i tried to deliver the output,

 but under valgrind there was no crash ...

i simply started yelp (there are missing files with my german locale , the crash does not happen with LANGUAGE=C)

======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x78a8f)[0x7f281da2fa8f]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x73)[0x7f281da338e3]
/usr/lib/libyelp.so.0(+0x1dc17)[0x7f2820e79c17]
/lib/x86_64-linux-gnu/libglib-2.0.so.0(+0x6a3e4)[0x7f281dfd33e4]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x6d8c)[0x7f281dd51d8c]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f281da9d04d]
======= Memory map: ========
00400000-0040c000 r-xp 00000000 08:05 800055                             /usr/bin/yelp
0060b000-0060c000 r--p 0000b000 08:05 800055                             /usr/bin/yelp
0060c000-0060d000 rw-p 0000c000 08:05 800055                             /usr/bin/yelp
00af3000-01565000 rw-p 00000000 00:00 0                                  [heap]
7f27fe000000-7f2800000000 rwxp 00000000 00:00 0 
7f2800000000-7f2800e32000 rw-p 00000000 00:00 0 
7f2800e32000-7f2804000000 ---p 00000000 00:00 0 
7f280401b000-7f2804169000 rw-p 00000000 00:00 0 
7f2804169000-7f28041af000 r--p 00000000 08:05 2232918                    /usr/share/fonts/truetype/msttcorefonts/Arial_Bold.ttf
7f28041af000-7f2804953000 rw-p 00000000 00:00 0 
7f2804953000-7f2804954000 ---p 00000000 00:00 0 
7f2804954000-7f2805154000 rw-p 00000000 00:00 0 
7f2805154000-7f28051b4000 rw-s 00000000 00:04 11010061                   /SYSV00000000 (deleted)
7f28051b4000-7f28051f6000 r-xp 00000000 08:05 790521                     /usr/lib/libibus.so.2.0.0
7f28051f6000-7f28053f6000 ---p 00042000 08:05 790521                     /usr/lib/libibus.so.2.0.0
7f28053f6000-7f28053f7000 r--p 00042000 08:05 790521                     /usr/lib/libibus.so.2.0.0
7f28053f7000-7f28053f8000 rw-p 00043000 08:05 790521                     /usr/lib/libibus.so.2.0.0
7f28053f8000-7f28053f9000 rw-p 00000000 00:00 0 
7f28053f9000-7f28053fe000 r-xp 00000000 08:05 792711                     /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
7f28053fe000-7f28055fd000 ---p 00005000 08:05 792711                     /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
7f28055fd000-7f28055fe000 r--p 00004000 08:05 792711                     /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
7f28055fe000-7f28055ff000 rw-p 00005000 08:05 792711                     /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
7f28055ff000-7f280565f000 rw-s 00000000 00:04 10977292                   /SYSV00000000 (deleted)
7f28056a0000-7f28056a1000 ---p 00000000 00:00 0 
7f28056a1000-7f2805ea1000 rw-p 00000000 00:00 0 
7f2805ea1000-7f2805ee5000 r--p 00000000 08:05 2232921                    /usr/share/fonts/truetype/msttcorefonts/Arial.ttf
7f2805ee5000-7f2805ee7000 r-xp 00000000 08:05 1055361                    /usr/lib/x86_64-linux-gnu/pango/1.6.0/modules/pango-basic-fc.so
7f2805ee7000-7f28060e6000 ---p 00002000 08:05 1055361                    /usr/lib/x86_64-linux-gnu/pango/1.6.0/modules/pango-basic-fc.so
7f28060e6000-7f28060e7000 r--p 00001000 08:05 1055361                    /usr/lib/x86_64-linux-gnu/pango/1.6.0/modules/pango-basic-fc.so
7f28060e7000-7f28060e8000 rw-p 00002000 08:05 1055361                    /usr/lib/x86_64-linux-gnu/pango/1.6.0/modules/pango-basic-fc.so
7f28060e8000-7f28060e9000 r--s 00000000 08:05 1843093                    /var/cache/fontconfig/c05880de57d1f5e948fdfacc138775d9-le64.cache-3
7f28060e9000-7f28060f2000 r--s 00000000 08:05 1843090                    /var/cache/fontconfig/945677eb7aeaf62f1d50efc3fb3ec7d8-le64.cache-3
7f28060f2000-7f28060f4000 r--s 00000000 08:05 1843091                    /var/cache/fontconfig/99e8ed0e538f840c565b6ed5dad60d56-le64.cache-3
7f28060f4000-7f28060f7000 r--s 00000000 08:05 1843101                    /var/cache/fontconfig/e383d7ea5fbe662a33d9b44caf393297-le64.cache-3
7f28060f7000-7f28060f9000 r--s 00000000 08:05 1843078                    /var/cache/fontconfig/2cd17615ca594fa2959ae173292e504c-le64.cache-3
7f28060f9000-7f28060fa000 r--s 00000000 08:05 1843102                    /var/cache/fontconfig/e7071f4a29fa870f4323321c154eba04-le64.cache-3
7f28060fa000-7f28060fe000 r--s 00000000 08:05 1843087                    /var/cache/fontconfig/6eb3985aa4124903f6ff08ba781cd364-le64.cache-3
7f28060fe000-7f28060ff000 r--s 00000000 08:05 1843082                    /var/cache/fontconfig/4c73fe0c47614734b17d736dbde7580a-le64.cache-3
7f28060ff000-7f2806100000 r--s 00000000 08:05 1843075                    /var/cache/fontconfig/0d8c3b2ac0904cb8a57a757ad11a4a08-le64.cache-3
7f2806100000-7f2806101000 r--s 00000000 08:05 1843085                    /var/cache/fontconfig/6a53c69dea097a2d716e069445527da8-le64.cache-3
7f2806101000-7f2806107000 r--s 00000000 08:05 1843092                    /var/cache/fontconfig/a755afe4a08bf5b97852ceb7400b47bc-le64.cache-3
7f2806107000-7f2806110000 r--s 00000000 08:05 1843095                    /var/cache/fontconfig/6d41288fd70b0be22e8c3a91e032eec0-le64.cache-3
7f2806110000-7f2806120000 r--s 00000000 08:05 1843076                    /var/cache/fontconfig/0f34bcd4b6ee430af32735b75db7f02b-le64.cache-3
7f2806120000-7f2806123000 r--s 00000000 08:05 1843098                    /var/cache/fontconfig/d60319d88cac85ba9e1a07bd06cfbb8c-le64.cache-3
7f2806123000-7f2806124000 r--s 00000000 08:05 1839887                    /var/cache/fontconfig/4794a0821666d79190d59a36cb4f44b5-le64.cache-3