(tclTomMath.h was broken) and non-final Tcl 8.6.

returns bool.  tkinter.BooleanVar now validates input values (accepted bool,
int, str, and Tcl_Obj).  tkinter.BooleanVar.get() now always returns bool.

arbitrary precision integers added in Tcl 8.5.

empty string or tuple argument.

On some platforms Tcl memory allocator returns NULL when allocating zero-sized
block of memory.

ckalloc() causes the Tcl interpreter to panic, attemptckalloc() returns NULL
if the memory allocation fails.

In particular this allows to initialize images from binary data.

the tkinter module on 64-bit platforms.

CID 1167595

Improved error handling in variables-related commands.

returned empty string.

64-bit pointer to long (32 bits).

argument.

This is needed for support Tcl/Tk 8.6.

in the tkinter module.

(issue #15721)

do with byte strings.

Added tests for Tcl.split() and Tcl.splitline().

a string argument contains non-BMP character.

a unicode argument contains non-BMP character.

Thanks to  Michael Driscoll

Patch by Serhiy Storchaka.

These functions are not documnted, so no documentation update.

Windows build is compiled with no-threaded tcl/tk by default

Patch by Guilherme Polo and Andrew Svetlov.