alias description crashes

[q6r]

zeus:radare2 git:(master*) # r2 malloc://10
 -- Print the contents of the current block with the 'p' command
 [0x00000000]> $whoami=!whoami
 [0x00000000]> $whoami?
 *** Error in `r2': munmap_chunk(): invalid pointer: 0x084c02ef ***
 ======= Backtrace: =========
 /usr/lib/libc.so.6(+0x6c449)[0xb69f5449]
 /usr/lib/libc.so.6(+0x72557)[0xb69fb557]
 /usr/lib/libc.so.6(+0x72608)[0xb69fb608]
 /usr/lib/libr_core.so.0.9.8.git(+0x3f7a7)[0xb770b7a7]
 /usr/lib/libr_core.so.0.9.8.git(r_cmd_call+0xe5)[0xb772a676]
 /usr/lib/libr_core.so.0.9.8.git(+0x429ae)[0xb770e9ae]
 /usr/lib/libr_core.so.0.9.8.git(+0x41478)[0xb770d478]
 /usr/lib/libr_core.so.0.9.8.git(r_core_cmd+0x2c4)[0xb770f2ab]
 /usr/lib/libr_core.so.0.9.8.git(r_core_prompt_exec+0x29)[0xb76e4ebf]
 r2(main+0x1b37)[0x804bcad]
 /usr/lib/libc.so.6(__libc_start_main+0xde)[0xb69a0e2e]
 r2[0x8049cf1]
 ======= Memory map: ========
 08048000-0804d000 r-xp 00000000 08:01 17837906   /usr/src/radare2/binr/radare2/radare2
 0804d000-0804e000 rw-p 00005000 08:01 17837906   /usr/src/radare2/binr/radare2/radare2
 0804e000-080af000 rw-p 00000000 00:00 0
 0845f000-084e5000 rw-p 00000000 00:00 0          [heap]
 b68cc000-b68e8000 r-xp 00000000 08:01 16128421   /usr/lib/libgcc_s.so.1
 b68e8000-b68e9000 rw-p 0001b000 08:01 16128421   /usr/lib/libgcc_s.so.1
 b690b000-b690d000 rw-p 00000000 00:00 0
 b690d000-b6910000 r-xp 00000000 08:01 16125135   /usr/lib/libdl-2.19.so
 b6910000-b6911000 r--p 00002000 08:01 16125135   /usr/lib/libdl-2.19.so
 b6911000-b6912000 rw-p 00003000 08:01 16125135   /usr/lib/libdl-2.19.so
 b6912000-b692b000 r-xp 00000000 08:01 16125200   /usr/lib/libpthread-2.19.so
 b692b000-b692c000 r--p 00018000 08:01 16125200   /usr/lib/libpthread-2.19.so
 b692c000-b692d000 rw-p 00019000 08:01 16125200   /usr/lib/libpthread-2.19.so
 b692d000-b692f000 rw-p 00000000 00:00 0
 b692f000-b6979000 r-xp 00000000 08:01 16125118   /usr/lib/libm-2.19.so
 b6979000-b697a000 r--p 00049000 08:01 16125118   /usr/lib/libm-2.19.so
 b697a000-b697b000 rw-p 0004a000 08:01 16125118   /usr/lib/libm-2.19.so
 b697b000-b6983000 r-xp 00000000 08:01 17958566   /usr/src/radare2/libr/socket/libr_socket.so
 b6983000-b6984000 rw-p 00007000 08:01 17958566   /usr/src/radare2/libr/socket/libr_socket.so
 b6984000-b6985000 rw-p 00000000 00:00 0
 b6985000-b6988000 r-xp 00000000 08:01 17958949   /usr/src/radare2/libr/lang/libr_lang.so
 b6988000-b6989000 rw-p 00002000 08:01 17958949   /usr/src/radare2/libr/lang/libr_lang.so
 b6989000-b6b44000 r-xp 00000000 08:01 16125181   /usr/lib/libc-2.19.so
 b6b44000-b6b47000 r--p 001ba000 08:01 16125181   /usr/lib/libc-2.19.so
 b6b47000-b6b49000 rw-p 001bd000 08:01 16125181   /usr/lib/libc-2.19.so
 b6b49000-b6b4b000 rw-p 00000000 00:00 0
 b6b4b000-b6b4e000 r-xp 00000000 08:01 17958955   /usr/src/radare2/libr/crypto/libr_crypto.so
 b6b4e000-b6b52000 rw-p 00002000 08:01 17958955   /usr/src/radare2/libr/crypto/libr_crypto.so
 b6b52000-b6b5e000 r-xp 00000000 08:01 17959419   /usr/src/radare2/libr/egg/libr_egg.so
 b6b5e000-b6b5f000 rw-p 0000b000 08:01 17959419   /usr/src/radare2/libr/egg/libr_egg.so
 b6b5f000-b6b61000 rw-p 00000000 00:00 0
 b6b61000-b6b9f000 r-xp 00000000 08:01 17958553   /usr/src/radare2/libr/util/libr_util.so
 b6b9f000-b6ba0000 rw-p 0003d000 08:01 17958553   /usr/src/radare2/libr/util/libr_util.so
 b6ba0000-b6ba2000 rw-p 00000000 00:00 0
 b6ba2000-b6ba6000 r-xp 00000000 08:01 17958952   /usr/src/radare2/libr/flags/libr_flags.so
 b6ba6000-b6ba7000 rw-p 00003000 08:01 17958952   /usr/src/radare2/libr/flags/libr_flags.so
 b6ba7000-b6bb9000 r-xp 00000000 08:01 17837501   /usr/src/radare2/libr/magic/libr_magic.so
 b6bb9000-b6bba000 rw-p 00011000 08:01 17837501   /usr/src/radare2/libr/magic/libr_magic.so
 b6bba000-b6bc4000 r-xp 00000000 08:01 17958825   /usr/src/radare2/libr/hash/libr_hash.so
 b6bc4000-b6bc5000 rw-p 00009000 08:01 17958825   /usr/src/radare2/libr/hash/libr_hash.so
 b6bc5000-b6bdc000 r-xp 00000000 08:01 17958849   /usr/src/radare2/libr/db/libr_db.so
 b6bdc000-b6bde000 rw-p 00016000 08:01 17958849   /usr/src/radare2/libr/db/libr_db.so
 b6bde000-b6bf8000 rw-p 00000000 00:00 0
 b6bf8000-b6bfa000 r-xp 00000000 08:01 17958938   /usr/src/radare2/libr/syscall/libr_syscall.so
 b6bfa000-b6bfb000 rw-p 00002000 08:01 17958938   /usr/src/radare2/libr/syscall/libr_syscall.so
 b6bfb000-b6bfc000 rw-p 00000000 00:00 0
 b6bfc000-b6ef4000 r-xp 00000000 08:01 17837884   /usr/src/radare2/libr/asm/libr_asm.so
 b6ef4000-b7108000 rw-p 002f7000 08:01 17837884   /usr/src/radare2/libr/asm/libr_asm.so
 b7108000-b711c000 rw-p 00000000 00:00 0
 b711c000-b7147000 r-xp 00000000 08:01 17959104   /usr/src/radare2/libr/fs/libr_fs.so
 b7147000-b7148000 rw-p 0002b000 08:01 17959104   /usr/src/radare2/libr/fs/libr_fs.so
 b7148000-b714f000 rw-p 00000000 00:00 0
 b714f000-b7184000 r-xp 00000000 08:01 17959013   /usr/src/radare2/libr/io/libr_io.so
 b7184000-b718a000 rw-p 00035000 08:01 17959013   /usr/src/radare2/libr/io/libr_io.so
 b718a000-b718f000 rw-p 00000000 00:00 0
 b718f000-b7192000 r-xp 00000000 08:01 17958907   /usr/src/radare2/libr/bp/libr_bp.so
 b7192000-b7193000 rw-p 00003000 08:01 17958907   /usr/src/radare2/libr/bp/libr_bp.so
 b7193000-b7198000 r-xp 00000000 08:01 17958861   /usr/src/radare2/libr/reg/libr_reg.so
 b7198000-b7199000 rw-p 00004000 08:01 17958861   /usr/src/radare2/libr/reg/libr_reg.so
 b7199000-b719a000 rw-p 00000000 00:00 0
 b719a000-b719d000 r-xp 00000000 08:01 17958834   /usr/src/radare2/libr/diff/libr_diff.so
 b719d000-b719e000 rw-p 00002000 08:01 17958834   /usr/src/radare2/libr/diff/libr_diff.so
 b719e000-b7427000 r-xp 00000000 08:01 17837859   /usr/src/radare2/libr/anal/libr_anal.so
 b7427000-b75e0000 rw-p 00288000 08:01 17837859   /usr/src/radare2/libr/anal/libr_anal.so
 b75e0000-b75e3000 rw-p 00000000 00:00 0
 b75e3000-b75f4000 r-xp 00000000 08:01 17959256   /usr/src/radare2/libr/debug/libr_debug.so
 b75f4000-b75f5000 rw-p 00010000 08:01 17959256   /usr/src/radare2/libr/debug/libr_debug.so
 b75f5000-b7681000 r-xp 00000000 08:01 17959179   /usr/src/radare2/libr/bin/libr_bin.so
 b7681000-b7686000 rw-p 0008c000 08:01 17959179   /usr/src/radare2/libr/bin/libr_bin.so
 b7686000-b7689000 r-xp 00000000 08:01 17958852   /usr/src/radare2/libr/config/libr_config.so
 b7689000-b768a000 rw-p 00003000 08:01 17958852   /usr/src/radare2/libr/config/libr_config.so
 b768a000-b768b000 rw-p 00000000 00:00 0
 b768b000-b769a000 r-xp 00000000 08:01 17958918   /usr/src/radare2/libr/cons/libr_cons.so
 b769a000-b769b000 rw-p 0000f000 08:01 17958918   /usr/src/radare2/libr/cons/libr_cons.so
 b769b000-b769c000 rw-p 00000000 00:00 0
 b769c000-b76a0000 r-xp 00000000 08:01 17958894   /usr/src/radare2/libr/search/libr_search.so
 b76a0000-b76a1000 rw-p 00004000 08:01 17958894   /usr/src/radare2/libr/search/libr_search.so
 b76a1000-b76bb000 r-xp 00000000 08:01 17959216   /usr/src/radare2/libr/parse/libr_parse.so
 b76bb000-b76bd000 rw-p 00019000 08:01 17959216   /usr/src/radare2/libr/parse/libr_parse.so
 b76bd000-b76cc000 rw-p 00000000 00:00 0
 b76cc000-b776a000 r-xp 00000000 08:01 17959474   /usr/src/radare2/libr/core/libr_core.so
 b776a000-b776f000 rw-p 0009e000 08:01 17959474   /usr/src/radare2/libr/core/libr_core.so
 b776f000-b7770000 rw-p 00000000 00:00 0
 b7773000-b7775000 r--s 00000000 08:01 17958919   /usr/src/radare2/libr/syscall/d/linux-x86-32.sdb
 b7775000-b7777000 r-xp 00000000 08:01 17959395   /usr/src/radare2/libr/asm/p/asm_psosvm.so
 b7777000-b7778000 rw-p 00001000 08:01 17959395   /usr/src/radare2/libr/asm/p/asm_psosvm.so
 b7778000-b777a000 r-xp 00000000 08:01 17959399   /usr/src/radare2/libr/asm/p/asm_snes.so
 b777a000-b777b000 rw-p 00002000 08:01 17959399   /usr/src/radare2/libr/asm/p/asm_snes.so
 b777b000-b777c000 r-xp 00000000 08:01 17959396   /usr/src/radare2/libr/asm/p/asm_x86_nasm.so
 b777c000-b777d000 rw-p 00000000 08:01 17959396   /usr/src/radare2/libr/asm/p/asm_x86_nasm.so
 b777d000-b777e000 r-xp 00000000 08:01 17959392   /usr/src/radare2/libr/asm/p/asm_x86_as.so
 b777e000-b777f000 rw-p 00000000 08:01 17959392   /usr/src/radare2/libr/asm/p/asm_x86_as.so
 b777f000-b7782000 r-xp 00000000 08:01 17959402   /usr/src/radare2/libr/asm/p/asm_6502.so
 b7782000-b7783000 rw-p 00002000 08:01 17959402   /usr/src/radare2/libr/asm/p/asm_6502.so
 b7783000-b7785000 r--s 00000000 08:01 17958919   /usr/src/radare2/libr/syscall/d/linux-x86-32.sdb
 b778e000-b7790000 rw-p 00000000 00:00 0
 b7790000-b7792000 r--s 00000000 08:01 17958919   /usr/src/radare2/libr/syscall/d/linux-x86-32.sdb
 b7792000-b7794000 r--p 00000000 00:00 0
 b7794000-b7795000 r-xp 00000000 00:00 0          [vdso]
 b7795000-b77b6000 r-xp 00000000 08:01 16125158   /usr/lib/ld-2.19.so
 b77b6000-b77b7000 rw-p 00000000 00:00 0
 b77b7000-b77b8000 r--p 00021000 08:01 16125158   /usr/lib/ld-2.19.so
 b77b8000-b77b9000 rw-p 00022000 08:01 16125158   /usr/lib/ld-2.19.so
 bfaff000-bfb20000 rw-p 00000000 00:00 0          [stack]

BT

#0  0xb7fdbb2c in __kernel_vsyscall ()
#1  0xb71fc297 in raise () from /usr/lib/libc.so.6
#2  0xb71fd8ea in abort () from /usr/lib/libc.so.6
#3  0xb723c44e in __libc_message () from /usr/lib/libc.so.6
#4  0xb7242557 in malloc_printerr () from /usr/lib/libc.so.6
#5  0xb7242608 in munmap_chunk () from /usr/lib/libc.so.6
#6  0xb7f527a7 in cmd_alias (data=0x804d500 <r>, input=0x81102d9 "whoami?") at cmd.c:139
#7  0xb7f71676 in r_cmd_call (cmd=0x80e4230, input=0x81102d8 "$whoami?") at cmd_api.c:179
#8  0xb7f559ae in r_core_cmd_subst_i (core=0x804d500 <r>, cmd=0x81102d8 "$whoami?") at cmd.c:1237
#9  0xb7f54478 in r_core_cmd_subst (core=0x804d500 <r>, cmd=0x81102d8 "$whoami?") at cmd.c:790
#10 0xb7f562ab in r_core_cmd (core=0x804d500 <r>, cstr=0x8110350 "$whoami?", log=0x1) at cmd.c:1435
#11 0xb7f2bebf in r_core_prompt_exec (r=0x804d500 <r>) at core.c:776
#12 0x0804bcad in main (argc=0x2, argv=0xbffff204, envp=0xbffff210) at radare2.c:647
#13 0xb71e7e2e in __libc_start_main () from /usr/lib/libc.so.6
#14 0x08049cf1 in _start ()