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Subject: variable displayed twice when using GDB/MI
To: gdb@sourceware.org
References: <alpine.DEB.2.00.1805301840590.10896@tp.orcam.me.uk> <alpine.DEB.2.20.1805311721310.2935@digraph.polyomino.org.uk> <20180601140130.GA296965@host1.jankratochvil.net> <alpine.DEB.2.20.1806011936350.25633@digraph.polyomino.org.uk> <alpine.DEB.2.00.1806042040490.6942@tp.orcam.me.uk>
From: Xavier Roirand <roirand@adacore.com>
Message-ID: <4370e1fc-ec28-0889-85fa-28706ce38630@adacore.com>
Date: Tue, 05 Jun 2018 09:49:00 -0000
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Hello,

I'm using a simple C program:

void main() {
         int i=0;
}

When debugging with MI interpreter, I want to display variable i:

(gdb)
-break-insert main
^done,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="0x000000000040049b",func="main",file="foo.c",fullname="/tmp/foo.c",line="2",thread-groups=["i1"],times="0",original-location="main"}
(gdb)
-exec-run
[...]
display i
&"display i\n"
~"1: i = 0"
~"\n"
^done
(gdb)

If I do a 'next':

(gdb)
n
&"n\n"
^running
*running,thread-id="all"
(gdb)
~"1: i = 0"
~"\n"
~"3\t}\n"
~"1: i = 0"
~"\n"
[...]
(gdb)

The variable i is displayed twice, is it expected ? Using CLI 
interpreter it's displayed only once so I'm wondering if this is 
expected or not ?

Regards.