fine

docker-compose.yml

@@ -30,6 +30,13 @@ services:
             - cargo-home:/usr/local/cargo
             - cargo-target:/app/server-rs/target
         environment:
+            # Disable incremental compilation. cargo-watch does incremental
+            # rebuilds over the mounted source; editing a struct with a generic
+            # serde impl mid-flight can corrupt the incremental cache and produce
+            # `rust-lld: undefined hidden symbol ...::serialize` link failures
+            # that never resolve until a clean rebuild. Off = slightly slower
+            # warm rebuilds, but no such corruption.
+            CARGO_INCREMENTAL: "0"
             # Fallback only: the binary uses jemalloc as its global allocator
             # (tuned via a baked-in malloc_conf). Caps glibc to 2 arenas.
             MALLOC_ARENA_MAX: "2"