bug#43902: 28.0.50; Calc: Wrong eval precedence rules with LaTeX language

[Michael Heerdegen]

Hello,

here is a recipe for emacs -Q:

M-x calc RET
d L                     ;; calc-latex-language
 '                      ;; calc-algebraic-entry
1+1/2 RET

The result is 1, and the Trail shows alg' (1 + 1) / 2.  It does not make
much sense to me to use a precedence rule where addition has higher
precedence than division.  I know LaTeX a bit and don't expect such a
result, and it doesn't seem to be documented.  Is it intended or a bug?

TIA,

Michael.


In GNU Emacs 28.0.50 (build 62, x86_64-pc-linux-gnu, GTK+ Version 3.24.23, 
cairo version 1.16.0)
 of 2020-10-09 built on drachen
Repository revision: 6b346963d5a5bdb37cf3ecb50ce6d7dc6ec32d20
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux bullseye/sid