https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103993
cdfrey at foursquare dot net changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |cdfrey at foursquare dot net
--- Comment #5 from cdfrey at foursquare dot net ---
This happens for me. Here is a test case, for gcc 13.1.0, which gives the
warning with this command:
/home/gcc/rootdir/gcc-13.1.0/bin/g++ -Wall -O2 --std=c++17 -Wall -Wextra
-Werror -fmax-errors=4 -c -o gcc-test-case.o gcc-test-case.cc
gcc-test-case.cc: In function ‘int main()’:
gcc-test-case.cc:49:16: error: ‘static void Test::operator delete(void*)’
called on pointer returned from a mismatched allocation function
[-Werror=mismatched-new-delete]
49 | delete t;
| ^
In static member function ‘static void* Test::operator new(size_t)’,
inlined from ‘int main()’ at gcc-test-case.cc:48:10:
gcc-test-case.cc:17:30: note: returned from ‘void* malloc(size_t)’
17 | return malloc(size);
| ~~~~~~^~~~~~
gcc-test-case.cc: In function ‘int main()’:
gcc-test-case.cc:48:17: error: ‘static void Test::operator delete(void*)’
called on pointer returned from a mismatched allocation function
[-Werror=mismatched-new-delete]
48 | t = new Test;
| ^~~~
In static member function ‘static void* Test::operator new(size_t)’,
inlined from ‘int main()’ at gcc-test-case.cc:48:10:
gcc-test-case.cc:17:30: note: returned from ‘void* malloc(size_t)’
17 | return malloc(size);
| ~~~~~~^~~~~~
cc1plus: all warnings being treated as errors
make: *** [<builtin>: gcc-test-case.o] Error 1
The code:
#include <iostream> // cout statements needed to trigger warning
#include <new>
#include <stdlib.h>
using namespace std;
struct Test
{
double a, b, c;
Test() {
cout << "Test::Test()\n";
}
void* operator new(size_t size)
{
cout << "Test::operator new(" << size << ")\n";
return malloc(size);
}
void* operator new(size_t size, align_val_t al)
{
cout << "Test::operator new(" << size << ", align: " <<
(size_t)al << ")\n";
return aligned_alloc((size_t)al, size);
}
void* operator new(size_t size, const std::nothrow_t &) throw()
{
cout << "Test::operator new(" << size << ", nothrow)\n";
return malloc(size);
}
void operator delete(void *p)
{
cout << "Test::operator delete()\n";
free(p);
}
void operator delete(void *p, align_val_t al)
{
cout << "Test::operator delete(p, align: " << (size_t)al <<
")\n";
free(p);
}
};
int main(void)
{
Test *t;
t = new Test;
delete t;
}
