Strange error involving 4611686018427387900

[Sod-Almighty]

Code:

(html5-parser:parse-html5 "Parse <a href=\"a.com\">some</a> HTML" :dom :xmls)

Result:

debugger invoked on a TYPE-ERROR in thread
#<THREAD "main thread" RUNNING {100293E923}>:
  The value
    0
  is not of type
    (OR NULL (INTEGER 1 4611686018427387900))

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

restarts (invokable by number or by possibly-abbreviated name):
  0: [ABORT] Reduce debugger level (to debug level 1).
  1:         Exit debugger, returning to top level.

(VECTOR-PUSH-EXTEND #\h "" 0) [tl,external]

Something is not right here.

[bakketun]

I'm not able to reproduce this error. Which version of SBCL are you using?

[Sod-Almighty]

SBCL 1.3.8