Bug#847158: libghc-hsh-dev: fails to run any command with "Missing field..."

[Samuel Hym]

Package: libghc-hsh-dev
Version: 2.1.2-6+b1
Severity: important

Dear Maintainer,

HSH is currenty broken in unstable: running a command triggers an
exception. For instance, in GHCi:

Prelude> :m +HSH
Prelude HSH> run $ "echo /etc/pass*" :: IO String
*** Exception: HSH/Command.hs:(289,14)-(304,28): Missing field in record construction child_group

Best regards,

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.8.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=es_AR.UTF-8, LC_CTYPE=es_AR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libghc-hsh-dev depends on:
ii  ghc [libghc-unix-dev-2.7.2.0-220bd]                        8.0.1-14
ii  libc6                                                      2.24-7
pn  libghc-base-dev-4.9.0.0-5e731                              <none>
pn  libghc-bytestring-dev-0.10.8.1-58b19                       <none>
pn  libghc-directory-dev-1.2.6.2-958b8                         <none>
pn  libghc-filepath-dev-1.4.1.0-6e799                          <none>
ii  libghc-hslogger-dev [libghc-hslogger-dev-1.2.10-8c36b]     1.2.10+dfsg-3+b1
ii  libghc-missingh-dev [libghc-missingh-dev-1.4.0.1-3e847]    1.4.0.1-2+b1
ii  libghc-mtl-dev [libghc-mtl-dev-2.2.1-3d1c9]                2.2.1-5
pn  libghc-process-dev-1.4.2.0-e39cb                           <none>
ii  libghc-regex-base-dev [libghc-regex-base-dev-0.93.2-7601d  0.93.2-10+b1
ii  libghc-regex-compat-dev [libghc-regex-compat-dev-0.95.1-d  0.95.1-10+b1
ii  libghc-regex-posix-dev [libghc-regex-posix-dev-0.95.2-c4a  0.95.2-9+b1
ii  libgmp10                                                   2:6.1.1+dfsg-1

libghc-hsh-dev recommends no packages.

Versions of packages libghc-hsh-dev suggests:
ii  libghc-hsh-doc   2.1.2-6
pn  libghc-hsh-prof  <none>

-- no debconf information