$ xdvipdfmx -E -vv test.xdv
<FONTMAP:D:/Full_TeX/texmf/dvipdfm/config/dvipdfm.map>test.xdv -> test.pdf
DVI Comment:  XeTeX output 2018.03.11:1731
<AGL:texglyphlist.txt><AGL:pdfglyphlist.txt><AGL:glyphlist.txt>[1<D:/Full_TeX/texmf/fonts/type1/public/cm-unicode/[email protected]<NATIVE-FONTMAP:D:/Full_TeX/texmf/fonts/type1/public/cm-unicode/cmunrm.pfb/0/H/65536/0/0>
fontmap: D:/Full_TeX/texmf/fonts/type1/public/cm-unicode/cmunrm.pfb/0/H/65536/0/0 -> D:/Full_TeX/texmf/fonts/type1/public/cm-unicode/cmunrm.pfb(Identity-H)

pdf_font>> Input encoding "Identity-H" requires at least 2 bytes.
pdf_font>> The -m <00> option will be assumed for "D:/Full_TeX/texmf/fonts/type1/public/cm-unicode/cmunrm.pfb".
(CID:CMUSerif-Roman)
pdf_font>> Type0 font "D:/Full_TeX/texmf/fonts/type1/public/cm-unicode/cmunrm.pfb" cmap_id=<Identity-H,0> opened at font_id=<D:/Full_TeX/texmf/fonts/type1/public/cm-unicode/cmunrm.pfb/0/H/65536/0/0,0>.
>](CID:D:/Full_TeX/texmf/fonts/type1/public/cm-unicode/cmunrm.pfb[YAVPDZ+CMUSerif-Roman][CIDFontType0]
xdvipdfmx:warning: Obsolete four arguments of "endchar" will be used for Type 1 "seac" operator.
xdvipdfmx:fatal: This font using the "seac" command for accented characters...

Output file removed.