unison @2.40.102_1 fails when built with OCaml 4.02 with segmentation fault

[seh@…]

After upgrading to Mac OS Yosemite, I reinstalled all my ports, and found that unison version 2.40.102_1 crashes immediately upon trying to synchronize. I can start unison and get it to dump its usage and help messages, but supplying a profile name and asking it to synchronize cause it to fail with a segmentation fault.

Using a profile name of "gnus":

% unison gnus           
??hzsh: segmentation fault  unison gnus

Trying again with debug output enabled:

  % unison gnus -debug all
  [startup] Preferences:
  ui = graphic
  [...]
  addprefsto = 
  ??hzsh: segmentation fault  unison gnus -debug all

Find a crash report attached.

[seh@…]

Mac OS crash report for unison

[0815dev@…]

I can confirm the problem.

Starting 'unison -ui text' results to:

???Segmentation fault: 11

Here is someone who compiled unison manual:

​http://www.outofbounds.gr/blog/posts/how-to-build-unison-command-line-on-yosemite

[0815dev@…]

Cc Me!

[paul.dean.bailey@…]

​http://www.outofbounds.gr/blog/posts/how-to-build-unison-command-line-on-yosemiteThis blogger claims to have compiled Unison for Yosemite

Sorry, just realized that the second comment I skimmed over has the exact same link.

[gpf@…]

Cc Me!

[jxy (Xiao-Yong)]

Cc Me!

[inyeollee]

Cc Me!

[mni@…]

Cc Me!

[gpf@…]

Looks like there is a ​fix for this, I manually downloaded the unison source bundle ​unison-2.40.102.tar.gz, fixed the file ubase/util.ml and compiled with make UISTYLE=text and I now have a working unison binary.

[ecronin (Eric Cronin)]

Thanks, r127145

[ecronin (Eric Cronin)]

Also note that OCaml 4.02 changed the network marshaling format again, so both client and server need to be built with the same OCaml release.

[kenyon@…]

Cc Me!

[majoc-at-astro (majoc-at-astro)]

Cc Me!