No action on this for a while, so thought I would check whether the last 
test.pto fails on my system, Fedora 20 x86_64.
Using Hugin-2014.1.0 and enblend-4.2 with output set to EXR, it fails, but 
stitches without error if output set to TIFF.
Using enlend-4.1.2 with output set to EXR it stitches without error.

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https://bugs.launchpad.net/bugs/921215

Title:
  Segmentation Fault on HDR Blend

Status in Hugin - Panorama Tools GUI:
  New

Bug description:
  After, doing what appears to be everything correctly. I run the process, and 
the log ends up as this.
  It's 6 or 7 exposure different images, that I'm trying to blend into an HDR. 
Mainly testing purposes right now.
  I keep getting a Seg Fault at the last make exr step.

  -JAG


  ===========================================================================
  ***************  Panorama makefile generated by Hugin       ***************
  ===========================================================================
  System information
  ===========================================================================
  Operating system: GNU/Linux
  Release: 3.0.0-15-generic
  Kernel version: #26-Ubuntu SMP Fri Jan 20 17:23:00 UTC 2012
  Machine: x86_64
  Disc usage
  Filesystem            Size  Used Avail Use% Mounted on
  /dev/sda1              55G   34G   19G  65% /
  udev                  1.9G  8.0K  1.9G   1% /dev
  tmpfs                 780M  1.1M  778M   1% /run
  none                  5.0M     0  5.0M   0% /run/lock
  none                  2.0G  1.7M  2.0G   1% /run/shm
  /dev/sdb1             466G  346G  121G  75% /media/A500
  Memory usage
               total       used       free     shared    buffers     cached
  Mem:          3895       3772        122          0         10        218
  -/+ buffers/cache:       3544        351
  Swap:         4027        677       3350
  ===========================================================================
  Output options
  ===========================================================================
  Hugin Version: 2011.4.0.cf9be9344356
  Project file: /tmp/huginpto_F5LgOK
  Output prefix: IMG_20120124_124742-IMG_20120124_124809
  Projection: Rectilinear (0)
  Field of view: 52 x 42
  Canvas dimensions: 2620 x 2062
  Crop area: (62,113) - (2545,1932)
  Output exposure value: 14.91
  Selected outputs
  HDR merging
  * Merged and blended panorama
  ===========================================================================
  Input images
  ===========================================================================
  Number of images in project file: 7
  Number of active images: 7
  Image 0: 
/media/A500/Dropbox/Dropbox/Public/Photos/hdr/2/IMG_20120124_124742.jpg
  Image 0: Size 2592x1944, Exposure: 10.84
  Image 1: 
/media/A500/Dropbox/Dropbox/Public/Photos/hdr/2/IMG_20120124_124746.jpg
  Image 1: Size 2592x1944, Exposure: 12.01
  Image 2: 
/media/A500/Dropbox/Dropbox/Public/Photos/hdr/2/IMG_20120124_124751.jpg
  Image 2: Size 2592x1944, Exposure: 12.97
  Image 3: 
/media/A500/Dropbox/Dropbox/Public/Photos/hdr/2/IMG_20120124_124755.jpg
  Image 3: Size 2592x1944, Exposure: 14.12
  Image 4: 
/media/A500/Dropbox/Dropbox/Public/Photos/hdr/2/IMG_20120124_124759.jpg
  Image 4: Size 2592x1944, Exposure: 15.87
  Image 5: 
/media/A500/Dropbox/Dropbox/Public/Photos/hdr/2/IMG_20120124_124803.jpg
  Image 5: Size 2592x1944, Exposure: 18.77
  Image 6: 
/media/A500/Dropbox/Dropbox/Public/Photos/hdr/2/IMG_20120124_124809.jpg
  Image 6: Size 2592x1944, Exposure: 19.77
  ===========================================================================
  Testing programs
  ===========================================================================
  Checking nona...[OK]
  Checking enblend...[OK]
  Checking enfuse...[OK]
  Checking hugin_hdrmerge...[OK]
  Checking exiftool...[OK]
  ===========================================================================
  Stitching panorama
  ===========================================================================
  nona  -r hdr -m EXR_m -o IMG_20120124_124742-IMG_20120124_124809_hdr_ -i 0 
/tmp/huginpto_F5LgOK
  nona  -r hdr -m EXR_m -o IMG_20120124_124742-IMG_20120124_124809_hdr_ -i 1 
/tmp/huginpto_F5LgOK
  nona  -r hdr -m EXR_m -o IMG_20120124_124742-IMG_20120124_124809_hdr_ -i 2 
/tmp/huginpto_F5LgOK
  nona  -r hdr -m EXR_m -o IMG_20120124_124742-IMG_20120124_124809_hdr_ -i 3 
/tmp/huginpto_F5LgOK
  nona  -r hdr -m EXR_m -o IMG_20120124_124742-IMG_20120124_124809_hdr_ -i 4 
/tmp/huginpto_F5LgOK
  nona  -r hdr -m EXR_m -o IMG_20120124_124742-IMG_20120124_124809_hdr_ -i 5 
/tmp/huginpto_F5LgOK
  nona  -r hdr -m EXR_m -o IMG_20120124_124742-IMG_20120124_124809_hdr_ -i 6 
/tmp/huginpto_F5LgOK
  hugin_hdrmerge -m avg -c -o 
IMG_20120124_124742-IMG_20120124_124809_stack_hdr_0000.exr -- 
IMG_20120124_124742-IMG_20120124_124809_hdr_0000.exr 
IMG_20120124_124742-IMG_20120124_124809_hdr_0001.exr 
IMG_20120124_124742-IMG_20120124_124809_hdr_0002.exr 
IMG_20120124_124742-IMG_20120124_124809_hdr_0003.exr 
IMG_20120124_124742-IMG_20120124_124809_hdr_0004.exr 
IMG_20120124_124742-IMG_20120124_124809_hdr_0005.exr 
IMG_20120124_124742-IMG_20120124_124809_hdr_0006.exr
  make: *** [IMG_20120124_124742-IMG_20120124_124809_stack_hdr_0000.exr] 
Segmentation fault
  make: *** Deleting file 
`IMG_20120124_124742-IMG_20120124_124809_stack_hdr_0000.exr'

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