The value NIL is not of type SB-C::CBLOCK

[Paul F. Dietz]

(lambda ()
  (loop for lv3 below 0
        count (and (and t (or t (zerop (catch 'ct7 0))))
                   (> lv3 lv3))))

==>

The value
  NIL
is not of type
  SB-C::CBLOCK
   [Condition of type TYPE-ERROR]

Restarts:
 0: [RETRY] Retry SLIME REPL evaluation request.
 1: [*ABORT] Return to SLIME's top level.
 2: [ABORT] abort thread (#<THREAD tid=23173 "repl-thread" RUNNING {1000F80003}>)

Backtrace:
  0: (SB-C::REFS-UNCHANGED-P #<SB-C::REF :%SOURCE-NAME LV3 :LEAF #<SB-C::LAMBDA-VAR :%SOURCE-NAME LV3 :TYPE #<SB-KERNEL:NUMERIC-TYPE UNSIGNED-BYTE> :WHERE-FROM :DECLARED {100B6573E3}> {100BA54743}> #<SB-C:..
  1: (SB-C::SAME-LEAF-REF-P #<SB-C::LVAR 1 {100BA546F3}> #<SB-C::LVAR 2 {100BA547D3}>)
  2: ((SB-C:DEFTRANSFORM >) #<SB-C::COMBINATION :FUN #<SB-C::REF :LEAF #<SB-C::GLOBAL-VAR :%SOURCE-NAME > :TYPE #1=#<SB-KERNEL:FUN-TYPE #> :DEFINED-TYPE #1# :WHERE-FROM :DECLARED :KIND :GLOBAL-FUNCTION {1..
  3: (SB-C::IR1-OPTIMIZE-COMBINATION #<SB-C::COMBINATION :FUN #<SB-C::REF :LEAF #<SB-C::GLOBAL-VAR :%SOURCE-NAME > :TYPE #1=#<SB-KERNEL:FUN-TYPE #> :DEFINED-TYPE #1# :WHERE-FROM :DECLARED :KIND :GLOBAL-FU..
  4: (SB-C::IR1-OPTIMIZE #<SB-C:COMPONENT :NAME "<unknown>" :REANALYZE T {100BA56C63}> NIL)
  5: (SB-C::IR1-OPTIMIZE-UNTIL-DONE #<SB-C:COMPONENT :NAME "<unknown>" :REANALYZE T {100BA56C63}>)
  6: (SB-C::IR1-OPTIMIZE-PHASE-1 #<SB-C:COMPONENT :NAME "<unknown>" :REANALYZE T {100BA56C63}>)
  7: (SB-C::IR1-PHASES #<SB-C:COMPONENT :NAME "<unknown>" :REANALYZE T {100BA56C63}>)
  8: (SB-C::COMPILE-COMPONENT #<SB-C:COMPONENT :NAME "<unknown>" :REANALYZE T {100BA56C63}>)
  9: (SB-C::%COMPILE (LAMBDA NIL (LOOP FOR LV3 BELOW 0 COUNT ...)) NIL NIL)
[...]

x86-64, "2.4.1.206-cfe5c7b33"