Bug#947289: postgis: library linking error renders database unusable

[patrick noll]

Package: postgis
Version: 3.0.0+dfsg-6
Severity: important

Dear Maintainer,

After an upgrade last night, my postgis enabled database is returning ERROR:  could not load library "/usr/lib/postgresql/11/lib/postgis-2.5.so": /usr/lib/x86_64-linux-gnu/libSFCGAL.so.1: undefined symbol: _ZlsRSoPK12__mpz_struct for all queries.


-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (900, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.2.0-3-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages postgis depends on:
ii  libc6         2.29-3
ii  libgdal20     2.4.3+dfsg-1+b1
ii  libgeos-c1v5  3.8.0-1
ii  libpq5        12.1-1
ii  libproj15     6.2.1-1

Versions of packages postgis recommends:
ii  postgis-doc              3.0.0+dfsg-6
ii  postgresql-12-postgis-3  3.0.0+dfsg-6

Versions of packages postgis suggests:
pn  postgis-gui  <none>

-- no debconf information