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string.c: str_subseq propagate coderange when it is 7bit

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Any substring of a 7bit string will be 7bit.
This commit is contained in:
Jean Boussier committed 2026-04-07 10:15:35 +02:00
1 parent 4c659a9817
commit 42e0660be8
1 file changed
+11 -1
Notes: git 2026-04-07 08:16:05 +00:00 
Merged: https://github.com/ruby/ruby/pull/16671
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string.c
+11 -1
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@@ -3140,6 +3140,9 @@ str_subseq(VALUE str, long beg, long len)
const int termlen = TERM_LEN(str);
if (!SHARABLE_SUBSTRING_P(beg, len, RSTRING_LEN(str))) {
str2 = rb_enc_str_new(RSTRING_PTR(str) + beg, len, rb_str_enc_get(str));
if (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT) {
ENC_CODERANGE_SET(str2, ENC_CODERANGE_7BIT);
}
RB_GC_GUARD(str);
return str2;
}
@@ -3152,12 +3155,19 @@ str_subseq(VALUE str, long beg, long len)
TERM_FILL(ptr2+len, termlen);
STR_SET_LEN(str2, len);
if (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT) {
ENC_CODERANGE_SET(str2, ENC_CODERANGE_7BIT);
}
RB_GC_GUARD(str);
}
else {
str_replace_shared(str2, str);
RUBY_ASSERT(!STR_EMBED_P(str2));
ENC_CODERANGE_CLEAR(str2);
if (ENC_CODERANGE(str) != ENC_CODERANGE_7BIT) {
ENC_CODERANGE_CLEAR(str2);
}
RSTRING(str2)->as.heap.ptr += beg;
if (RSTRING_LEN(str2) > len) {
STR_SET_LEN(str2, len);