diff --git a/src/debug.cpp b/src/debug.cpp
index 406b247..b8af4dd 100644
--- a/src/debug.cpp
+++ b/src/debug.cpp
@@ -146,7 +146,11 @@
         size_t nc = __next_prime(2*static_cast<size_t>(__cend_ - __cbeg_) + 1);
         __c_node** cbeg = (__c_node**)calloc(nc, sizeof(void*));
         if (cbeg == nullptr)
+#ifndef _LIBCPP_NO_EXCEPTIONS
             throw bad_alloc();
+#else
+            abort();
+#endif
         for (__c_node** p = __cbeg_; p != __cend_; ++p)
         {
             __c_node* q = *p;
@@ -167,7 +171,11 @@
     __c_node* p = __cbeg_[hc];
     __c_node* r = __cbeg_[hc] = (__c_node*)malloc(sizeof(__c_node));
     if (__cbeg_[hc] == nullptr)
+#ifndef _LIBCPP_NO_EXCEPTIONS
         throw bad_alloc();
+#else
+        abort();
+#endif
     r->__c_ = __c;
     r->__next_ = p;
     ++__csz_;
@@ -402,7 +410,11 @@
             nc = 1;
         __i_node** beg = (__i_node**)malloc(nc * sizeof(__i_node*));
         if (beg == nullptr)
+#ifndef _LIBCPP_NO_EXCEPTIONS
             throw bad_alloc();
+#else
+            abort();
+#endif
         if (nc > 1)
             memcpy(beg, beg_, nc/2*sizeof(__i_node*));
         free(beg_);
@@ -424,7 +436,11 @@
         size_t nc = __next_prime(2*static_cast<size_t>(__iend_ - __ibeg_) + 1);
         __i_node** ibeg = (__i_node**)calloc(nc, sizeof(void*));
         if (ibeg == nullptr)
+#ifndef _LIBCPP_NO_EXCEPTIONS
             throw bad_alloc();
+#else
+            abort();
+#endif
         for (__i_node** p = __ibeg_; p != __iend_; ++p)
         {
             __i_node* q = *p;
@@ -445,7 +461,11 @@
     __i_node* p = __ibeg_[hi];
     __i_node* r = __ibeg_[hi] = (__i_node*)malloc(sizeof(__i_node));
     if (r == nullptr)
+#ifndef _LIBCPP_NO_EXCEPTIONS
         throw bad_alloc();
+#else
+        abort();
+#endif
     ::new(r) __i_node(__i, p, nullptr);
     ++__isz_;
     return r;