Update of bug #54151 (project screen):
Status: None => Invalid
Open/Closed: Open => Closed
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Follow-up Comment #1:
It's not a bug in screen.
It's normal behaviour on glibc systems, where it sanitizes environment for
suid applications.
You can check list of sanitized environment variables here:
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/generic/unsecvars.h;h=5ea8a4a259ef753c9d0d30aa4c0788e93656d047;hb=HEAD
I assume that your system has screen installed setuid that's why this variable
is cleared.
screen itself removes only few variables:
https://git.savannah.gnu.org/cgit/screen.git/tree/src/screen.c?id=c94fdfe9689d1c5dab54c69eb8bb60deed888e57#n1414
all related to its functionality and does copy the rest.
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