So since [1671ba2d5c] the second regression (crash) is also covered now...

Everybody has now new test-facility "testpurebytesobj" allowing creation of pure bytes object without internal representations (NULL's).

Using this it's pretty simple to cover similar things, as well as to reproduce the crash, noticed by François (of course, only on branch before the Jan's fix [58c46e74b931d3a1]):

<code><pre style="padding-left:10pt">
load tcltest86 Tcltest
lrange [testpurebytesobj] 0 1