Bug#887805: gdl FTBFS with gtk-doc-tools 1.27-1

[Adrian Bunk]

Source: gdl
Version: 3.26.0-2
Severity: serious

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/gdl.html

...
gtkdoc-scan --module=gdl --ignore-headers="gdl-data-* libgdl*" ${_source_dir} --rebuild-types --deprecated-guards="GDL_DISABLE_DEPRECATED" 
Traceback (most recent call last):
  File "/usr/bin/gtkdoc-scan", line 59, in <module>
    scan.Run(options)
  File "/usr/share/gtk-doc/python/gtkdoc/scan.py", line 78, in Run
    ScanHeaders(dir, section_list, decl_list, get_types, options)
  File "/usr/share/gtk-doc/python/gtkdoc/scan.py", line 140, in ScanHeaders
    ScanHeader(fullname, section_list, decl_list, get_types, options)
  File "/usr/share/gtk-doc/python/gtkdoc/scan.py", line 229, in ScanHeader
    for line in common.open_text(input_file):
  File "/usr/lib/python2.7/codecs.py", line 701, in next
    return self.reader.next()
  File "/usr/lib/python2.7/codecs.py", line 632, in next
    line = self.readline()
  File "/usr/lib/python2.7/codecs.py", line 547, in readline
    data = self.read(readsize, firstline=True)
  File "/usr/lib/python2.7/codecs.py", line 494, in read
    newchars, decodedbytes = self.decode(data, self.errors)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe1 in position 0: invalid continuation byte
Makefile:719: recipe for target 'scan-build.stamp' failed
make[4]: *** [scan-build.stamp] Error 1