#577: EXC_BAD_ACCESS in IO.read
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Reporter: spamtr...@… | Owner: lsansone...@…
Type: defect | Status: new
Priority: minor | Milestone:
Component: MacRuby | Keywords:
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Comment(by spamtr...@…):
I've been looking a little bit at this, but since i'm unable to build
trunk, all i can do is pen & paper, and guess :)
in io.c:1108 (io_read), a distinction is made between reading x bytes, or
reading the whole file.
If we're reading the whole file
{{{
if (NIL_P(len)) {
return rb_io_read_all(io_struct, outbuf);
}
}}}
Or we're reading part of the file io.c:1145 (io_read)
{{{
const long data_read = rb_io_read_internal(io_struct, buf, size);
if (data_read == 0) {
return Qnil;
}
CFDataSetLength(data, data_read);
}}}
So far, so good.
The very last thing '''rb_io_read_internal''' io.c:983
(rb_io_read_internal) does, is to call
{{{
rb_io_read_update(io_struct, n);
}}}
Which positions the file pointer at the position we just read to.
This part isn't done by '''rb_io_read_all'''
Could this be why the eof? call fails after having called IO.read(nil) ?
Just my $0.02 after a good nights sleep :)
/Jimmy
--
Ticket URL: <http://www.macruby.org/trac/ticket/577#comment:1>
MacRuby <http://macruby.org/>
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