Using xmplay 3.8.3.4 (latest as of sep 1 2018).
The crash occurs when I dragged over multiple files to XMP. and it tries to calculate the track length. Seems to apply to
.v2m files specifically when calculating their track lengths. Loading .v2m files one at a time works fine.
I've narrowed it down to 2 plugins (3 if you include the in_v2m.dll):
in_ncsf.dll and
xmp-zxtune.dll. Strange combination. Neither of these plugins play v2m files. But only if they are
BOTH present, this crash will occur:

The XMP interface works still, but it's stuck in "track titles updating" mode indefinitely. Closing the error message closes XMPlay.
I've included the winamp plugins and v2m test files as attachments, xmp-zxtune.dll can be found
here. in_ncsf source code
here. in_v2m source code is
here.
To reproduce the bug: load the plugins, drag a .v2m file into the playlist at a fresh start, it should crash.