diff --git a/.cirrus.yml b/.cirrus.yml
index ad5e2901b..28ddf8309 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -20,7 +20,7 @@ environment:
     CCACHE_MAXSIZE: "2G"
 
 lint_task:
-  skip: $CIRRUS_CRON == '' && $CIRRUS_PR == ''
+  skip: $CIRRUS_PR == ''
   container:
     dockerfile: ci/Dockerfile
     cpu: 4
@@ -56,7 +56,7 @@ lint_task:
         path: build/ci
 
 clang17_ubuntu_debug_task:
-  skip: $CIRRUS_BRANCH != 'main' && $CIRRUS_TAG == ''
+  skip: $CIRRUS_TAG == ''
 
   container:
     dockerfile: ci/Dockerfile
diff --git a/CHANGES b/CHANGES
index 64a90861d..4b2829074 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,23 @@
+1.10.0-dev.103 | 2024-01-09 14:00:44 +0100
+
+  * Remove references to Cirrus cron task. (Benjamin Bannier, Corelight)
+
+    We do not schedule CI runs with cron anymore.
+
+  * Run CI ASAN task also for PRs. (Benjamin Bannier, Corelight)
+
+  * Skip tests around stack size on macos with ASAN. (Benjamin Bannier, Corelight)
+
+    These tests produce false positives on macos with ASAN which seem hard
+    to get rid of. Disable them on the smallest possible subset of setups.
+
+  * Fix ASAN false positives introduces with d332827aee7d70cdb642631d7a289751e1d8a36a. (Benjamin Bannier, Corelight)
+
+    Since the logging changes of d332827aee7d70cdb642631d7a289751e1d8a36a
+    ASAN reports false positives on e.g., macos-13.6.2 with its
+    clang-1500.0.40.1. This patch slightly reorganizes the code so these
+    false positiives are not triggered.
+
 1.10.0-dev.98 | 2024-01-09 13:55:27 +0100
 
   * Bump dependencies. (Benjamin Bannier, Corelight)
diff --git a/VERSION b/VERSION
index c4c108aa1..380ae78fa 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.10.0-dev.98
+1.10.0-dev.103
diff --git a/hilti/runtime/src/fiber.cc b/hilti/runtime/src/fiber.cc
index 38f5568b3..2e67bedb5 100644
--- a/hilti/runtime/src/fiber.cc
+++ b/hilti/runtime/src/fiber.cc
@@ -124,7 +124,12 @@ void __fiber_switch_trampoline(void* argsp) {
 
     auto from = args->from;
     auto to = args->to;
-    HILTI_RT_FIBER_DEBUG("stack-switcher", fmt("switching from %s to %s", *from, *to));
+    // Explicitly put the log message on the stack to work around ASAN false positives on macos.
+    if ( detail::unsafeGlobalState()->debug_logger &&
+         detail::unsafeGlobalState()->debug_logger->isEnabled(debug_stream_fibers) ) {
+        const auto msg = fmt("switching from %s to %s", from, to);
+        HILTI_RT_FIBER_DEBUG("stack-switcher", msg);
+    }
 
     if ( from->_type == detail::Fiber::Type::SharedStack )
         from->_stack_buffer.save();
@@ -351,8 +356,13 @@ void ASAN_NO_OPTIMIZE detail::Fiber::_finishSwitchFiber(const char* tag) {
     size_t prev_size = 0;
     __sanitizer_finish_switch_fiber(current->_asan.fake_stack, &prev_bottom, &prev_size);
 
-    HILTI_RT_FIBER_DEBUG(tag, fmt("asan-finish: prev-stack=%s/%zu fake-stack=%p", prev_bottom, prev_size,
-                                  current->_asan.fake_stack));
+    // Explicitly put the log message on the stack to work around ASAN false positives on macos.
+    if ( detail::unsafeGlobalState()->debug_logger &&
+         detail::unsafeGlobalState()->debug_logger->isEnabled(debug_stream_fibers) ) {
+        const auto msg =
+            fmt("asan-finish: prev-stack=%s/%zu fake-stack=%p", prev_bottom, prev_size, current->_asan.fake_stack);
+        HILTI_RT_FIBER_DEBUG(tag, msg);
+    }
 
     // By construction, the very first time this method is called, we must just
     // have finished switching over from the main fiber. Record its stack.
diff --git a/hilti/runtime/src/tests/fiber.cc b/hilti/runtime/src/tests/fiber.cc
index 328f1ace1..3174b22d6 100644
--- a/hilti/runtime/src/tests/fiber.cc
+++ b/hilti/runtime/src/tests/fiber.cc
@@ -324,8 +324,16 @@ static int fibo(int i) {
     return x;
 }
 
+bool isMacosAsan() {
+#if defined(HILTI_HAVE_ASAN) && defined(__APPLE__)
+    return true;
+#else
+    return false;
+#endif
+}
 
-TEST_CASE("stack-size-check") {
+// This test produces false positives on macos with ASAN.
+TEST_CASE("stack-size-check" * doctest::skip(isMacosAsan())) {
     hilti::rt::init();
 
     auto f = [&](hilti::rt::resumable::Handle* r) {
diff --git a/tests/Baseline/spicy.rt.stack-check/output b/tests/Baseline/spicy.rt.stack-check/output
index f2f6b5550..59c54f0e4 100644
--- a/tests/Baseline/spicy.rt.stack-check/output
+++ b/tests/Baseline/spicy.rt.stack-check/output
@@ -1,2 +1,2 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
-[error] terminating with uncaught exception of type hilti::rt::StackSizeExceeded: not enough stack space remaining (<...>/stack-check.spicy:18:5)
+[error] terminating with uncaught exception of type hilti::rt::StackSizeExceeded: not enough stack space remaining (<...>/stack-check.spicy:21:5)
diff --git a/tests/spicy/rt/stack-check.spicy b/tests/spicy/rt/stack-check.spicy
index 8b1715060..5554264d9 100644
--- a/tests/spicy/rt/stack-check.spicy
+++ b/tests/spicy/rt/stack-check.spicy
@@ -1,7 +1,10 @@
+# This test produces false positives on macos with ASAN.
+# @TEST-REQUIRES: ! sh ./isMacosAsan.sh
+#
 # @TEST-EXEC-FAIL: echo . | spicy-driver %INPUT >output 2>&1
 # @TEST-EXEC: btest-diff output
 #
-# Check that stack overflows are caught before we crash.
+# @TEST-DOC: Check that stack overflows are caught before we crash.
 
 module Foo;
 
@@ -23,3 +26,7 @@ function fibo(n: int64) : int64 {
 public type X = unit() {
     x: int8 { fibo(100000); }
 };
+
+# @TEST-START-FILE isMacosAsan.sh
+have-sanitizer && [[ "$OSTYPE" == "darwin"* ]]
+# @TEST-END-FILE