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$ MALLOC_CHECK_=3 ~/r/trunk/bin/ruby fiber_fork.rb
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*** glibc detected *** /home/ew/r/trunk/bin/ruby: free(): invalid pointer: 0x00007f3299f918d0 ***
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======= Backtrace: =========
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/lib/x86_64-linux-gnu/libc.so.6(+0x72606)[0x7f3297fa0606]
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/home/ew/r/trunk/bin/ruby(st_free_table+0x81)[0x7f3299080841]
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/home/ew/r/trunk/bin/ruby(+0x11bb24)[0x7f32990d0b24]
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/home/ew/r/trunk/bin/ruby(ruby_vm_destruct+0x3e)[0x7f32990e4bbe]
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/home/ew/r/trunk/bin/ruby(ruby_cleanup+0x249)[0x7f3298fd9189]
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/home/ew/r/trunk/bin/ruby(ruby_stop+0x9)[0x7f3298fd9339]
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/home/ew/r/trunk/bin/ruby(+0x86e4b)[0x7f329903be4b]
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/home/ew/r/trunk/bin/ruby(+0x12dcba)[0x7f32990e2cba]
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/home/ew/r/trunk/bin/ruby(+0x120ea9)[0x7f32990d5ea9]
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/home/ew/r/trunk/bin/ruby(+0x127c8a)[0x7f32990dcc8a]
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/home/ew/r/trunk/bin/ruby(+0x128a93)[0x7f32990dda93]
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/home/ew/r/trunk/bin/ruby(+0x129071)[0x7f32990de071]
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/home/ew/r/trunk/bin/ruby(+0x13eb2f)[0x7f32990f3b2f]
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/lib/x86_64-linux-gnu/libc.so.6(+0x41d60)[0x7f3297f6fd60]
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======= Memory map: ========
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7f329757c000-7f3297591000 r-xp 00000000 08:03 7331943 /lib/x86_64-linux-gnu/libgcc_s.so.1
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7f3297591000-7f3297791000 ---p 00015000 08:03 7331943 /lib/x86_64-linux-gnu/libgcc_s.so.1
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7f3297791000-7f3297792000 rw-p 00015000 08:03 7331943 /lib/x86_64-linux-gnu/libgcc_s.so.1
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7f3297792000-7f3297794000 r-xp 00000000 08:03 1510278 /home/ew/r/trunk/lib/ruby/1.9.1/x86_64-linux/enc/trans/transdb.so
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7f3297794000-7f3297994000 ---p 00002000 08:03 1510278 /home/ew/r/trunk/lib/ruby/1.9.1/x86_64-linux/enc/trans/transdb.so
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7f3297994000-7f3297995000 rw-p 00002000 08:03 1510278 /home/ew/r/trunk/lib/ruby/1.9.1/x86_64-linux/enc/trans/transdb.so
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7f3297995000-7f3297997000 r-xp 00000000 08:03 1452950 /home/ew/r/trunk/lib/ruby/1.9.1/x86_64-linux/enc/encdb.so
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7f3297997000-7f3297b96000 ---p 00002000 08:03 1452950 /home/ew/r/trunk/lib/ruby/1.9.1/x86_64-linux/enc/encdb.so
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7f3297b96000-7f3297b97000 rw-p 00001000 08:03 1452950 /home/ew/r/trunk/lib/ruby/1.9.1/x86_64-linux/enc/encdb.so
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7f3297c98000-7f3297f2e000 r--p 00000000 08:03 1720957 /usr/lib/locale/locale-archive
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7f3297f2e000-7f32980a8000 r-xp 00000000 08:03 2294258 /lib/x86_64-linux-gnu/libc-2.13.so
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7f32980a8000-7f32982a8000 ---p 0017a000 08:03 2294258 /lib/x86_64-linux-gnu/libc-2.13.so
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7f32982a8000-7f32982ac000 r--p 0017a000 08:03 2294258 /lib/x86_64-linux-gnu/libc-2.13.so
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7f32982ac000-7f32982ad000 rw-p 0017e000 08:03 2294258 /lib/x86_64-linux-gnu/libc-2.13.so
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7f32982ad000-7f32982b2000 rw-p 00000000 00:00 0
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7f32982b2000-7f3298333000 r-xp 00000000 08:03 2294265 /lib/x86_64-linux-gnu/libm-2.13.so
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7f3298333000-7f3298532000 ---p 00081000 08:03 2294265 /lib/x86_64-linux-gnu/libm-2.13.so
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7f3298532000-7f3298533000 r--p 00080000 08:03 2294265 /lib/x86_64-linux-gnu/libm-2.13.so
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7f3298533000-7f3298534000 rw-p 00081000 08:03 2294265 /lib/x86_64-linux-gnu/libm-2.13.so
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7f3298534000-7f329853c000 r-xp 00000000 08:03 2294261 /lib/x86_64-linux-gnu/libcrypt-2.13.so
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7f329853c000-7f329873b000 ---p 00008000 08:03 2294261 /lib/x86_64-linux-gnu/libcrypt-2.13.so
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7f329873b000-7f329873c000 r--p 00007000 08:03 2294261 /lib/x86_64-linux-gnu/libcrypt-2.13.so
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7f329873c000-7f329873d000 rw-p 00008000 08:03 2294261 /lib/x86_64-linux-gnu/libcrypt-2.13.so
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7f329873d000-7f329876b000 rw-p 00000000 00:00 0
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7f329876b000-7f329876d000 r-xp 00000000 08:03 7332096 /lib/x86_64-linux-gnu/libdl-2.13.so
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7f329876d000-7f329896d000 ---p 00002000 08:03 7332096 /lib/x86_64-linux-gnu/libdl-2.13.so
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7f329896d000-7f329896e000 r--p 00002000 08:03 7332096 /lib/x86_64-linux-gnu/libdl-2.13.so
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7f329896e000-7f329896f000 rw-p 00003000 08:03 7332096 /lib/x86_64-linux-gnu/libdl-2.13.so
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7f329896f000-7f3298976000 r-xp 00000000 08:03 7332102 /lib/x86_64-linux-gnu/librt-2.13.so
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7f3298976000-7f3298b75000 ---p 00007000 08:03 7332102 /lib/x86_64-linux-gnu/librt-2.13.so
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7f3298b75000-7f3298b76000 r--p 00006000 08:03 7332102 /lib/x86_64-linux-gnu/librt-2.13.so
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7f3298b76000-7f3298b77000 rw-p 00007000 08:03 7332102 /lib/x86_64-linux-gnu/librt-2.13.so
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7f3298b77000-7f3298b8e000 r-xp 00000000 08:03 7332100 /lib/x86_64-linux-gnu/libpthread-2.13.so
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7f3298b8e000-7f3298d8d000 ---p 00017000 08:03 7332100 /lib/x86_64-linux-gnu/libpthread-2.13.so
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7f3298d8d000-7f3298d8e000 r--p 00016000 08:03 7332100 /lib/x86_64-linux-gnu/libpthread-2.13.so
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7f3298d8e000-7f3298d8f000 rw-p 00017000 08:03 7332100 /lib/x86_64-linux-gnu/libpthread-2.13.so
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7f3298d8f000-7f3298d93000 rw-p 00000000 00:00 0
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7f3298d93000-7f3298db2000 r-xp 00000000 08:03 7332104 /lib/x86_64-linux-gnu/ld-2.13.so
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7f3298f93000-7f3298f98000 rw-p 00000000 00:00 0
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7f3298f9c000-7f3298f9d000 ---p 00000000 00:00 0
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7f3298f9d000-7f3298fac000 rw-p 00000000 00:00 0
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7f3298fac000-7f3298fad000 ---p 00000000 00:00 0
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7f3298fad000-7f3298fb2000 rw-p 00000000 00:00 0
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7f3298fb2000-7f3298fb3000 r--p 0001f000 08:03 7332104 /lib/x86_64-linux-gnu/ld-2.13.so
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7f3298fb3000-7f3298fb4000 rw-p 00020000 08:03 7332104 /lib/x86_64-linux-gnu/ld-2.13.so
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7f3298fb4000-7f3298fb5000 rw-p 00000000 00:00 0
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7f3298fb5000-7f32991db000 r-xp 00000000 08:03 1351782 /home/ew/r/trunk/bin/ruby
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7f32993db000-7f32993e1000 rw-p 00226000 08:03 1351782 /home/ew/r/trunk/bin/ruby
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7f32993e1000-7f32993fd000 rw-p 00000000 00:00 0
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7f3299c0d000-7f329a023000 rw-p 00000000 00:00 0 [heap]
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7fff15c17000-7fff15c38000 rw-p 00000000 00:00 0 [stack]
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7fff15dfa000-7fff15dfb000 r-xp 00000000 00:00 0 [vdso]
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ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
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[2522, #<Process::Status: pid 2522 SIGIOT (signal 6) (core dumped)>]
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