Re: ar: error: libclang.a: 'ParseDecl.o': section header table goes past EOF

On Tue, May 05, 2026 at 11:37:12AM -0700, Mark Millard wrote:
> On 5/5/26 07:48, bob prohaska wrote:
> > A Pi2B (armv7) is failing buildworld with:
> > 
> > Building static clang library
> > ar: error: libclang.a: 'ParseDecl.o': section header table goes past the end of 
> > the file: e_shoff = 0x131190
> 
> That error message can happen for the file content being corrupted. One
> form of corruption can be truncated because of running out of file
> system space. But there can be many others. Failed writes or later
> read-back problems are possibilities. Bad RAM content that was written
> out could be involved.
> 
> Did you check the console output/log for any messages that might have
> been from the time frame(s) for the file generation or read-back?
> 
> > *** [libclang.a] Error code 1
> > ....
> > make[4]: stopped making "all" in /usr/src/lib/clang/libclang
> > .ERROR_TARGET='libclang.a'
> > .ERROR_META_FILE='/usr/obj/usr/src/arm.armv7/tmp/obj-tools/lib/clang/libclang/li
> > bclang.a.meta'
> > .MAKE.LEVEL='4'
> > ............
> > 
> > /usr/src was updated 5/4/26.
> > 
> > Re-running git pull reports:
> > Updating 8e8d87856241..9f2ad7c09709
> > and it looks as if only sbin and sys
> > files have changed.
> >  
> > I'll run a make cleandir and try again. If there are
> > other things to try please let me know.
> 
> There are a rather wide range of possibilities. If it turns out to not
> be readily reproducible, then the details may never be known.

It seems reproducible to the extent that re-running buildworld provokes
the same error after running make cleandir.

Thanks for writing,

bob prohaska