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--- src/gsmalloc.c.orig 2015-07-24 09:55:54.032137000 +0900
+++ src/gsmalloc.c 2015-07-24 09:57:15.070246000 +0900
@@ -170,7 +170,7 @@
} else {
uint added = size + sizeof(gs_malloc_block_t);
- if (mmem->limit - added < mmem->used)
+ if (added <= size || mmem->limit - added < mmem->used)
set_msg("exceeded limit");
else if ((ptr = (byte *) malloc(added)) == 0)
set_msg("failed");
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