Auto merge of #7890 - ehuss:fingerprint-log-rustflags, r=Eh2406

Add new/old rustflags to fingerprint log. Follow up to #7888. Due to a conversation with someone I had with Discord who was having trouble determining why something was rebuilding.
2025-09-28 11:20:36 +00:00 · 2020-02-16 20:10:00 +00:00 · 2020-02-16 20:10:00 +00:00 · 5f07972103
commit 5f07972103
parent 1fa0f1b98f 25275b07bb
1 changed files with 5 additions and 1 deletions
--- a/src/cargo/core/compiler/fingerprint.rs
+++ b/src/cargo/core/compiler/fingerprint.rs
@ -653,7 +653,11 @@ impl Fingerprint {
            bail!("profile configuration has changed")
        }
        if self.rustflags != old.rustflags {
-            bail!("RUSTFLAGS has changed")
+            bail!(
+                "RUSTFLAGS has changed: {:?} != {:?}",
+                self.rustflags,
+                old.rustflags
+            )
        }
        if self.metadata != old.metadata {
            bail!("metadata changed")