From 5e37ceaa4d5b043ecd1d60e68a960fe9a0d05a1c Mon Sep 17 00:00:00 2001
From: Florian Pfaff <6773539+FlorianPfaff@users.noreply.github.com>
Date: Tue, 14 Jul 2026 13:34:15 +0200
Subject: [PATCH 1/2] Reject non-real wrapped Laplace rates

---
 .../circle/wrapped_laplace_distribution.py         | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/pyrecest/distributions/circle/wrapped_laplace_distribution.py b/src/pyrecest/distributions/circle/wrapped_laplace_distribution.py
index dba7f71c7..9c3f56e4f 100644
--- a/src/pyrecest/distributions/circle/wrapped_laplace_distribution.py
+++ b/src/pyrecest/distributions/circle/wrapped_laplace_distribution.py
@@ -1,7 +1,8 @@
 # pylint: disable=no-name-in-module,no-member
 from numbers import Integral
 
-from pyrecest.backend import all, asarray, exp, isfinite, mod, ndim, pi
+import numpy as np
+from pyrecest.backend import all, asarray, exp, isfinite, mod, ndim, pi, to_numpy
 
 from .abstract_circular_distribution import AbstractCircularDistribution
 
@@ -10,9 +11,14 @@
 
 
 def _validate_positive_scalar(value, name):
-    value = asarray(value)
-    if value.shape not in ((), (1,)):
-        raise ValueError(f"{name} must be a positive scalar.")
+    message = f"{name} must be a positive real scalar."
+    try:
+        value = asarray(value)
+        numpy_value = np.asarray(to_numpy(value))
+    except (TypeError, ValueError, RuntimeError, OverflowError) as exc:
+        raise ValueError(message) from exc
+    if numpy_value.shape not in ((), (1,)) or numpy_value.dtype.kind not in "iuf":
+        raise ValueError(message)
     if not bool(all(isfinite(value))):
         raise ValueError(f"{name} must be finite.")
     if not bool(all(value > 0.0)):

From 7d9ebeaaaf62244071e16dacfa458f0aa9695344 Mon Sep 17 00:00:00 2001
From: Florian Pfaff <6773539+FlorianPfaff@users.noreply.github.com>
Date: Tue, 14 Jul 2026 13:34:24 +0200
Subject: [PATCH 2/2] Test wrapped Laplace rate validation

---
 .../test_wrapped_laplace_real_parameters.py     | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 tests/distributions/test_wrapped_laplace_real_parameters.py

diff --git a/tests/distributions/test_wrapped_laplace_real_parameters.py b/tests/distributions/test_wrapped_laplace_real_parameters.py
new file mode 100644
index 000000000..a0930dc47
--- /dev/null
+++ b/tests/distributions/test_wrapped_laplace_real_parameters.py
@@ -0,0 +1,17 @@
+import pytest
+
+from pyrecest.distributions.circle.wrapped_laplace_distribution import (
+    WrappedLaplaceDistribution,
+)
+
+
+@pytest.mark.parametrize("parameter_name", ["lambda_", "kappa_"])
+@pytest.mark.parametrize("invalid_value", [True, 1.0 + 1.0j])
+def test_wrapped_laplace_rejects_non_real_rate_parameters(
+    parameter_name, invalid_value
+):
+    parameters = {"lambda_": 2.0, "kappa_": 1.3}
+    parameters[parameter_name] = invalid_value
+
+    with pytest.raises(ValueError, match=parameter_name):
+        WrappedLaplaceDistribution(**parameters)