Subject: bug#70236: Truncating only happening on 900 character long lines in *compilation* buffer

From: Phil Sainty <[email-masked]>
Date: Sun, 07 Apr 2024 13:31:28 +1200

This will generate the same output as that perl:

(cl-loop for n from 100 to 1500 by 100 do
          (insert (number-to-string n)
                  " [\"" (make-string n (string-to-char
                                           (format "%X" (/ n 100))))
                  "\"]\n\n"))

If you write that to a file "test" in some temp dir and have
a Makefile like this:

foo:
	cat test

Then the suggested command will demonstrate the issue:

emacs -Q -f compile

What you're looking at is the difference between the "900" line
(which gets truncated) and all the other lines (which do not).

compilation-max-output-line-length is 400