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Re: [Tinycc-devel] const_wanted


From: grischka
Subject: Re: [Tinycc-devel] const_wanted
Date: Sun, 31 Jul 2011 16:27:57 +0200
User-agent: Thunderbird 2.0.0.24 (Windows/20100228)

Thomas Preud'homme wrote:
Can you show an example where this happens, that is that
    const_wanted is false
and
    cur_text_section is NULL
at the same time in cond_expr()?

Sure. It's a side effect of the VLA array patches. On Hurd, there is a header with something like:

#define FOO_COUNT (cond ? 2 : 42)

type foo_array[FOO_SIZE];

This lead post_type to call gexpr() which will eventually call cond_expr() without const_wanted. This in turn will try to generate some code but will segfault due to cur_text_section being NULL (this is how I spotted it, it caused a segfault in the testsuite on Hurd)

I still cannot reproduce this.  Can you show a self contained
example to exhibit the bug?

--- grischka


I can give you the exact content of the header on Hurd if you need.

Best regards,

Thomas Preud'homme



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