bash-5.0: problem with variable scoping in posix-mode

[Alexander Tsoy]

Configuration Information:
Machine: x86_64
OS: linux-gnu
Compiler: x86_64-pc-linux-gnu-gcc
Compilation CFLAGS: -O0 -fno-omit-frame-pointer -ggdb -pipe -Wno-
parentheses -Wno-format-security
uname output: Linux gentoo-test 4.14.78-gentoo #1 SMP Wed Oct 24
20:06:13 MSK 2018 x86_64 Westmere E56xx/L56xx/X56xx (IBRS update)
GenuineIntel GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 5.0
Patch Level: 2
Release Status: release


Description:

There is a problem with variable scoping when variable is created from
assignment statement preceding function call in posix-mode. See an
example below.


Repeat-By:

$ cat test.sh 
#!/bin/sh

myecho() {
    echo $var
}

foo() {
    local var="foo: FAIL"
    var="foo: bar" myecho
}

foo

$ bash test.sh 
foo: bar
$ bash --posix test.sh 
foo: FAIL