[Bug c++/30196] New: Variable-length automatic array contents gets destroyed on unrelated exception

[Bug c++/30196] New: Variable-length automatic array contents gets destroyed on unrelated exception

[Tringi at Mx-3 dot cz]

I found this interesting thing. The "array" content is destroyed after the
"catch" statement but it shouldn't be. It behaves the same in MinGW 4.2.0 and
3.4.4 for me. It seems like the "array" is unwound out when the exception is
caught.

---
#include <cstdlib>
#include <cstdio>
#include <stdexcept>

int main () {
    int n = 10;
    int array [n];

    for (int i = 0; i < n; ++i) array [i] = i;

    try {
        for (int i = 0; i < n; ++i) std::printf ("%u,", array [i]);
        std::printf (" = %u\n", n);

        throw 1;

    } catch (int) {
        for (int i = 0; i < n; ++i) std::printf ("%u,", array [i]);
        std::printf (" = %u\n", n);
    };
    return 0;
};


-- 
           Summary: Variable-length automatic array contents gets destroyed
                    on unrelated exception
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: Tringi at Mx-3 dot cz


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30196

[Bug middle-end/30196] VLA and setjumplongjump exceptions

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-12-13 08:37 -------
This is SJLJ related as it works just fine on x86-linux and powerpc-darwin both
uses dwarf2 exceptions.
One should note that VLA are an extension to C++.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c++                         |middle-end
           Keywords|                            |EH, sjlj-eh, wrong-code
            Summary|Variable-length automatic   |VLA and setjumplongjump
                   |array contents gets         |exceptions
                   |destroyed on unrelated      |
                   |exception                   |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30196

[Bug middle-end/30196] VLA and setjumplongjump exceptions

[jconner at apple dot com]

------- Comment #2 from jconner at apple dot com  2007-03-13 23:55 -------
I have a patch for this that I'm testing right now.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30196

[Bug middle-end/30196] VLA and setjumplongjump exceptions

[dannysmith at users dot sourceforge dot net]

------- Comment #3 from dannysmith at users dot sourceforge dot net  2007-03-14 05:57 -------
This is a duplicate of PR 19774

Danny


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30196

[Bug middle-end/30196] VLA and setjumplongjump exceptions

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2007-03-14 06:06 -------


*** This bug has been marked as a duplicate of 19774 ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30196