pangoをインストールできません。

###前提・実現したいこと
popplerインストールしてpdf解析を行いたいです。

popplerをインストールする前に複数のプラグインをインストールする必要があるみたいです。
4つ目のインストールで失敗しました。

###発生している問題・エラーメッセージ

$ brew install pango
/nix/store/d20f169ryps7ds2qak0r5n1f4hhxr80h-bash-4.3-p42/bin/bash: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8)
/nix/store/vakzwhjzd46jyg7ry1spz4fyqlcjnny4-git-2.8.0/libexec/git-core/git-sh-setup: line 169: warning: setlocale: LC_ALL: cannot change locale (C.UTF-8)
==> Installing dependencies for pango: gobject-introspection, icu4c, harfbuzz
==> Installing pango dependency: gobject-introspection
==> Downloading https://download.gnome.org/sources/gobject-introspection/1.50/gobject-introspection-1.50.0.tar.xz
Already downloaded: /home/ubuntu/.cache/Homebrew/gobject-introspection-1.50.0.tar.xz
==> ./configure --prefix=/home/ubuntu/.linuxbrew/Cellar/gobject-introspection/1.50.0 PYTHON=python
==> make
Last 15 lines from /home/ubuntu/.cache/Homebrew/Logs/gobject-introspection/02.make:
  File "./giscanner/girparser.py", line 31, in <module>
    from .girwriter import COMPATIBLE_GIR_VERSION
  File "./giscanner/girwriter.py", line 29, in <module>
    from .xmlwriter import XMLWriter
  File "./giscanner/xmlwriter.py", line 44, in <module>
    from _giscanner import collect_attributes
  File "./giscanner/libtoolimporter.py", line 68, in load_module
    mod = imp.load_module(name, open(realpath), realpath, suffix)
ImportError: ./.libs/_giscanner.so: undefined symbol: PyUnicodeUCS2_AsUTF8String
make[2]: *** [GLib-2.0.gir] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory `/tmp/gobject-introspection-20170304-411939-1qc6xb4/gobject-introspection-1.50.0'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/tmp/gobject-introspection-20170304-411939-1qc6xb4/gobject-introspection-1.50.0'
make: *** [all] Error 2

READ THIS: https://github.com/Linuxbrew/brew/blob/master/docs/Troubleshooting.md#troubleshooting