feat: Use _pv destroy functions to satisfy UBSAN checks

Author: krlmlr

src/rinterface.c

@@ -24,6 +24,20 @@
 
 #include "rinterface.h"
 
+// This is a variant of IGRAPH_FINALLY that satisfies UBSAN checks.
+#define IGRAPH_FINALLY_PV(func, ptr) \
+    do { \
+        /* the following branch makes the compiler check the compatibility of \
+         * func and ptr to detect cases when we are accidentally invoking an \
+         * incorrect destructor function with the pointer */ \
+        if (0) { func(ptr); } \
+        IGRAPH_FINALLY_REAL((igraph_finally_func_t*)(func##_pv), (ptr)); \
+    } while (0)
+
+void igraph_vector_int_destroy_pv(void* pv_ptr) {
+  igraph_vector_int_destroy((igraph_vector_int_t*) pv_ptr);
+}
+
 /***********************************************/
 /* THE REST IS GENERATED BY stimulus           */
 /***********************************************/
@@ -11272,7 +11286,7 @@ SEXP R_igraph_eulerian_cycle(SEXP graph) {
   if (0 != igraph_vector_int_init(&c_vertex_res, 0)) {
     igraph_error("", __FILE__, __LINE__, IGRAPH_ENOMEM);
   }
-  IGRAPH_FINALLY(igraph_vector_int_destroy, &c_vertex_res);
+  IGRAPH_FINALLY_PV(igraph_vector_int_destroy, &c_vertex_res);
                                         /* Call igraph */
   IGRAPH_R_CHECK(igraph_eulerian_cycle(&c_graph, &c_edge_res, &c_vertex_res));