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25 lines
544 B
Diff
25 lines
544 B
Diff
diff --git a/class.c b/class.c
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index c866d1d727..37ff3c5ade 100644
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--- a/class.c
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+++ b/class.c
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@@ -27,6 +27,7 @@
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#include "ruby/st.h"
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#include "constant.h"
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#include "vm_core.h"
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+#include "vm_debug.h"
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#include "id_table.h"
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#include <ctype.h>
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@@ -119,6 +120,12 @@ rb_class_foreach_subclass(VALUE klass, void (*f)(VALUE, VALUE), VALUE arg)
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while (cur) {
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VALUE curklass = cur->klass;
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cur = cur->next;
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+
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+ if (curklass == 0) {
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+ fprintf(stderr, "=== Detected NULL subclass:\n");
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+ dp(curklass);
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+ }
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+
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f(curklass, arg);
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}
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}
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