Ocamldoc hangs when module references itself

[vicuna]

Original bug ID: 7331
Reporter: andy
Assigned to: @Octachron
Status: resolved (set by @Octachron on 2017-03-08T13:12:46Z)
Resolution: fixed
Priority: normal
Severity: major
Platform: x64
OS: Linux Mint
OS Version: 17.3
Version: 4.03.0
Target version: 4.06.0 +dev/beta1/beta2/rc1
Category: ocamldoc
Monitored by: @gasche

Bug description

The presence of the module rec M: sig ... end = M construct causes ocamldoc to hang.

Steps to reproduce

mkdir repro && cd repro
echo "module rec M: sig end = M" > main.ml
ocamldoc -html main.ml

It never finishes.

[vicuna]

Comment author: @alainfrisch

An infinite loop -- even in ocamldoc -- is not a minor issue, bumping severity.

[vicuna]

Comment author: @Octachron

I have proposed a fix for this infinite loop in #1085.

[vicuna]

Comment author: @Octachron

This issue has been fixed for OCaml >=4.05 by merging the above github PR.