diff --git a/semaphoreci.sh b/semaphoreci.sh
index 50c94948148d..a209005f86eb 100755
--- a/semaphoreci.sh
+++ b/semaphoreci.sh
@@ -19,8 +19,7 @@ export OS_NAME=linux
 export FULL_BUILD="${PULL_REQUEST_NUMBER+false}"
 # SemaphoreCI doesn't provide a convenient way to the base branch (e.g. master or stable)
 if [ -n "${PULL_REQUEST_NUMBER:-}" ]; then
-    # detect master/stable without querying the rate-limited API
-    BRANCH="$(git describe --all | sed -E "s/.*\/([^-/]*)-.*/\1/")"
+    BRANCH=$((curl -fsSL https://api.github.com/repos/dlang/dmd/pulls/$PULL_REQUEST_NUMBER || echo) | jq -r '.base.ref')
     # check if the detected branch actually exists and fallback to master
     if ! git ls-remote --exit-code --heads https://github.com/dlang/dmd.git "$BRANCH" > /dev/null ; then
         echo "Invalid branch detected: ${BRANCH} - falling back to master"
diff --git a/src/dmd/traits.d b/src/dmd/traits.d
index 60b483963748..e796a035ef6c 100644
--- a/src/dmd/traits.d
+++ b/src/dmd/traits.d
@@ -1006,7 +1006,7 @@ extern (C++) Expression semanticTraits(TraitsExp e, Scope* sc)
                 // if the parent is an interface declaration
                 // we must check for functions with the same signature
                 // in different inherited interfaces
-                if (sym.isInterfaceDeclaration())
+                if (sym && sym.isInterfaceDeclaration())
                     insertInterfaceInheritedFunction(fd, e);
                 else
                     exps.push(e);
diff --git a/test/compilable/traits.d b/test/compilable/traits.d
new file mode 100644
index 000000000000..5dc90fb716fc
--- /dev/null
+++ b/test/compilable/traits.d
@@ -0,0 +1,13 @@
+// This file is intended to contain all compilable traits-related tests in an
+// effort to keep the number of files in the `compilable` folder to a minimum.
+
+// https://issues.dlang.org/show_bug.cgi?id=19152
+
+class C19152
+{
+    int OnExecute()
+    {
+        auto name = __traits(getOverloads, this, "OnExecute").stringof;
+        return 0;
+    }
+}