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Unverified Commit 0de65a88 authored by ksss's avatar ksss
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Do nothing when empty string 

Fix #3361
parent 5e3077c0
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src/string.c
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...@@ -754,6 +754,9 @@ mrb_str_concat(mrb_state *mrb, mrb_value self, mrb_value other) ...@@ -754,6 +754,9 @@ mrb_str_concat(mrb_state *mrb, mrb_value self, mrb_value other)
other = mrb_str_to_str(mrb, other); other = mrb_str_to_str(mrb, other);
} }
s2 = mrb_str_ptr(other); s2 = mrb_str_ptr(other);
if (RSTR_LEN(s2) == 0) {
return;
}
len = RSTR_LEN(s1) + RSTR_LEN(s2); len = RSTR_LEN(s1) + RSTR_LEN(s2);
if (RSTRING_CAPA(self) < len) { if (RSTRING_CAPA(self) < len) {
......
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