GNU bash, version 5.0.16(1)-release (x86_64-pc-linux-gnu)
Operating System: Ubuntu 20.04 LTS
Kernel: Linux 5.4.0-33-generic
Architecture: x86-64
bash errexit shell option does not work in some cases.
after execution a command, exitcode is set to "1" but shell script does not
exited.
################# WORK CASE #######################
#!/bin/bash -e # errexit option
cat < not_exist.txt # not exist file
echo end ....
###### result ######
$ ./test.sh # work as expected
./test.sh: line 3: not_exist.txt: No such file or directory
################### NOT WORK CASES #######################
#!/bin/bash -e
{ cat ;} < not_exist.txt
echo "exitcode : $?"
echo end ....
###### result ######
$ ./test.sh
exitcode : 1 # exitcode is set to "1"
./test.sh: line 3: not_exist.txt: No such file or directory
end .... # but test.sh does not exited
--------------------------------------------------------------------------------------
#!/bin/bash -e
while read -r line; do
echo "$line"
done < not_exist.txt
echo "exitcode : $?"
echo end.....
###### result ######
$ ./test.sh
./test.sh: line 5: not_exist.txt: No such file or directory
exitcode : 1 # exitcode is set to "1"
end..... # but does not exited
