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[Brian Murray <brian@xxxxxxxxxx>]

A literal tab character is not allowed in a JSON string per the JSON
standard.

https://stackoverflow.com/questions/19799006/unable-to-parse-tab-in-
json-files

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https://bugs.launchpad.net/bugs/1390627

Title:
  tabs being replaced by question marks in report values

Status in Ubuntu error tracker backend (daisy):
  Confirmed
Status in “whoopsie” package in Ubuntu:
  Confirmed

Bug description:
  Kees Cook and I discovered that something, either whoopsie or daisy or
  pycassa I guess, is replacing values that contain tabs with question
  marks. This error report contains ? instead of tabs in the Registers
  field:

  https://errors.ubuntu.com/oops/e97b1abc-66bd-11e4-9406-fa163e525ba7

  Registers:

  rax 0xfffffffffffffdfc?-516
  rbx 0x2782a60?41429600
  rcx 0xffffffffffffffff?-1
  rdx 0xb51?2897
  rsi 0x3?3

  This is also true in the database.

  In [2]: cassandra.get_crash('e97b1abc-66bd-11e4-9406-fa163e525ba7')['Registers']
  Out[2]: u'rax            0xfffffffffffffdfc?-516\nrbx            0x2782a60?41429600\nrcx            0xffffffffffffffff?-1\nrdx            0xb51?2897\nrsi            0x3?3\nrdi            0x2813dc0?42024384\nrbp            0x3?0x3\nrsp            0x7fff44d39920?0x7fff44d39920\nr8             0x3?3\nr9             0x0?0\nr10            0x0?0\nr11            0x293?659\nr12            0x2813dc0?42024384\nr13            0xb51?2897\nr14            0x7f1c37f00310?139759174288144\nr15            0x3?3\nrip            0x7f1c39fb439d?0x7f1c39fb439d <poll+45>\neflags         0x293?[ CF AF SF IF ]\ncs             0x33?51\nss             0x2b?43\nds             0x0?0\nes             0x0?0\nfs             0x0?0\ngs             0x0?0'

  I've noticed this issue both from clients running 14.04 and 15.04.
  Other fields that include tabs are ProcStatus, Disassembly.

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