Problems summary

watch command displays duplicate

(sdb) watch
#0 's': string it = "aaa"
#0 's': string it = "aaa"

like this untitled

Expected

watch command display properly.

(sdb) watch
#0 's': string it = "aaa"

Environment Information

sdb vrsion

$ sdb --version
Mono soft debugger (sdb) 1.5.6548.37600

OSX version

$ sw_vers 
ProductName:    Mac OS X
ProductVersion: 10.13.2
BuildVersion:   17C88

mono version

$ mono --version
Mono JIT compiler version 5.4.1.6 (tarball Mon Dec 11 14:59:42 GMT 2017)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
    TLS:           normal
    SIGSEGV:       altstack
    Notification:  kqueue
    Architecture:  amd64
    Disabled:      none
    Misc:          softdebug 
    LLVM:          supported, not enabled.
    GC:            sgen (concurrent by default)