Re: sparse segv with simple test

[Kamil Dudka <kdudka@redhat.com>]

On Monday 31 of August 2009 17:57:58 Stephen Hemminger wrote:
> Not sure why, but the crash went away after a 'make clean; make' so maybe
> something was stale on that machine?

Could be ... outdated depfiles, skewed mtimes, etc.

> It still doesn't give any warnings. about assigning an enum with a value
> out of range thou.

AFAICT it is not supposed to issue a warning in that case. Here is an example 
which is caught by the check:

static void f(void) {
    enum A { VAL_A } a = VAL_A;
    enum B { VAL_B } b = a;
}

$ sparse enum.c
enum.c:3:26: warning: mixing different enum types
enum.c:3:26:     int enum A  versus
enum.c:3:26:     int enum B

Note that you don't even need to write -Wenum-mismatch since it's default.

But it might be good idea to implement such out-of-range detection ;-)

Kamil