Re: `bytevector-length' doesn't accept a shared array from a bytevector

[Daniel Llorens]

On 21 Feb 2017, at 14:21, Diogo F. S. Ramos <address@hidden> wrote:

> I want to take the length of a shared array, but `bytevector-length'
> throws an error claiming the shared array isn't a bytevector, even
> though it prints the error argument as one.
> 
> --8<---------------cut here---------------start------------->8---
> scheme@(guile-user)> ,use (rnrs bytevectors)
> scheme@(guile-user)> (bytevector-length 
>                      (make-shared-array (make-bytevector 42)
>                                         list
>                                         7))
> ERROR: In procedure bytevector-length:
> ERROR: In procedure scm_c_bytevector_length: Wrong type argument in position 
> 1 (expecting bytevector): #vu8(0 0 0 0 0 0 0)
> 
> Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.
> scheme@(guile-user) [1]>
> --8<---------------cut here---------------end--------------->8---
> 
> I am using Guile 2.0.11, Debian Stable package 2.0.11+1-9.
> 

This is addressed in 2.1, by eb3d623da57e6d31a58d95f932345fb761f9b701. Your 
example will print #1vu8(0 0 ...) to signify that it's not a bytevector. You 
can use array-length here.

I suppose the patch could be applied to 2.0.