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From: bangerth@dealii.org
To: cjc@cs.brown.edu, gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org,
	nobody@gcc.gnu.org
Subject: Re: c++/10048: Compiler doesn't catch failure to return a value - causes crashing code
Date: Wed, 12 Mar 2003 21:28:00 -0000	[thread overview]
Message-ID: <20030312212841.25047.qmail@sources.redhat.com> (raw)

Synopsis: Compiler doesn't catch failure to return a value - causes crashing code

State-Changed-From-To: open->closed
State-Changed-By: bangerth
State-Changed-When: Wed Mar 12 21:28:41 2003
State-Changed-Why:
    So what is the question? You are falling off the edge of
    this function without a proper return statement. The standard 
    says to this (6.6.3.2):
      Flowing  off  the  end  of  a
      function  is  equivalent  to  a  return with no value; this results in
      undefined behavior in a value-returning function
    
    Undefined behavior is what you get here (a crash). If
    you want the compiler to catch this, turn on warnings
    which traps here.
    
    I think there's not much more gcc can do for you here...
    
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10048


             reply	other threads:[~2003-03-12 21:28 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-03-12 21:28 bangerth [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-03-12 21:36 Christian Convey
2003-03-12 20:36 cjc

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