Adjust tor_assert_unreached()

This version of the macro makes it obvious to the compiler that
"tor_assert_unreached()" will always abort().

src/common/util_bug.h

@@ -102,7 +102,12 @@
   } STMT_END
 #endif /* defined(TOR_UNIT_TESTS) && defined(DISABLE_ASSERTS_IN_UNIT_TESTS) */
 
-#define tor_assert_unreached() tor_assert(0)
+#define tor_assert_unreached()                                  \
+  STMT_BEGIN {                                                  \
+    tor_assertion_failed_(SHORT_FILE__, __LINE__, __func__,     \
+                          "line should be unreached");          \
+    abort();                                                    \
+  } STMT_END
 
 /* Non-fatal bug assertions. The "unreached" variants mean "this line should
  * never be reached." The "once" variants mean "Don't log a warning more than

src/or/hs_common.c

@@ -523,7 +523,7 @@ rend_data_get_address(const rend_data_t *rend_data)
     return TO_REND_DATA_V2(rend_data)->onion_address;
   default:
     /* We should always have a supported version. */
-    tor_assert(0);
+    tor_assert_unreached();
   }
 }
 
@@ -546,7 +546,7 @@ rend_data_get_desc_id(const rend_data_t *rend_data, uint8_t replica,
     return TO_REND_DATA_V2(rend_data)->descriptor_id[replica];
   default:
     /* We should always have a supported version. */
-    tor_assert(0);
+    tor_assert_unreached();
   }
 }
 
@@ -569,7 +569,7 @@ rend_data_get_pk_digest(const rend_data_t *rend_data, size_t *len_out)
   }
   default:
     /* We should always have a supported version. */
-    tor_assert(0);
+    tor_assert_unreached();
   }
 }
 
@@ -1814,4 +1814,3 @@ hs_inc_rdv_stream_counter(origin_circuit_t *circ)
     tor_assert_nonfatal_unreached();
   }
 }
-