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* Re: c++/7430: if method signature lies "I return SomeClass by value" but actually there is no 'return' then construct-destruct asymmetry results!
@ 2002-09-30 10:40 nathan
0 siblings, 0 replies; 2+ messages in thread
From: nathan @ 2002-09-30 10:40 UTC (permalink / raw)
To: dh, gcc-bugs, gcc-prs, nobody
Synopsis: if method signature lies "I return SomeClass by value" but actually there is no 'return' then construct-destruct asymmetry results!
State-Changed-From-To: open->closed
State-Changed-By: nathan
State-Changed-When: Mon Sep 30 10:40:33 2002
State-Changed-Why:
fixed in CVS
7430.ii: In member function `X C::MightReturnCheese()':
7430.ii:15: warning: no return statement in function returning non-void
7430.ii:15: warning: control reaches end of non-void function
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7430
^ permalink raw reply [flat|nested] 2+ messages in thread
* c++/7430: if method signature lies "I return SomeClass by value" but actually there is no 'return' then construct-destruct asymmetry results!
@ 2002-07-29 4:06 dh
0 siblings, 0 replies; 2+ messages in thread
From: dh @ 2002-07-29 4:06 UTC (permalink / raw)
To: gcc-gnats
>Number: 7430
>Category: c++
>Synopsis: if method signature lies "I return SomeClass by value" but actually there is no 'return' then construct-destruct asymmetry results!
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Mon Jul 29 04:06:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: dh@digitalbrain.com
>Release: unknown-1.0
>Organization:
>Environment:
// BUG IN THIS VERSION OF GCC:
// Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.4/specs
// gcc version 2.95.4 20011002 (Debian prerelease)
// RUNNING UNDER:
// Linux fee 2.4.18 #1 SMP Tue May 21 10:16:05 BST 2002 i686 unknown
>Description:
see How-To-Repeat
>How-To-Repeat:
try this prog:
// BUG IN THIS VERSION OF GCC:
// Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.4/specs
// gcc version 2.95.4 20011002 (Debian prerelease)
// RUNNING UNDER:
// Linux fee 2.4.18 #1 SMP Tue May 21 10:16:05 BST 2002 i686 unknown
struct X {
char* m_;
X() : m_(new char[5]) {}
~X() { delete[] m_; }
};
struct C {
X MightReturnCheese() {
//
// INSTRUCTIONS:
// comment-out the following line and get
// no compiler error/warning - just a program that
// returns uninitted-RAM as an "instance" of X. Scary.
return X();
}
void CallIt() {
MightReturnCheese();
}
};
int main() {
C c;
c.CallIt();
return 0;
}
>Fix:
none known
(though you can pick up the resulting dangerous code
that's generated using something like valgrind)
>Release-Note:
>Audit-Trail:
>Unformatted:
^ permalink raw reply [flat|nested] 2+ messages in thread
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2002-09-30 10:40 c++/7430: if method signature lies "I return SomeClass by value" but actually there is no 'return' then construct-destruct asymmetry results! nathan
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2002-07-29 4:06 dh
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