Unicode-math no bold math or greek letters [duplicate]

Question

What could be causing this?

• I'm on Ubuntu 14.04
• I've uninstalled the Ubuntu TexLive packages and installed TexLive 2015 directly, and just updated today with tlmgr
• I've tried a few different unicode-math compatible fonts and the behavior is the same
• All of the Tex Gyre Termes and Termes Math fonts are installed
• They are installed at the system, not user level.
• I ran luaotfload-tool --update, resulted in no change

MWE below

\documentclass[10pt,letterpaper]{article}

\usepackage{amsmath}
\usepackage{unicode-math}
\usepackage{fontspec}

\defaultfontfeatures{Ligatures=TeX}
\setmainfont{Tex Gyre Termes}
\setmathfont{TeX Gyre Termes Math}

\begin{document}
Here is normal : $\rho$
This one should be bold : $\mathbf{\rho}$
\end{document}

The output is

Notice the missing second \rho.

The relevant log output is below :

Could not resolve font TeX Gyre Termes Math/B (it probably doesn't exist).
.................................................
luaotfload | load : Lookup/name: "TeXGyreTermesMath" -> "texgyretermes-math.otf"
luaotfload | load : Lookup/name: "TeXGyreTermesMath" -> "texgyretermes-math.otf"
luaotfload | aux : font no 26 (TeXGyreTermesMath-Regular) does not define featur
e smcp for script math with language dflt
luaotfload | aux : no font with id 26
luaotfload | load : Lookup/name: "TeXGyreTermesMath" -> "texgyretermes-math.otf"
luaotfload | load : Lookup/name: "TeXGyreTermesMath" -> "texgyretermes-math.otf"
.................................................
. fontspec info: "defining-font"
. 
. Font family 'TeXGyreTermesMath(0)' created for font 'TeX Gyre Termes Math'
. with options
. [Ligatures=TeX,Renderer=Basic,BoldItalicFont={},ItalicFont={},Script=Math,Size
Features={{Size=10-},{Size=7-10,Font=TeX
. Gyre Termes Math,Style=MathScript},{Size=-7,Font=TeX Gyre Termes
. Math,Style=MathScriptScript}}].
. 
. This font family consists of the following shapes:
. 
. * 'normal' with NFSS spec.:
. 
. <10->"TeXGyreTermesMath:mode=base;script=math;language=DFLT;+tlig;+trep;"<7-10
>"TeXGyreTermesMath:mode=base;script=math;language=DFLT;+tlig;+trep;+ssty=0;"<-7
>"TeXGyreTermesMath:mode=base;script=math;language=DFLT;+tlig;+trep;+ssty=1;"
. 
. * 'small caps' with NFSS spec.:
. 
. and font adjustment code:
. 
.................................................
luaotfload | load : Lookup/name: "TeXGyreTermesMath" -> "texgyretermes-math.otf"
luaotfload | load : Lookup/name: "TeX Gyre Termes Math" -> "texgyretermes-math.o
tf"
luaotfload | load : Lookup/name: "TeX Gyre Termes Math" -> "texgyretermes-math.o
tf"
luaotfload | load : Lookup/name: "TeX Gyre Termes Math" -> "texgyretermes-math.o
tf"
luaotfload | load : Lookup/name: "TeX Gyre Termes Math" -> "texgyretermes-math.o
tf"
LaTeX Font Info:    Encoding `OT1' has changed to `EU2' for symbol font
(Font)              `operators' in the math version `normal' on input line 9.
LaTeX Font Info:    Overwriting symbol font `operators' in version `normal'
(Font)                  OT1/cmr/m/n --> EU2/TeXGyreTermesMath(0)/m/n on input li
ne 9.
LaTeX Font Info:    Encoding `OT1' has changed to `EU2' for symbol font
(Font)              `operators' in the math version `bold' on input line 9.
LaTeX Font Info:    Overwriting symbol font `operators' in version `bold'
(Font)                  OT1/cmr/bx/n --> EU2/TeXGyreTermesMath(0)/bx/n on input 
line 9.
luaotfload | load : Lookup/name: "TeX Gyre Termes Math" -> "texgyretermes-math.o
tf"
luaotfload | load : Lookup/name: "TeX Gyre Termes Math" -> "texgyretermes-math.o
tf"
luaotfload | load : Lookup/name: "TeX Gyre Termes Math" -> "texgyretermes-math.o
tf"
luaotfload | load : Lookup/name: "TeX Gyre Termes Math" -> "texgyretermes-math.o
tf"
.................................................

This same entry is repeated for Font family 'TeXGyreTermesMath(1)', Font family 'TeXGyreTermesMath(2)', etc. a few times.

The answer to this question : What's wrong in the \tensor command? works for me, but that question is very esoteric for the problem at hand, and this question is a better fit.