PDF icon in modeline renders as #_(

[peschkaj]

The icons for PDFs in my modeline (using spaceline-all-the-icons-20190325.1602 and all-the-icons-20190320.1809) render as #_(. The usual other file types (.c, .hs, .el, etc) all get their icon rendered. PDFs are being rendered via pdf-tools.

If I evaluate (insert (all-the-icons-icon-for-file "foo.pdf")), I get a happy little PDF icon.

I have verified that fonts are installed correctly. In addition, I reviewed the troubleshooting steps for all-the-icons, but I didn't see a way to identify this particular issue.

Current environment is:
Linux (Arch 5.1.15)
emacs 26.2
all-the-icons-20190320.1809
pdf-tools-20190701.202
spaceline-20181223.2024
spaceline-all-the-icons-20190325.1602