Re: sbcl build host breakage

> (incf (nhash.count hash)) ; or some variant

that worked.  i'm not seeing the second issue any more, so
i guess it was related.

but.. now i'm getting an unhandled exception 11 even later
on in the build.

Unhandled exception 11 at 0x4043790, context->regs at #xf01353f8
Read operation to unmapped address 0x5d157e06
While executing: #<Function ENSURE-SVAR-IDX #x08025f06>
? for help
[1353] OpenMCL kernel debugger: :b
[1353] OpenMCL kernel debugger:

(#xF01358E0) #x00005E90 : (subprimitive _ret1valn)
(#xF01358F0) #x04043A58 : #<Function %ENSURE-SVAR #x0802607e> + 308
(#xF0135900) #x04043988 : #<Function %ENSURE-SVAR #x0802607e> + 100
(#xF0135910) #x04042FC0 : #<Function %SYM-VALUE #x080259f6> + 44
(#xF0135920) #x04042DCC : #<Function BOUNDP #x08025896> + 32
(#xF0135930) #x08691D30 : #<Function PROCESS-TYPE-DECL #x0869207e> + 188
(#xF0135940) #x0869A41C : #<Function PROCESS-1-DECL #x0869a5ee> + 728
(#xF0135950) #x00005E90 : (subprimitive _ret1valn)
(#xF0135960) #x08699E38 : #<Function PROCESS-DECLS #x08699ede> + 228
(#xF0135970) #x00005E90 : (subprimitive _ret1valn)
(#xF0135980) #x0869F6E8 : #<Function IR1-CONVERT-LAMBDA #x0869fefe> +  
436
(#xF0135990) #x08689FBC : #<Function MAKE-FUNCTIONAL-FROM-TOPLEVEL- 
LAMBDA #x0868
...

rcontext = 0x300F60
nargs = 4
r16 (fn) = #<Function ENSURE-SVAR-IDX #x08025f06>
r23 (arg_z) = 390422402
r22 (arg_y) = #<HASH-TABLE @#x0802bea6>
r21 (arg_x) = (*INTERRUPT-LEVEL*)
r20 (temp0) = #<1-element vector subtag = 2F @#x04000406 (CODE-VECTOR)>
r19 (temp1/next_method_context) = 0
r18 (temp2/nfn) = #<Function ENSURE-SVAR-IDX #x08025f06>
r17 (temp3/fname) = #<1-element vector subtag = 8A @#x0802be9e ()>
r31 (save0) = G1781
r30 (save1) = ()
r29 (save2) = ()
r28 (save3) = 390422402
r27 (save4) = MAKE-LEXENV
r26 (save5) = (INDEX G1781)
r25 (save6) = (#<(LAMBDA-VAR BASIC-VAR LEAF STRUCTURE!OBJECT)  
@#x096a9f96> #<(LAMBDA-VAR BASIC-VAR LEAF STRUCTURE!OBJECT)  
@#x096a9f46> #<(LAMBDA-VAR BASIC-VAR LEAF STRUCTURE!OBJECT)  
@#x096a9ef6>)
r24 (save7) = STRUCTURE-TYPEP