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the tables were not cleaned !

nb : to track this, i've replaced StringMap.find and Hashtbl.find by
   mfind and hfind defined in Util and used everywhere.

Actually, I've replaced a particularly horrible chunk
of code that was buggy (I knew it, but i am lazy...).

More precisly, use Verbose.exe instead of Verbose.put when args of
printf are non trivial to compute.

Make sure everything is reproductible during time traveling, or when
starting back from any stored event, by reseting the random seed
using the event number each time the event number changes.

Add time travelling support (à la appel/Tolmach) in Ldbg_utils.

Re-organise the Event.t structure

Add Call events.

Fix the step number for "run" lutin machines.

Add Events when an elected contraint fails (backtrack).

Attach the event number to the Deadlock exception in non debug mode
to ease the debugging when an unexpected deadlock is raised at
top-level.

Trace also the SUT if it is a Lutin program.

Attach the event number to the Deadlock exception in non debug mode
to ease the debugging when an unexpected deadlock is raised at
top-level.

Add hooks support for Ldbg_utils.next.

Add a simple Ldbg_utils.profiler.

Add a reset_rp command.

Also, do not call clear_step all the time but only before the step
(which change some non-reg test).

Add a -check option to Lutin and performs all the checks but do not
run.

Fix a embarassing bug when handling ITE (the bug was triggered in case of nested ITE with branches that hold the same Ne.t).

A pass to remove performance penalty in lurettetop (now the panalty in less than 1%).
The idea was to compute source info lasily.

Add nonreg tests for ldbg + crazy-rabbit, as well as missing files (oops).

Add online help msgs for the Ldbg_utils modules.

Better source code information. In particular, I've attached a
'Syntaxe.val_exp option' to each lxm:Lexeme.t in the
CoIdent.scope_stack type. The rationnale is to bez able to display
the whole expression associated to a lxm in ldbg (versus only the
lxm).

Add (preliminary) source code information !!

Among other things:

- split ldbg into ldbg and ldbg_utils.
- refine the event content.
- add support for online help.

Now I can trace lutin step called from run statements!

I've duplicated a lot of code in LutExe ; i'll fix that later...

I can now trace Lutin step.

The idea is to make lurettetop a caml toplevel that launches in
coroutine the whole test execution.

In order to implement that, I broke the inner loop in RunDirect.f
replace by a continuation that will make the coroutine easier.

Next step is to do the same in the lutin step.

nb : the gnuplot window needs to be refresed manually ('a' keystroke).
I should find a way to refresh it automatically.

It is a bit tricky because all the tools are compiled with the mingw
compiler, which means that all the system calls are done via the DOS
convention. Therefore, we need  to use :

- the rigth path conventions
- .bat instead of .sh scripts

Add a  --ocamlc-version option to lurettetop and lutin.

The idea is to put all the .exp files into a `lurettetop/lutin --ocamlc-version`
dir so that I have an .exp file for each ocaml version.

If the `lurettetop --ocaml-version`/*.exp does not exist, I generate it.

Also, don't non-reg test lucky dirs anymore (because they are boring).

Aldo, don't rely on the HOSTTYPE env var, but use Sys.os_type instead.

The lists of "true variables" and "true variables for the first time"
were interchanged.

Fix a bug with --delay-env-out option: the rif file was wrong (luciole outputs were appearinf twice).

returning wrongs values.  The problem was due to the use of caml
integer, that were not always big enough (on 32 bits arch). Bertrand
fixed by usings the Nums ocaml lib.