Check loading built-in binaries

Merged: https://github.com/ruby/ruby/pull/7473

builtin.c

@@ -48,6 +48,7 @@ rb_load_with_builtin_functions(const char *feature_name, const struct rb_builtin
     vm->builtin_function_table = table;
     vm->builtin_inline_index = 0;
     const rb_iseq_t *iseq = rb_iseq_ibf_load_bytes((const char *)bin, size);
+    ASSUME(iseq); // otherwise an exception should have raised
     vm->builtin_function_table = NULL;
 
     // exec

mini_builtin.c

@@ -21,6 +21,11 @@ builtin_iseq_load(const char *feature_name, const struct rb_builtin_function *ta
     rb_ast_t *ast = rb_builtin_ast(feature_name, &name_str);
     rb_vm_t *vm = GET_VM();
 
+    if (!ast) {
+        rb_fatal("builtin_iseq_load: can not find %s; "
+                 "probably miniprelude.c is out of date",
+                 feature_name);
+    }
     vm->builtin_function_table = table;
     vm->builtin_inline_index = 0;
     static const rb_compile_option_t optimization = {

template/builtin_binary.inc.tmpl

@@ -10,19 +10,19 @@ static const unsigned char <%= feature %>_bin[] = {
 %     iseq                   \
 %     . to_binary            \
 %     . each_byte            \
-%     . map(&:ord)           \
-%     . map{ '0x%02x' % _1 } \
 %     . each_slice(12) {|a|
-    <%= a.join(', ') %>,
+    <%= a.map{ '0x%02x,' % _1 }.join(' ') %>
 %     }
 };
 %   }
 
+#define BUILTIN_BIN(feature) \
+    { #feature, feature ## _bin, sizeof(feature ## _bin), }
 static const struct builtin_binary builtin_binary[] = {
 %   ary.each{|feature, |
-    { <%= feature.dump %>, <%= feature %>_bin, sizeof(<%= feature %>_bin), },
+    BUILTIN_BIN(<%= feature %>),
 %   }
-    { NULL, },<%# dummy entry %>
+    { NULL, },/* sentinel */
 };
 
 #define BUILTIN_BINARY_SIZE <%= ary.size %>

template/prelude.c.tmpl

@@ -140,8 +140,8 @@ static rb_ast_t *
 prelude_ast(VALUE name, VALUE code, int line)
 {
     rb_ast_t *ast = rb_parser_compile_string_path(rb_parser_new(), name, code, line);
-    if (!ast->body.root) {
-        rb_ast_dispose(ast);
+    if (!ast || !ast->body.root) {
+        if (ast) rb_ast_dispose(ast);
         rb_exc_raise(rb_errinfo());
     }
     return ast;
@@ -208,7 +208,7 @@ Init_<%=init_name%><%=%>(void)
 %unless @prelude_count.zero?
 % preludes.each do |i, prelude, lines, sub, start_line|
 %   next if sub
-    prelude_eval(PRELUDE_CODE(<%=i%><%=%>), PRELUDE_NAME(<%=i%><%=%>), <%=start_line%>);
+    prelude_eval(PRELUDE_CODE(<%=i%><%=%>), PRELUDE_NAME(<%=i%><%=%>), <%=start_line%><%=%>);
 % end
 
 #if 0