Fix imports for when feature `memfile` is disabled.

Fortune for collect's current commit: Blessing − 吉

Cargo.toml

@@ -9,7 +9,7 @@ edition = "2021"
 default = ["jemalloc", "memfile", "logging", "tracing/release_max_level_warn"]
 
 # TODO: mmap, memfd_create() ver
-memfile = ["bitflags", "lazy_static"]
+memfile = ["bitflags", "lazy_static", "stackalloc"]
 
 # bytes: use `bytes` crate for collecting instead of `std::vec`
 
@@ -52,5 +52,5 @@ recolored = { version = "1.9.3", optional = true }
 memchr = "2.4.1"
 lazy_format = "1.10.0"
 bitflags = {version = "1.3.2", optional = true }
-stackalloc = "1.1.1"
+stackalloc = {version = "1.1.1", optional = true }
 lazy_static = { version = "1.4.0", optional = true }

src/main.rs

@@ -3,7 +3,9 @@
 #[cfg(feature="logging")] 
 #[macro_use] extern crate tracing;
 
+#[cfg(feature="memfile")] 
 #[macro_use] extern crate lazy_static;
+#[cfg(feature="memfile")] 
 #[macro_use] extern crate stackalloc;
 
 /// Run this statement only if `tracing` is enabled