diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 5220f261..546ea035 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -25,6 +25,7 @@ jobs:
           toolchain: ${{matrix.rust_channel}}
       - run: cargo xtask check
       - run: cargo xtask test
+      - run: cargo xtask test-release
 
   features:
     runs-on: ubuntu-latest
diff --git a/crates/rewrite/src/main.rs b/crates/rewrite/src/main.rs
index ae6eb2c5..849c9ad8 100644
--- a/crates/rewrite/src/main.rs
+++ b/crates/rewrite/src/main.rs
@@ -171,6 +171,10 @@ fn main() -> Result<()> {
     let in_data = unsafe { memmap2::Mmap::map(&in_file) }
         .with_context(|| format!("Failed to map input file '{}'", in_path.display()))?;
     let in_data = &*in_data;
+    match object::FileKind::parse(in_data) {
+        Ok(object::FileKind::Elf32) | Ok(object::FileKind::Elf64) => {}
+        _ => return Ok(()),
+    }
     let mut rewriter = rewrite::Rewriter::read(in_data)
         .with_context(|| format!("Failed to parse input file '{}'", in_path.display()))?;
 
@@ -350,7 +354,11 @@ fn main() -> Result<()> {
                 fs::remove_file(out_path).ok();
             }
         }
-        format!("Failed to write output file '{}'", out_path.display())
+        format!(
+            "Failed to write output file '{}' from input '{}'",
+            out_path.display(),
+            in_path.display()
+        )
     })?;
     Ok(())
 }
diff --git a/xtask/src/main.rs b/xtask/src/main.rs
index 19a56686..a5a4850c 100644
--- a/xtask/src/main.rs
+++ b/xtask/src/main.rs
@@ -34,8 +34,18 @@ type Task = (&'static str, fn() -> Result<(), DynError>, &'static str);
 const TASKS: &[Task] = &[
     ("ci", cmd_ci, "runs everything in CI"),
     ("check", cmd_check, "checks everything"),
-    ("build", cmd_build, "builds everything"),
-    ("test", cmd_test, "tests everything"),
+    ("build", cmd_build, "builds everything with dev profile"),
+    (
+        "build-release",
+        cmd_build_release,
+        "builds everything with release profile",
+    ),
+    ("test", cmd_test, "tests everything with dev profile"),
+    (
+        "test-release",
+        cmd_test_release,
+        "tests everything with release profile",
+    ),
     (
         "test-update",
         cmd_test_update,
@@ -83,10 +93,18 @@ fn cmd_build() -> Result<(), DynError> {
     cargo(&["build", "--workspace", "--features", "all"])
 }
 
+fn cmd_build_release() -> Result<(), DynError> {
+    cargo(&["build", "--workspace", "--features", "all", "--release"])
+}
+
 fn cmd_test() -> Result<(), DynError> {
     cargo(&["test", "--workspace", "--features", "all"])
 }
 
+fn cmd_test_release() -> Result<(), DynError> {
+    cargo(&["test", "--workspace", "--features", "all", "--release"])
+}
+
 fn cmd_test_update() -> Result<(), DynError> {
     cargo_with(&["test", "--workspace", "--features", "all"], |cmd| {
         cmd.env("OBJECT_TESTFILES_UPDATE", "1");