fix reading group sections

src/backend/mod.rs

@@ -103,7 +103,7 @@ pub(crate) trait Backend {
             .skip(1)
             .filter(|line| !line.starts_with('['))
             .fuse()
-            .map(Package::from)
+            .filter_map(Package::try_from)
             .collect()
     }
 

src/backend/pacman.rs

@@ -47,7 +47,7 @@ fn get_explicitly_installed_packages_from_alpm() -> HashSet<String> {
 }
 
 fn convert_to_pacdef_packages(packages: HashSet<String>) -> HashSet<Package> {
-    packages.into_iter().map(Package::from).collect()
+    packages.into_iter().filter_map(Package::try_from).collect()
 }
 
 impl Pacman {

src/backend/rust.rs

@@ -17,7 +17,7 @@ impl Backend for Rust {
 
     fn get_all_installed_packages(&self) -> HashSet<Package> {
         extract_packages_names(&run_cargo_install_list())
-            .map(Package::from)
+            .filter_map(Package::try_from)
             .collect()
     }