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middle-end/8405: GCC 3.2: 'throw "exception";' not caught by catch
- From: dobrynin at cs dot uwm dot edu
- To: gcc-gnats at gcc dot gnu dot org
- Date: 30 Oct 2002 17:13:10 -0000
- Subject: middle-end/8405: GCC 3.2: 'throw "exception";' not caught by catch
- Reply-to: dobrynin at cs dot uwm dot edu
>Number: 8405
>Category: middle-end
>Synopsis: GCC 3.2: 'throw "exception";' not caught by catch
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Wed Oct 30 09:16:02 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Nickolai Dobrynin
>Release: GCC 3.2
>Organization:
>Environment:
Sun OS, Windows 2000 with Pentium 3, Cygwin under W2000/P3
>Description:
Calling the following function
void f() throw(std::string)
{
throw "exception";
}
aborts the program. It would seem that the char array "exception" must be coerced to a string-object, but this is clearly not the case here.
By the way, GCC 2.95 has the same behavior, and I didn't check the earlier versions.
I have no certainty as to whether this presents a bug or just a feature, but in either case it is quite frustrating to deal with.
>How-To-Repeat:
#include <string>
#include <iostream>
void f() throw(std::string)
{
throw "exception";
}
int main()
{
try {
f();
}
catch(...) {
std::cout << "Exception caught." << std::endl;
// The string exception does not get caught,
// which aborts the program.
}
return 0;
}
>Fix:
An obvious work-around it to use 'throw(const char *)' instead of 'throw(std::string)' as the exception specification for the function 'f'. Alternatively, we could use something like
'throw std::string("exception");' to raise the exception.
>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="bug.cpp"
Content-Disposition: inline; filename="bug.cpp"
#include <string>
#include <iostream>
void f() throw(std::string)
{
throw "exception";
}
int main()
{
try {
f();
}
catch(...) {
std::cout << "Exception caught." << std::endl;
// The string exception does not get caught,
// which aborts the program.
}
return 0;
}