Opened 5 years ago

Closed 5 years ago

#1631 closed defect (fixed)

srfi-13 string-pad segfaults when arguments are not of the right type

Reported by: Kooda Owned by:
Priority: major Milestone: 5.2
Component: extensions Version:
Keywords: srfi-13 Cc:
Estimated difficulty:


This little piece of code causes a segfault (easy mistake to make, arguments order is reversed).

(import srfi-13)
(string-pad "coucou" #\space 10)

Change History (5)

comment:1 Changed 5 years ago by sjamaan

Milestone: someday5.2

comment:2 Changed 5 years ago by sjamaan

This is a bug in ##sys#check-exact. It will fail anywhere it's used. In core there's currently two places remaining that use it: pointer-vector-ref and pointer-vector-set!

(import (chicken memory))
(pointer-vector-ref (make-pointer-vector 2) #\space) ; segfault

Actually, I think all these uses are bogus: an exact complex number is not a valid index into a vector or string. So probably it's better to get rid of ##sys#check-exact altogether.

comment:3 Changed 5 years ago by sjamaan

I've fixed srfi-13 to use ##sys#check-fixnum but there are other eggs still using it:

  • sequences
  • object-evict
  • srfi-1
  • srfi-14
  • srfi-18
  • srfi-69
  • vector-lib

comment:4 Changed 5 years ago by sjamaan

I've updated the eggs now too. This ticket can be closed when core is patched to mark it as obsolete and remove uses in pointer-vector-ref/set!

comment:5 Changed 5 years ago by sjamaan

Resolution: fixed
Status: newclosed

Fixed with 29b3d6113985e2f110698d8ab7f398f51a88a819

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