Public bug reported:
In this code:
```
# A bit of a hack..
my $di_path;
if (-d "/var/log/installer") {
$di_path="/var/log/installer/cdebconf";
} else {
$di_path="/var/log/debian-installer/cdebconf";
}
if (! -f "$di_path") {
print("Unable to find debconf database: $di_path\n");
exit(1);
}
Debconf::Db->load(readonly => "true");
$Debconf::Db::config=Debconf::Db->makedriver(
driver => "File",
name => "di_questions",
filename => "$di_path/questions.dat",
readonly => "true",
);
```
If `cdebconf` is a directory, the second `if` is true and the script
exits with "Unable to find debconf database". Yet the `makedriver`
instance(s) require `$di_path` to be set to a directory name (which
contains files such as `questions.dat`.
If `cdebconf` is a file then the `! -f` test passes and `makedriver`
tries to use a filename as a directory name and errors with a "could not
open" message.
If `cdebconf` doesn't exist, then the `-! -f` test does the right thing.
In each of those cases, the script is exited and the remainder never
runs.
To fix this issue, the test should be changed from `! -f` to `! -d`:
```
if (! -d "$di_path") {
print("Unable to find debconf database: $di_path\n");
exit(1);
}
```
As seen in Bionic and other releases.
```$ apt-cache policy installation-report
installation-report:
Installed: 2.62ubuntu1
```
** Affects: installation-report (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1848819
Title:
gen-preseed always errors
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