abfa9a0e7d
Unfortunately, when checking the return/exit code using &&, ||, if,
while, etc., `set -e` is disabled for all nested functions as well,
which leads to incorrectly ignored errors, *sigh*.
Example:
```
set -eu
set -o pipefail
task() {
echo "task init"
echo "this should fail"
false
nonexistentcommand
echo "task end (we shouldn't be here)"
}
if ! task; then
echo >&2 "The task failed"
exit 1
else
echo "The task passed"
fi
```
```
$ bash test.sh
task init
this should fail
test.sh: line 10: nonexistentcommand: command not found
task end (we shouldn't be here)
The task passed
$ echo $?
0
```
But without the `if`, everything works "as expected":
```
set -eu
set -o pipefail
task() {
echo "task init"
echo "this should fail"
false
nonexistentcommand
echo "task end (we shouldn't be here)"
}
task
```
```
$ bash test.sh
task init
this should fail
$ echo $?
1
```
Wonderful.
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