects entries for paths with a length of 990, 991, 9989, 9990,
9991, 99988 etc. and link targets 4 characters shorter.  Here's a
series for fixing it.

  archive-tar: report wrong pax extended header length
  archive-tar: fix pax extended header length calculation
  archive-tar: use size_t in strbuf_append_ext_header()
  archive-tar: turn length miscalculation warning into BUG

 archive-tar.c                   | 14 ++++++++++----
 t/t5004-archive-corner-cases.sh | 19 +++++++++++++++++++
 2 files changed, 29 insertions(+), 4 deletions(-)

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2.23.0