Re: Build failure with Clang/LLVM 22 due to alloc-size diagnostic

On Donderdag 18 September 2025 14:29:36 UTC Zhenlei Huang wrote:
> > On Sep 18, 2025, at 7:17 PM, Nakayama Kenjiro <nakayamakenjiro@gmail.com>
> > ...
> > freebsd/sys/netinet/in_mcast.c:749:10: error: allocation of insufficient
> > size '40' for type 'struct ip_msource' with size '48'
> > ...
> The following lines has this
> ```
> lims = (struct in_msource *)nims;
> ```
> 
> So probably assign the alloced memory directly to lims would make Clang
> happy, say ```
> lims = malloc(sizeof( .... ;
> nims = (struct ip_mfilter *)lims;
> ```
> 
> You can have a try with that. Good luck with you !

ideally, clang will eventually get around to complaining about that type cast on the same 
basis (destination points to a longer object than the source.) is there a reason we're not 
using a union{} for this data?

-- 
Paul Vixie