[Bug #20023] Resurrect fake string feature name before raising

load.c

@@ -935,7 +935,7 @@ load_unlock(rb_vm_t *vm, const char *ftptr, int done)
     }
 }
 
-static VALUE rb_require_string_internal(VALUE fname);
+static VALUE rb_require_string_internal(VALUE fname, bool resurrect);
 
 /*
  *  call-seq:
@@ -998,7 +998,7 @@ rb_f_require_relative(VALUE obj, VALUE fname)
         rb_loaderror("cannot infer basepath");
     }
     base = rb_file_dirname(base);
-    return rb_require_string_internal(rb_file_absolute_path(fname, base));
+    return rb_require_string_internal(rb_file_absolute_path(fname, base), false);
 }
 
 typedef int (*feature_func)(rb_vm_t *vm, const char *feature, const char *ext, int rb, int expanded, const char **fn);
@@ -1336,11 +1336,11 @@ ruby_require_internal(const char *fname, unsigned int len)
 VALUE
 rb_require_string(VALUE fname)
 {
-    return rb_require_string_internal(FilePathValue(fname));
+    return rb_require_string_internal(FilePathValue(fname), false);
 }
 
 static VALUE
-rb_require_string_internal(VALUE fname)
+rb_require_string_internal(VALUE fname, bool resurrect)
 {
     rb_execution_context_t *ec = GET_EC();
     int result = require_internal(ec, fname, 1, RTEST(ruby_verbose));
@@ -1349,6 +1349,7 @@ rb_require_string_internal(VALUE fname)
         EC_JUMP_TAG(ec, result);
     }
     if (result < 0) {
+        if (resurrect) fname = rb_str_resurrect(fname);
         load_failed(fname);
     }
 
@@ -1360,7 +1361,7 @@ rb_require(const char *fname)
 {
     struct RString fake;
     VALUE str = rb_setup_fake_str(&fake, fname, strlen(fname), 0);
-    return rb_require_string_internal(str);
+    return rb_require_string_internal(str, true);
 }
 
 static int