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-rw-r--r--src/dump.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/dump.c b/src/dump.c
index 216701ba8..5173b88e5 100644
--- a/src/dump.c
+++ b/src/dump.c
@@ -1036,14 +1036,16 @@ sym_name_cvar_p(const char *name, mrb_int len)
static const char*
sym_operator_name(const char *sym_name, mrb_int len)
{
- mrb_sym start, idx;
mrb_sym table_size = sizeof(operator_table)/sizeof(struct operator_symbol);
+ if (operator_table[table_size-1].sym_name_len < len) return NULL;
+
+ mrb_sym start, idx;
int cmp;
const struct operator_symbol *op_sym;
for (start = 0; table_size != 0; table_size/=2) {
idx = start+table_size/2;
op_sym = &operator_table[idx];
- cmp = (int)(len-op_sym->sym_name_len);
+ cmp = (int)len-(int)op_sym->sym_name_len;
if (cmp == 0) {
cmp = memcmp(sym_name, op_sym->sym_name, len);
if (cmp == 0) return op_sym->name;