[Sbcl-devel] bug in room when there is a large vector (Was: bug when exceeding heap space)

[Sidney M. <si...@si...>]

Sidney Markowitz wrote, On 22/11/07 3:02 PM:
> I narrowed down the place where the error happens.
> 
> sb-vm::map-allocated-objects has a let* that conditionally sets a
> variable 'size' to  (vector-total-size obj info), where size is declared
> as fixnum and the comments for vector-total-size say that it returns the
> total size of a vector in bytes including any pad.

As an FYI, looking over the code is appears that there are a number of
places in that file that assume a fixnum that will break if a vector of
more than a fixnum number of bytes is encountered. For example,
vector-total-size-info calls round-to-dual-word which declares its
argument to be fixnum. I think that the code in the file needs to have
every declaration of fixnum checked, and then someone needs to think
through the implications of things there now being possibly bignums.

 -- Sidney Markowitz
    http://www.sidney.com