Cannot build loom jdk after recent changes

[Alan Bateman]

On 15/12/2019 20:38, Arkadiusz Gasiński wrote:
> Well, my current JAVA_HOME points to the loom JDK that I built like a 
> week ago and I assume that it's my boot JDK
Can you blow away your build directory and re-run configure with the 
`--with-boot-jdk` option set to a JDK 13? It is possible for a JDK build 
to re-build itself (the so-called "bootcycle build") but building a JDK 
with a mismatch build of itself is never reliable and has never been a 
supported way to do the build (yes, it does work sometimes, not others; 
the errors when it fails are always hard to decipher).

-Alan