7377 – Compiler segfault in: TemplateMixin::hasPointers()

Using the latest built dmd/phobos/druntime code from git I get a compiler core dump:
Core was generated by `dmd -I../.. -g -debug -od../.obj -of../.obj/variant common.d variant.d ../teg/s'.
Program terminated with signal 11, Segmentation fault.
#0 0x00000000004f7a2f in TemplateMixin::hasPointers() ()
(gdb) bt
#0 0x00000000004f7a2f in TemplateMixin::hasPointers() ()
#1 0x000000000050cc0e in ClassDeclaration::toObjFile(int) ()
#2 0x00000000004a024f in Module::genobjfile(int) ()
#3 0x0000000000403c4f in main ()
I'm trying to build a minimal test case. dmd 2.047 has other compilation segfaults affecting my code, I'm a little worried I'll never be able to build my code with any D compiler above 2.046 again ;)

Sorry meant 2.056.
I fixed it... have a patch.

Created attachment 1070 [details] 
Fixes this bug entirely... dereference of null.

Commit pushed to master at https://github.com/D-Programming-Language/dmd
https://github.com/D-Programming-Language/dmd/commit/1faafe155a3b80c4dfcee923f6312dc4f29cc9e7
Merge pull request #649 from nuisanceofcats/master
Fix issue 7377, compiler segfault via null pointer dereference

Commit pushed to dmd-1.x at https://github.com/D-Programming-Language/dmd
https://github.com/D-Programming-Language/dmd/commit/21cf12232acf37dcb7c9b9078a58b4338deb346c
fix issue 7377 

I really wonder why members is NULL.