[Bug c++/91585] New: segfault when calling a non void function without a return statement

[lucien.gentis at waika9 dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91585

            Bug ID: 91585
           Summary: segfault when calling a non void function without a
                    return statement
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: lucien.gentis at waika9 dot com
  Target Milestone: ---

Created attachment 46773
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46773&action=edit
file generated when -save-temps option is specified

GCC : 8.3.0
Linux Debian 10 - kernel 4.19.0-5-amd64
Attachment : test1.ii

Hello,

Building following code (see attachement) via command 'gcc -g -Wall -O2
-save-temps test1.cc -o test1'

/////////////////////////////////////////
#include <stdio.h>
int f(int a) {
    printf("function f called - a = %d\n",a);
}
int main(void) {
f(1);
}
/////////////////////////////////////////

compiler output :
test1.cc: In function 'int f(int)':
test1.cc:4:1: warning: no return statement in function returning non-void
[-Wreturn-type]

but if I execute test1, I get :
function f called - a = 1
Erreur de segmentation

Maybe it's not a bug, but since program crashes with a segfault, shouldn't the
compiler send an error instead of a warning ?

PS : same program does not crash if compiled via GCC 7.4.0