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Date: Sun, 08 Jan 2017 15:08:00 -0000
From: Stefan Kempf <sisnkemp@gmail.com>
To: overseers@gcc.gnu.org
Subject: Bugzilla account creation
Message-ID: <20170108150818.GA26173@murdock.my-fqdn.de>
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Hello,

could you please open a bugzilla account at gcc.gnu.org for
sisnkemp@gmail.com? The webpage says account creation is
filtered because of spammers.

I want to report this internal compiler error/segfault for gcc versions
6.1, 6.2, 6.3:
When compiling the example below with gcc 6.x on GNU/Linux x86_64 or
OpenBSD/amd64, gcc crashes (internal compiler error: segmentation fault)

$ gcc -O2 -pipe -c input.i
input.i: In function 'void doit()':
input.i:32:6: internal compiler error: Segmentation fault
void doit() {
^~~~
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


input.i:

extern "C" {
float sqrtf(float);
}

class T {
public:
 float floats[1];

 inline float length() const {
  return sqrtf(floats[0]);
 }
};

void destruct(void *);

class Container {

 T Ts[1];

public:
  ~Container() {
    destruct((void *)Ts);
  }

  T& operator[](int n) {
   return Ts[0];
  }
};

void fill(Container&);

void doit() {
 Container data;
 float max = 10;

 int i, j, k;

 for (i = 0; i < 10; i++) {
  for (j = 1; j < 10; j++) {
   if (max < 5)
    break;
   fill( data);
   max = data[0].length();
   for (k = 1; k < j; k++) {
     max = 5;
   }
  }
 }
}