SBCL

With sb-c::*constraint-propagate* bound to NIL, call to CHAR causes compiler error

Bug #1765513 reported by Paul F. Dietz
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
SBCL
Invalid
Undecided
Unassigned

Bug Description

 (let ((sb-c::*constraint-propagate* nil)) (compile nil '(lambda (p1) (declare (type simple-string p1)) (char p1 0))))

==>

full call to SB-KERNEL:DATA-NIL-VECTOR-REF
[...]
  0: (SB-INT:BUG "full call to ~S" SB-KERNEL:DATA-NIL-VECTOR-REF)
  1: (SB-C::PONDER-FULL-CALL #<SB-C::COMBINATION :FUN #<SB-C::REF :LEAF #<SB-C::GLOBAL-VAR :%SOURCE-NAME SB-KERNEL:DATA-NIL-VECTOR-REF :TYPE #1=#<SB-KERNEL:FUN-TYPE #> :DEFINED-TYPE #1# :WHERE-FROM :DECLA..
  2: (SB-C::IR2-CONVERT-FULL-CALL #<SB-C::COMBINATION :FUN #<SB-C::REF :LEAF #<SB-C::GLOBAL-VAR :%SOURCE-NAME SB-KERNEL:DATA-NIL-VECTOR-REF :TYPE #1=#<SB-KERNEL:FUN-TYPE #> :DEFINED-TYPE #1# :WHERE-FROM :..
  3: (SB-C::IR2-CONVERT-BLOCK #<SB-C::CBLOCK 7 :START c1 {100632A4A3}>)
[...]

Revision history for this message
Stas Boukarev (stassats) wrote :

Ok, that's more interesting, but probably doesn't need fixing either. We are relying on constraint propagation there to choose the right types.

Changed in sbcl:
status: New → Invalid
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