Package: otags Version: 4.01.1-2 Followup-For: Bug #802166 I ran into this bug too. Here's some output that might be helpful:
$ sudo update-otags [sudo] password for amu: Fatal error: escaping exception File "tags.ml", line 361, characters 32-37: Pattern matching failed Please rerun otags with -v as *first* option to get a backtrace and send the command line, the input files and the backtrace as bug report to ot...@askra.de $ sudo otags -v -parser-hints /usr/share/otags/hints -r -o /var/lib/otags/TAGS `ocamlc -where` Descend into directory /usr/lib/ocaml [...] Process /usr/lib/ocaml/stdLabels.mli internally as signature with parsers [r; o] Escaping exception during processing /usr/lib/ocaml/stdLabels.mli Escaping exception during processing /usr/lib/ocaml Fatal error: escaping exception File "tags.ml", line 361, characters 32-37: Pattern matching failed Called from file "list.ml", line 73, characters 12-15 Called from file "otags.ml", line 220, characters 5-50 Called from file "otags.ml", line 284, characters 4-92 Re-raised at file "otags.ml", line 293, characters 12-13 Called from file "otags.ml", line 469, characters 11-41 Re-raised at file "otags.ml", line 476, characters 7-8 Called from file "list.ml", line 73, characters 12-15 Called from file "otags.ml", line 509, characters 2-64 Called from file "otags.ml", line 520, characters 4-11 Please send the command line, the input files and the output above as bug report to ot...@askra.de -- System Information: Debian Release: stretch/sid APT prefers testing APT policy: (500, 'testing'), (500, 'stable'), (300, 'unstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.2.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages otags depends on: ii camlp4 [camlp4-extra] 4.02.1+3-2 ii libc6 2.19-22 ii libcamlp4-ocaml-dev [libcamlp4-ocaml-dev-p9wj7] 4.02.1+3-2 ii ocaml-nox [ocaml-nox-4.02.3] 4.02.3-5 otags recommends no packages. otags suggests no packages. -- no debconf information