Problem cross-compiling crystal for aarch64

Hi,

I’m trying to compile crystal for aarch64, but I seem to be doing something wrong, although I’m following the same process I use to cross compile crystal for the raspberryPI (armv6k instead of aarch64)

 mavu   0.31.1 … 3  ~  repo  crystal  ./bin/crystal build src/compiler/crystal.cr \
--cross-compile --target  aarch64-unknown-linux-gnu -s\
 -D without_openssl -D without_zlib --error-trace
Parse:                             00:00:00.000069590 (   0.25MB)
Semantic (top level):              00:00:00.479664284 ( 107.45MB)
Semantic (new):                    00:00:00.003108121 ( 107.45MB)
Semantic (type declarations):      00:00:00.092128343 ( 107.45MB)
Semantic (abstract def check):     00:00:00.019240536 ( 107.45MB)
Semantic (ivars initializers):     00:00:05.091040222 ( 829.38MB)
Semantic (cvars initializers):     00:00:00.005494200 ( 829.38MB)
Semantic (main):                   00:00:03.614841627 ( 943.38MB)
Semantic (cleanup):                00:00:00.150294416 ( 959.38MB)
Semantic (recursive struct check): 00:00:00.002595119 ( 959.38MB)
Codegen (crystal):                 00:00:05.487782385 (1231.38MB)
Invalid memory access (signal 11) at address 0x20
[0x7f49017bdfc6] ???
[0x7f4901713f4e] ???
[0x7f490258b461] ???

This command works if I use “armv6k-unknown-linux-gnueabihf” as target instead.
Any ideas?
Should I make a bug report?