[Octave-bug-tracker] [bug #37928] GUI crashes with french locale

[Rik]

Follow-up Comment #21, bug #37928 (project octave):

I re-ran your correct test 'a = .5', but it still works just fine on my
machine.  

This may be impossible to debug and could be recorded as just an oddity with
your particular machine.

>From past experiments, we know that it is caused by a mismatch between the
locale that the GUI expects (en_US.utf-8) and whatever the current locale is. 
Changing the locale (export LC_ALL=en_us.UTF-8) before running Octave works. 
Unfortunately, the reverse situation does not provoke the bug.  On my system
if I use 'export LC_ALL=fr_FR.UTF-8' and run Octave the GUI still works.

We also know that the problem does not appear to be with output, only input. 
We also know that the CLI interface, which doesn't use any setlocale function
calls, works.  Without any setlocale calls the program operates in the 'C'
locale which has a radix of '.'.

I thought of a few more tests.

Test #1:

sprintf ("%4f\n", e)


This will verify that output is using the correct radix for the 'C' locale.

Test #2:


./run-octave
1,5
1.5
history 5


This will at least check whether the parser is seeing the full input that the
screen is displaying.

Maybe there is some input scheme, like SCIM, that is interfering with things?

Test #3:


./run-octave
+


This should provoke a syntax error.  

If none of this brings any insight the last step would be to compile with '-g
-O0' and run octave under gdb and get a backtrace when it crashes.


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