classify another lockfile (generation) error

Author: Skgland

src/prepare.rs

@@ -165,6 +165,10 @@ fn run_command(cmd: Command) -> anyhow::Result<()> {
             || line.contains("error: invalid type: ")
             || line.contains("error: cyclic feature dependency: feature ")
             || line.contains("error: cyclic package dependency: package ")
+            || (line.contains("error: package collision in the lockfile: packages ")
+                && line.contains(
+                    " are different, but only one can be written to lockfile unambiguously",
+                ))
         {
             broken_deps = true;
         } else if line.contains("error: failed to parse lock file at")
@@ -409,7 +413,7 @@ pub enum PrepareError {
     /// Some of the dependencies do not exist anymore.
     #[error("the crate depends on missing dependencies: \n\n{0}")]
     MissingDependencies(String),
-    /// cargo rejected the lockfile
+    /// cargo rejected (generating) the lockfile
     #[error("the crate has a broken lockfile: \n\n{0}")]
     InvalidCargoLock(String),
     /// git clone/fetch failed, but repository didn't appear to be private