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Re: [vox-tech] gdb segfaults when printing long double complexvariables
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Re: [vox-tech] gdb segfaults when printing long double complexvariables



I know it does not help, but it is reproducible here on gdb 6.1. Mind if I point this out in the Gentoo Forums and Bug Site?

Dan

Peter Jay Salzman wrote:
Bug: GDB segfaults when printing long double complex variables.

Sample Code:

1 #include <tgmath.h>
2 #include <stdio.h>
3
4 int main(void)
5 {
6 complex a;
7 double complex b;
8 long double complex c;
9
10 a = 5 + 2I;
11 printf("%f + %fi\n", __real__ a, __imag__ a);
12
13 b = 5.0 + 2.0I;
14 printf("%f + %fi\n", __real__ b, __imag__ b);
15
16 c = 5.0L + 2.0LI;
17 printf("%Lf + %Lfi\n", __real__ c, __imag__ c);
18
19 return 0;
20 }



The program runs fine:

p@satan$ gcc-3.3 -g -W -Wall blah.c p@satan$ ./a.out 5.000000 + 2.000000i
5.000000 + 2.000000i
5.000000 + 2.000000i

The program runs fine under gdb:

(gdb) run
Starting program: /home/p/a.out 5.000000 + 2.000000i
5.000000 + 2.000000i
5.000000 + 2.000000i

Program exited normally.

But GDB itself cannot print long double complex variables without
segfaulting:

(gdb) break 18
Breakpoint 1 at 0x8048436: file blah.c, line 18.
(gdb) run
Starting program: /home/p/a.out 5.000000 + 2.000000i
5.000000 + 2.000000i
5.000000 + 2.000000i

Breakpoint 1, main () at blah.c:19
19 return 0;
(gdb) p a
$1 = 5 + 2 * I
(gdb) p b
$2 = 5 + 2 * I
(gdb) p c
Segmentation fault (core dumped)

This is very reproducible, unfortunately. This bug showed up at the
worst possible moment...

Pete

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