id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
3229	queued GHCi commands are not resume context specific	phercek		"I think it is a bug that the second part ({{{:continue}}}) of the command {{{:cmd return ""rv\n:continue""}}} is executed in a different context than the first part (rv (request for the value of rv variable)). Notice that we did not stop at breakpoint 1 (line 7). Well, the stop happened but it continued immediately because of queued {{{:continue}}} command. But the command was queued in the context of breakpoint 0 and not breakpoint 1.
{{{
status:0 peter@metod [716] ~/tmp
% grep -n '^' b.hs
1:fn :: Int -> Int
2:fn x =
3:  let rv = add x 1 in
4:  rv
5:
6:add :: Int -> Int -> Int
7:add a b = a + b
status:0 peter@metod [717] ~/tmp
% ghci b.hs       
GHCi, version 6.10.1: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer ... linking ... done.
Loading package base ... linking ... done.
[1 of 1] Compiling Main             ( b.hs, interpreted )
Ok, modules loaded: Main.
*Main> :set stop :list
*Main> :break 4
Breakpoint 0 activated at b.hs:4:2-3
*Main> :break 7
Breakpoint 1 activated at b.hs:7:0-14
*Main> fn 100
Stopped at b.hs:4:2-3
_result :: Int = _
rv :: Int = _
3    let rv = add x 1 in
4    rv
5  
[b.hs:4:2-3] *Main> :cmd return ""rv\n:continue""
Stopped at b.hs:7:0-14
_result :: Int = _
6  add :: Int -> Int -> Int
7  add a b = a + b
8  
101
[b.hs:4:2-3] *Main> :continue
101
*Main> :q
Leaving GHCi.
status:0 peter@metod [718] ~/tmp
% 
}}}
The log was done with 6.10.1 but it is the same with 6.10.3.[[BR]]
I posted about this to the ghc users list about 2 months ago but nobody responded. My guess is nobody minds either way since nobody scripts breakpoints. At least it would be fine to know whether a patch fixing this has a chance to be accepted."	bug	closed	normal		GHCi	6.10.3	wontfix	debugger		Unknown/Multiple	Unknown/Multiple		Unknown