Public bug reported:
In Ubuntu 18.04 armhf with gcc-7, the following code, which compiles
normally, gives incorrect result (on my machine, -964176505 instead of
correct value 1).
#include <setjmp.h>
#include <stdio.h>
jmp_buf a[10] ;
jmp_buf * volatile sp = a ;
int main()
{
if (setjmp(*sp++) == 0) {
printf("diff=%td\n", sp-a) ;
return 0 ;
}
return 1 ;
}
Additional information:
The above code gives correct answer on Ubuntu 16.04 x86_64 gcc 5.4.
If I replace '*sp++' with '*++sp', the program gives correct value 1.
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: armhf gcc setjmp
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https://bugs.launchpad.net/bugs/1826820
Title:
calling setjmp destruct a variable
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