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protect stream.

(syms_of_lread): Set up eval-buffer-list.
(Feval_buffer, Feval_region): Bind eval-buffer-list.

current buffer to read.  Callers changed.
When specified, narrow to this region only when reading,
not during eval.  Track next point to read from during eval.
Also restore point to "real" buffer position before eval.
(Feval_region): Don't save excursion and restriction here, and
don't narrow to region.  Just pass region to readevalloop.
Note: Point is now preserved even when PRINTFLAG is nil.

bool vectors.

warnings with Carbon Emacs because self-contained bundled Emacs
may be build without correct installation path.

arguemnt is in ASCII range.

(Fload): Don't check STRING_MULTIBYTE.

Recognize "[", ";", "#", and "?" after a dotted-pair dot.
Only recognize "," after dotted-pair dot if inside backquote.
Never include "`" or "," (inside backquote) in a symbol.
Allow dotted-pair dot after a character constant.
Allow "`" and "," (inside backquote) after a character constant.

for \s-X in a character constant which still is the super modifier.
(read1): Signal an `invalid read syntax' error if a character
constant is immediately followed by a digit or symbol character.

(Fload): Handle errors in Fsubstitute_in_file_name.
Don't expect Fsignal to return.