The fix in JDK-8199467 did not seem to help. I still get this (very similar) error:

c:/erik/jdk/open/src/java.instrument/share/native/libinstrument/Reentrancy.c(93): error C2220: warning treated as error - no 'object' file generated
c:/erik/jdk/open/src/java.instrument/share/native/libinstrument/Reentrancy.c(93): warning C4312: 'type cast': conversion from 'unsigned long' to 'void *' of greater size
Lib-java.instrument.gmk:52: recipe for target '/cygdrive/c/erik/jdk/build/VS2017/support/native/java.instrument/libinstrument/Reentrancy.obj' failed