The following code runs fine, but gave an assert error at the end, does anyone know why?

// this code gave "Error: AssertError Failure test2(12)"
import std.stdio;

int main()
{
char[][] list;
list.length = 5;
for(int i =0; i < 5; i++) {
list[i] = "hello";
}

for(int i=0; i < 5; i++)
writefln(list[i]);
}


Ok, I know this is a D forum, but what inspired me to write the above program was the following C program, which gives

"""3 [main] a 3348 handle_exceptions: Exception: STATUS_ACCESS_VIOLATION 20385 [main] a 3348 open_stackdumpfile: Dumping stack trace to a.exe.stackdump"""

on gcc, and on VS6.0, it simply says "Visual Studio has encountered an error and needs to close"

# include <stdio.h>
# include <stdlib.h>
# include <string.h>

int main()
{
int i;
char** list;
list = (char**)malloc(5*sizeof(char*));
for(i=0; i < 5; i++) {
list[i] = (char*)malloc(10*sizeof(char));
strcpy(list[i], "hello");
}

for(i=0; i < 5; i++)
printf("%s\n", list[i]);
/*freeing pointers here*/
}

What really baffles me is that if I replace
"  for(i=0; i < 5; i++)
printf("%s\n", list[i]);  "

with
" printf("%s\n", list[0]);
printf("%s\n", list[1]);
printf("%s\n", list[2]);
printf("%s\n", list[3]);
printf("%s\n", list[4]); "

the program runs fine. No errors, and it actually gives the right output. Does anyone know why?

-Jerry

On Sat, 06 Aug 2005 18:29:58 -0400, Jerry <Jerry_member@pathlink.com> wrote:

> The following code runs fine, but gave an assert error at the end, does anyone
> know why?
>
> // this code gave "Error: AssertError Failure test2(12)"
> import std.stdio;
>
> int main()
> {
> char[][] list;
> list.length = 5;
> for(int i =0; i < 5; i++) {
> list[i] = "hello";
> }
>
> for(int i=0; i < 5; i++)
> writefln(list[i]);
> }

Return something from main.

Vathix wrote:

> The following code runs fine, but gave an assert error at the end, does anyone
> know why?
> 
> // this code gave "Error: AssertError Failure test2(12)"
> import std.stdio;
> 
> int main()
> {
> char[][] list;
> list.length = 5;
> for(int i =0; i < 5; i++) {
> list[i] = "hello";
> }
> 
> for(int i=0; i < 5; i++)
> writefln(list[i]);
> }
<snip>
> Return something from main.

As much as Walter's tried to pretend otherwise, the OP's code is invalid, and it's a bug that the compiler doesn't report an error.

http://www.digitalmars.com/d/statement.html#return

"At least one return statement is required if the function specifies a return type that is not void."

This is one of the most common questions on these 'groups.  Time to fix?

Stewart.

-- 
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