[Bug 1615253] [NEW] pdf viewer reports incorrect number of matches when we use find in the viewer

[Saurabh Misra]

Public bug reported:

I opened this pdf page https://www.asee.org/papers-and-publications/publications/college-profiles/2015-graduate-engineering-degrees.pdf
 
and for example try to find by typing "computer engineering", it shows 2 or 4 matches where there are around 25 or more instances of this phrase. 

Definitely a bug in the pdf viewer. Tried to reproduce myself.

Even if you don't want to scan the whole pdf for performance constraints
you shouldn't display wrong match count. Count all if it won't crash the
browser.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: firefox 48.0+build2-0ubuntu0.16.04.1
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  saurabh    3489 F.... pulseaudio
 /dev/snd/controlC1:  saurabh    3489 F.... pulseaudio
BuildID: 20160728203720
Channel: Unavailable
CurrentDesktop: Unity
Date: Sat Aug 20 22:57:01 2016
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2016-08-03 (16 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
IpRoute:
 default via 192.168.0.1 dev wlp2s0  proto static  metric 600 
 192.168.0.0/24 dev wlp2s0  proto kernel  scope link  src 192.168.0.3  metric 600
Locales: extensions.sqlite corrupt or missing
Plugins: Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
PrefSources: prefs.js
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=48.0/20160728203720 (In use)
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/31/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: 9BCN26WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Lancer 5A5
dmi.board.vendor: LENOVO
dmi.board.version: 31900059WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo Z50-70
dmi.modalias: dmi:bvnLENOVO:bvr9BCN26WW:bd07/31/2014:svnLENOVO:pn20354:pvrLenovoZ50-70:rvnLENOVO:rnLancer5A5:rvr31900059WIN:cvnLENOVO:ct10:cvrLenovoZ50-70:
dmi.product.name: 20354
dmi.product.version: Lenovo Z50-70
dmi.sys.vendor: LENOVO

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1615253

Title:
  pdf viewer reports incorrect number of matches when we use find in the
  viewer

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