test: Run unittests in debug mode

Running unittests in debug mode gives us greater correctness guarantees,
since `debug_assert!`s will be triggered. These are often used to
perform "sanity checks" that are supposed to get compiled out in release
mode for performance reasons. Additionally, our coverage test runs in
debug bug, so this will make the behavior between the two tests
consistent (whereas otherwise a failure of one but not the other due to
a debug assertion will be confusing).

Signed-off-by: Patrick Roy <roypat@amazon.co.uk>

Author: roypat

tests/integration_tests/build/test_unittests.py

@@ -3,6 +3,7 @@
 """A test that ensures that all unit tests pass at integration time."""
 
 import platform
+
 import pytest
 
 import host_tools.cargo_build as host  # pylint:disable=import-error
@@ -13,12 +14,13 @@
 # run coverage with the `gnu` toolchains and run unit tests with the `musl` toolchains.
 TARGET = "{}-unknown-linux-musl".format(MACHINE)
 
+
 @pytest.mark.timeout(600)
 def test_unittests(test_fc_session_root_path):
     """
     Run unit and doc tests for all supported targets.
     """
-    extra_args = "--release --target {} ".format(TARGET)
+    extra_args = "--target {} ".format(TARGET)
 
     host.cargo_test(test_fc_session_root_path, extra_args=extra_args)