mono-6.8 build failure under -current

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

Hi,

I am getting:
....
Core was generated by `mono'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007e60351860ca in ?? ()
[Current thread is 1 (process 10)]
(gdb) bt
#0  0x00007e60351860ca in ?? ()
#1  0x00007e603518646a in ?? ()
#2  0xffffffffffffffdf in ?? ()
#3  0xffffffffffffffff in ?? ()
#4  0x00000000006fac20 in ?? ()
#5  0x00000000006f9699 in ?? ()
#6  0x00007e6028def9d0 in ?? ()
#7  0x0000000000454a58 in mono_aot_trampoline (regs=0x7e602baaa040,
code=0x7e6028def800 "", token_info=<optimized out>,
    tramp=0x7e6000000001 <error: Cannot access memory at address
0x7e6000000001>) at mini-trampolines.c:945
#8  0x00007e6035ba7070 in ?? ()
#9  0x00007e6028defd70 in ?? ()
#10 0x00007e6035a4cd28 in ?? ()
#11 0x000000002bac2000 in ?? ()
#12 0x00007e60362e5000 in ?? ()
#13 0x0000000000000000 in ?? ()
....

trying to build mono-6.8.0.105 under -current amd64. The end of the
log is as follows:
....
gmake[10]: Entering directory
'/usr/pkgsrc/lang/mono6/work/mono-6.8.0.105/mcs/class/Facades/System.Reflection'
cat <./../../../build/deps/unix_build_Facades_System.Reflection.dll.sources
>../../../build/deps/unix_build_Facades_System.Reflection.dll.response
mono  /usr/pkgsrc/lang/mono6/work/mono-6.8.0.105/external/roslyn-binaries/Microsoft.Net.Compilers/3.5.0/csc.exe
/shared:monomake /codepage:65001 /nologo /noconfig /deter
ministic   -d:NET_4_0 -d:NET_4_5 -d:MONO -d:WIN_PLATFORM
-d:BOOTSTRAP_BASIC -nowarn:1699 -nostdlib -optimize
/features:peverify-compat /langversion:latest  /delaysign /n
owarn:1616,1699  -r:./../../../class/lib/build-unix/mscorlib.dll
/keyfile:../../msfinal.pub  -target:library
-out:../../../class/lib/build-unix/Facades/System.Reflectio
n.dll  @./../../../build/deps/unix_build_Facades_System.Reflection.dll.response

=================================================================
        Native Crash Reporting
=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================

=================================================================
        Basic Fault Address Reporting
=================================================================
Memory around native instruction pointer
(0x7e6035c0c335):0x7e6035c0c325  e8 9a fa ff ff 8b 44 24 0c eb 49 48
85 f6 74 09  ......D$..IH..t.
0x7e6035c0c335  81 7e 10 01 00 11 11 74 33 89 44 24 0c 8b 05 48
.~.....t3.D$...H
0x7e6035c0c345  75 20 00 85 c0 74 37 48 8d 0d e5 1f 00 00 48 8d  u
...t7H......H.
0x7e6035c0c355  15 3e 1f 00 00 be 09 03 00 00 48 8d 3d 2a 26 00
.>........H.=*&.

=================================================================
        Managed Stacktrace:
=================================================================
=================================================================
gmake[10]: *** [../../../build/library.make:335:
../../../class/lib/build-unix/Facades/System.Reflection.dll] Abort
trap (core dumped)
gmake[10]: *** Deleting file
'../../../class/lib/build-unix/Facades/System.Reflection.dll'
gmake[10]: Leaving directory
'/usr/pkgsrc/lang/mono6/work/mono-6.8.0.105/mcs/class/Facades/System.Reflection'
gmake[9]: *** [../../../build/rules.make:220: do-all] Error 2
....

Mono-6.6 - the previous build from 28th of January on the same machine
running -current of the time - works fine.



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