remove release_max_level_error feature

Signed-off-by: Jorge Prendes <jorge.prendes@gmail.com>

Author: jprendes

src/hyperlight-js-runtime/Cargo.toml

@@ -27,7 +27,7 @@ serde = { version = "1.0.228", default-features = false, features = ["derive", "
 serde_json = { version = "1.0.149", default-features = false, features = ["alloc"] }
 sha2 =  { version = "0.10" , default-features = false, features = ["force-soft"]}
 spin = "0.10"
-tracing = { version = "0.1.44", default-features = false, features = ["log","attributes","max_level_trace","release_max_level_error"] }
+tracing = { version = "0.1.44", default-features = false, features = ["log","attributes","max_level_trace"] }
 
 [target.'cfg(hyperlight)'.dependencies]
 hyperlight-common = { workspace = true, default-features = false }

src/hyperlight-js-runtime/tests/tracing_features.rs

@@ -0,0 +1,73 @@
+/*
+Copyright 2026  The Hyperlight Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+//! Test to verify that tracing features are configured correctly.
+//!
+//! This test ensures that `release_max_level_error` is NOT enabled for the
+//! tracing crate in hyperlight-js-runtime. Having this feature enabled would
+//! suppress all log levels above error in release builds, which prevents
+//! tracing from working correctly.
+//!
+//! See: https://github.com/hyperlight-dev/hyperlight-js/issues/126
+
+#![cfg(not(hyperlight))]
+
+/// Verifies that the `release_max_level_error` feature is not enabled for
+/// the tracing crate when building hyperlight-js-runtime.
+///
+/// This is important because enabling `release_max_level_error` would
+/// cause all trace/debug/info/warn log levels to be compiled out in
+/// release builds, breaking the tracing functionality.
+#[test]
+fn tracing_does_not_have_release_max_level_error() {
+    let mut cmd = std::process::Command::new(env!("CARGO"));
+    let output = cmd
+        .arg("tree")
+        .arg("-p")
+        .arg("hyperlight-js-runtime")
+        .arg("-f")
+        .arg("{f}")
+        .arg("-i")
+        .arg("tracing")
+        .arg("--depth")
+        .arg("0")
+        .env("RUSTFLAGS", "--cfg=hyperlight --check-cfg=cfg(hyperlight)")
+        .output()
+        .expect("Failed to run cargo hyperlight tree");
+
+    assert!(
+        output.status.success(),
+        "cargo hyperlight tree failed: {}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    let features: Vec<&str> = stdout.trim().split(',').collect();
+
+    assert!(
+        !features.contains(&"release_max_level_error"),
+        "tracing crate should NOT have 'release_max_level_error' feature enabled.\n\
+         Enabled features: {stdout}\n\
+         See: https://github.com/hyperlight-dev/hyperlight-js/issues/126"
+    );
+
+    // Also verify that the expected features ARE enabled
+    assert!(
+        features.contains(&"max_level_trace"),
+        "tracing crate should have 'max_level_trace' feature enabled.\n\
+         Enabled features: {stdout}"
+    );
+}