make target-pointer-width a u16 in compiletest

Author: WaffleLapkin

src/tools/compiletest/src/common.rs

@@ -6,6 +6,7 @@ use std::sync::OnceLock;
 use build_helper::git::GitConfig;
 use camino::{Utf8Path, Utf8PathBuf};
 use semver::Version;
+#[cfg(bootstrap)]
 use serde::de::{Deserialize, Deserializer, Error as _};
 
 use crate::executor::{ColorConfig, OutputFormat};
@@ -1064,7 +1065,8 @@ pub struct TargetCfg {
     pub(crate) abi: String,
     #[serde(rename = "target-family", default)]
     pub(crate) families: Vec<String>,
-    #[serde(rename = "target-pointer-width", deserialize_with = "serde_parse_u32")]
+    #[serde(rename = "target-pointer-width")]
+    #[cfg_attr(bootstrap, serde(deserialize_with = "serde_parse_u32"))]
     pub(crate) pointer_width: u32,
     #[serde(rename = "target-endian", default)]
     endian: Endian,
@@ -1172,6 +1174,7 @@ fn rustc_output(config: &Config, args: &[&str], envs: HashMap<String, String>) -
     String::from_utf8(output.stdout).unwrap()
 }
 
+#[cfg(bootstrap)]
 fn serde_parse_u32<'de, D: Deserializer<'de>>(deserializer: D) -> Result<u32, D::Error> {
     let string = String::deserialize(deserializer)?;
     string.parse().map_err(D::Error::custom)