BUG: Here-doc delimiter: unclosed quotes

[Dastan Abdygali]

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: darwin19.6.0
Compiler: gcc
Compilation CFLAGS: -g -O2
uname output: Darwin lab1r2s10.42abudhabi.ae 19.6.0 Darwin Kernel Version
19.6.0: Thu Oct 29 22:56:45 PDT 2020; root:xnu-6153.$
Machine Type: x86_64-apple-darwin19.6.0

Bash Version: 5.2
Patch Level: 0
Release Status: release

Description:
        If unclosed single quotes or unclosed double quotes are used as a
delimiter in here-doc, bash lets the user finish the quote on
        the next lines. As a result delimiter contains \newline character.
Which even if pasted does not trigger the
        here-doc to be concluded.

Repeat-By:
        Just try the following command and try to execute:
        cat <<en'
        d'
        Hello World!
        en
        d

-- 
Dastan Abdygali
Phone.: +971 056 260 7155