(inspect (make-array 5 :element-type nil)) hangs

[Michał "phoe" Herda]

SBCL 2.2.9 on debian amd64.

(inspect (make-array 5 :element-type nil)) hangs. Interrupting SBCL shows this backtrace:

debugger invoked on a SB-SYS:INTERACTIVE-INTERRUPT @52A1AA37 in thread
#<THREAD "main thread" RUNNING {1001348003}>:
  Interactive interrupt at #x52A1AA37.

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [CONTINUE] Return from SB-UNIX:SIGINT.
  1: [ABORT ] Exit debugger, returning to top level.

(SB-KERNEL:VECTOR-SUBSEQ* #<unavailable argument> #<unavailable argument> #<unavailable argument>)
0] backtrace

Backtrace for: #<SB-THREAD:THREAD "main thread" RUNNING {1001348003}>
0: (SB-KERNEL:VECTOR-SUBSEQ* #<unavailable argument> #<unavailable argument> #<unavailable argument>)
1: ((:METHOD SB-IMPL::INSPECTED-PARTS (VECTOR)) #<(SIMPLE-ARRAY NIL (5)) {100136065F}>) [fast-method]
2: ((LABELS SB-IMPL::REDISPLAY :IN SB-IMPL::%INSPECT))
3: (SB-IMPL::%INSPECT #<(SIMPLE-ARRAY NIL (5)) {100136065F}> #<SYNONYM-STREAM :SYMBOL SB-SYS:*STDOUT* {100000B533}>)
4: (SB-IMPL::INSPECTOR #<(SIMPLE-ARRAY NIL (5)) {100136065F}> #<unused argument> #<SYNONYM-STREAM :SYMBOL SB-SYS:*STDOUT* {100000B533}>)
5: (INSPECT #<(SIMPLE-ARRAY NIL (5)) {100136065F}>)
6: (SB-INT:SIMPLE-EVAL-IN-LEXENV (INSPECT (MAKE-ARRAY 5 :ELEMENT-TYPE NIL)) #<NULL-LEXENV>)
7: (EVAL (INSPECT (MAKE-ARRAY 5 :ELEMENT-TYPE NIL)))
8: (INTERACTIVE-EVAL (INSPECT (MAKE-ARRAY 5 :ELEMENT-TYPE NIL)) :EVAL NIL)
9: (SB-IMPL::REPL-FUN NIL)
10: ((LAMBDA NIL :IN SB-IMPL::TOPLEVEL-REPL))
11: (SB-IMPL::%WITH-REBOUND-IO-SYNTAX #<FUNCTION (LAMBDA NIL :IN SB-IMPL::TOPLEVEL-REPL) {100136057B}>)
12: (SB-IMPL::TOPLEVEL-REPL NIL)
13: (SB-IMPL::TOPLEVEL-INIT)
14: ((FLET SB-UNIX::BODY :IN SB-IMPL::START-LISP))
15: ((FLET "WITHOUT-INTERRUPTS-BODY-3" :IN SB-IMPL::START-LISP))
16: (SB-IMPL::%START-LISP)