[Octave-bug-tracker] [bug #55974] Octave hangs on plotting text object with invalid UTF-8 byte sequence

[Mike Miller]

Update of bug #55974 (project octave):

                  Status:                    None => Confirmed              
                 Summary: Octave stuck on Linux when figure contains a string
with non ASCII characters encoded in ISO 8859-1 => Octave hangs on plotting
text object with invalid UTF-8 byte sequence

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Follow-up Comment #3:

Re-summarizing this bug, and posting your example as an inline snippet.

This works correctly in a UTF-8 locale


s = "Fréquence";
text (0.2, 0.5, s)


The following causes Octave to hang and needs to be killed with SIGKILL


[~, s] = system ("echo Fréquence | iconv -f utf8 -t latin1");
s = strtrim (s);
text (0.2, 0.5, s)


The hang occurs in FreeType, here is the top of the call stack in gdb when
stuck


#0  0x00007f5fdd3e151e in ?? () from /lib/x86_64-linux-gnu/libfreetype.so.6
#1  0x00007f5fdd3e5006 in ?? () from /lib/x86_64-linux-gnu/libfreetype.so.6
#2  0x00007f5fdd3e5c58 in ?? () from /lib/x86_64-linux-gnu/libfreetype.so.6
#3  0x00007f5fdd3e83d6 in ?? () from /lib/x86_64-linux-gnu/libfreetype.so.6
#4  0x00007f5fdd3eab73 in ?? () from /lib/x86_64-linux-gnu/libfreetype.so.6
#5  0x00007f5fdd39a9de in ?? () from /lib/x86_64-linux-gnu/libfreetype.so.6
#6  0x00007f5fdd374641 in FT_Load_Glyph () from
/lib/x86_64-linux-gnu/libfreetype.so.6
#7  0x00007f5fe0479403 in octave::ft_text_renderer::process_character
(address@hidden, code=114, 
    address@hidden) at
../libinterp/corefcn/ft-text-renderer.cc:726
#8  0x00007f5fe047a2e6 in octave::ft_text_renderer::visit
(this=0x55cd357ca940, e=...)
    at ../libinterp/corefcn/ft-text-renderer.cc:930
#9  0x00007f5fe0478d65 in octave::text_processor::visit (e=...,
this=0x55cd357ca940)
    at ../libinterp/corefcn/text-engine.h:330
#10 octave::ft_text_renderer::visit (this=0x55cd357ca940, e=...) at
../libinterp/corefcn/ft-text-renderer.cc:970
#11 0x00007f5fe047726a in octave::ft_text_renderer::render
(this=0x55cd357ca940, elt=0x55cd35835600, box=..., 
    rotation=0) at ../libinterp/corefcn/ft-text-renderer.cc:1165
#12 0x00007f5fe04784a0 in octave::ft_text_renderer::text_to_pixels
(this=0x55cd357ca940, txt="Fr\351quence\n", 
    pxls=..., box=..., _halign=<optimized out>, valign=1, rotation=<optimized
out>, interpreter=..., 
    handle_rotation=true) at ../libinterp/corefcn/ft-text-renderer.cc:1302
#13 0x00007f5fe078baa2 in octave::text_renderer::text_to_pixels
(address@hidden, 
    txt="Fr\351quence\n", pxls=..., bbox=..., address@hidden,
address@hidden, 


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