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    my $bar = baz();
    if ($@) {
        die "baz failed!\n";
    }

    my $bar = baz();
    if ($@) {
        die "baz failed: $@\n";
    }   #              ^^^^

#!/usr/bin/perl
use strict;
...
sub settle {
    # ...
}

Deal failed: Can't make a deal: No collateral

Use of uninitialized value in unlink at - line 7.
    (in cleanup) Failed to free resources: No such file or directory
Deal failed: Can't make a deal: No collateral