Segfaults when staging into destroot

[Dave Murray-Rust]

Hi All,

I'm having real hassles with port - most packages fail to install,  
with a segfault, e.g.:

groke:503:dave>port install tiff
--->  Fetching zlib
--->  Verifying checksum(s) for zlib
--->  Extracting zlib
--->  Applying patches to zlib
--->  Configuring zlib
--->  Building zlib with target all
--->  Staging zlib into destroot
tclsh(394) malloc: *** error for object 0x312770: double free
tclsh(394) malloc: *** set a breakpoint in szone_error to debug
tclsh(394) malloc: *** error for object 0x312770: double free
tclsh(394) malloc: *** set a breakpoint in szone_error to debug
tclsh(394) malloc: *** error for object 0x312770: double free
tclsh(394) malloc: *** set a breakpoint in szone_error to debug
--->  Installing zlib 1.2.3_1
tclsh(394) malloc: *** error for object 0x313760: double free
tclsh(394) malloc: *** set a breakpoint in szone_error to debug
tclsh(394) malloc: *** error for object 0x313790: double free
tclsh(394) malloc: *** set a breakpoint in szone_error to debug
tclsh(394) malloc: *** error for object 0x3137f0: double free
tclsh(394) malloc: *** set a breakpoint in szone_error to debug
Segmentation fault


At other times, I get a bus error but I didn't save a copy/paste of  
that, and it's not reproducible.

I've tried using a different tclsh, but the same problem persists.  
I'm not certain whether port is using the new one... I've exported  
PATH=/usr/local/bin, and which tclsh points to the newly installed  
ActiveState tclsh, but I don't know if port uses its own internal  
version or something?

Any suggestions on where to start debugging this?

So far I've tried uninstalling and reinstalling, selfupgrade, moving  
fink (/sw) out of the way in case it was causing a conflict, but with  
no luck. I get this problem on almost all packages. Interestingly, it  
was not there originally - at least, there are some packages which I  
had installed before I removed and reinstalled port, which now fail  
to install.

Thanks for any help,
dave