From: Jonathan Wakely <jwakely.gcc@gmail.com>
To: "Henrik Mannerström" <henrik.mannerstrom@gmail.com>
Cc: gcc-help <gcc-help@gcc.gnu.org>
Subject: Re: std::string clobbers memory when compiling without optimizations
Date: Fri, 03 Oct 2014 12:36:00 -0000 [thread overview]
Message-ID: <CAH6eHdQWTr85CpbpGFeFahg+h7cT8QZmcGjirJ3XoFhtWYHO=Q@mail.gmail.com> (raw)
In-Reply-To: <542E7AE1.2090807@gmail.com>
On 3 October 2014 11:30, Henrik Mannerström wrote:
> On 10/03/2014 01:20 PM, Jonathan Wakely wrote:
>> My guess is that Sigma holds a dangling reference to some temporary
>> object that has gone out of scope, and the function call t2s
>> overwrites that stack memory, then when you return to main you go
>> through the dangling reference.
>>
>> Are you sure you're using the Eigen types correctly?
> You are right, the auto type does not force the evaluation of Sigma,
> which leaves the dangling reference. Yet again I get burned by trying to
> combine Eigen and C++11. How would you classify this, could you call it
> a bug in Eigen, or just incompatibility with C++11?
As Marc says, expression templates are often incompatible with 'auto',
that doesn't mean Eigen is incompatible with C++11 in general.
next prev parent reply other threads:[~2014-10-03 12:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-03 8:19 Henrik Mannerström
2014-10-03 9:58 ` Jonathan Wakely
2014-10-03 10:09 ` Henrik Mannerström
2014-10-03 10:20 ` Jonathan Wakely
2014-10-03 10:31 ` Henrik Mannerström
2014-10-03 12:36 ` Jonathan Wakely [this message]
2014-10-03 10:31 ` Marc Glisse
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