segmentation fault ?

[hr1212s]

if we construct anonymous static union ,at file scope my compiler(gcc) gives error:segmentation fault
why this is so!

static union{int a;};

int main()
{
    return 0;
}

it is simplified code,
i'm using code::blocks 8.02 (it uses gcc).
is it non standard thing or it's my compiler's fault?

[hk_mp5kpdw]

It's [/code] not [\code].

[Brafil]

Your code doesn't make any sense. A static union definition that is never used? Although, it doesn't crash for me.

[rodrigorules]

I don't get a segmentation fault..

[hr1212s]

Your code doesn't make any sense. A static union definition that is never used? Although, it doesn't crash for me.

it is simplified code,
i'm using code::blocks 8.02 . is it non standard thing or it's my compiler's fault?

[laserlight]

So, you are saying that this simplified program demonstrates the problem?

[hr1212s]

So, you are saying that this simplified program demonstrates the problem?

yes it gives me error

[MK27]

it is simplified code,
i'm using code::blocks 8.02 . is it non standard thing or it's my compiler's fault?

It compiles and runs fine with gcc 4.3.2 (and g++).

Are you talking about the "simplified" code example, or the "real code"?

yes it gives me error

What error?

[laserlight]

Oh, now I understand. I originally tried using the same compiler that is bundled with one Code Blocks installation package, but did not see any problem when I lazily compiled with no options.

Now, I compiled with -Wall and -pedantic, and discovered that with -Wall the compiler has an internal error in which the error message states a segmentation fault with involved. The answer to your question is given right there: you are looking at a genuine compiler bug.

[EVOEx]

Oh, now I understand. I originally tried using the same compiler that is bundled with one Code Blocks installation package, but did not see any problem when I lazily compiled with no options.

Now, I compiled with -Wall and -pedantic, and discovered that with -Wall the compiler has an internal error in which the error message states a segmentation fault with involved. The answer to your question is given right there: you are looking at a genuine compiler bug.

Yes, I agree. In fact, any segfault from any program is a bug in the specific program. So even if your code is buggy as hell; if it makes the compiler crash, it's a problem on the compiler's side. It should in stead produce meaningful error messages on what you did wrong.

[hr1212s]

oh thanks guys,
during this i found link Anonymous Union
which point to same conclusion that, this code is fine and error is bug of compiler

[hr1212s]

Oh, now I understand. I originally tried using the same compiler that is bundled with one Code Blocks installation package, but did not see any problem when I lazily compiled with no options.

Now, I compiled with -Wall and -pedantic, and discovered that with -Wall the compiler has an internal error in which the error message states a segmentation fault with involved. The answer to your question is given right there: you are looking at a genuine compiler bug.

hey ,will you please give some idea about what -Wall and -pedantic does in code::blocks !
i haven't find it on google.

[tabstop]

hey ,will you please give some idea about what -Wall and -pedantic does in code::blocks !
i haven't find it on google.

GCC online documentation - GNU Project - Free Software Foundation (FSF)

[MK27]

I guess you should upgrade your gcc, as I said there is no problem with 4.3.2, which is several years old (I think the current one is 4.4).

-Wall is very useful, there must be some setting in Code::Blocks to turn this on by default.

[jeffcobb]

Actually I am still stuck trying to figure out what the point of a union with only one member could be...is this a result of the code simplification?