GDBM 1.11, 1.13 incorrectly handle gdbm_reorganize() if filesystem is NFS

Hello, 
I'm using new (not yet merged) gdbm Zsh module. It maps shell's hash table onto GDBM. Current Zsh upstream has previous version, but it behaves the same. 

If I don't comment-out gdbm_reorganize() call, then: 


% gdbmtool ./db.gdbm 

Welcome to the gdbm tool.  Type ? for help. 

gdbmtool> list 
stdin:1.5: cannot open database db.gdbm: Can't be writer 
gdbmtool> 


even after "unbind" done in Zsh. I've checked that the unbind correctly calls gdbm_close(). 

Commenting-out gdbm_reorganize() call fixes this. This is a proof that gdbm_close() is really called, 100% of problem lies in gdbm_reorganize(). 

So basically the error is: 

- with NFS file-system, gdbm_reorganize() harms GDBM_FILE structure so that gdbm_close() doesn't release the database, and it's impossible to connect to the database again, if no restart of shell. 

--  
Sebastian Gniazdowski
psprint /at/ zdharma.org