merge revision(s) 75aaeb35b82da26359b9418d2963384d0c55839c: [Backport #20239]

[Bug #20239] Fix overflow at down-casting

regenc.c

@@ -57,7 +57,7 @@ onigenc_mbclen(const OnigUChar* p,const OnigUChar* e, OnigEncoding enc)
   int ret = ONIGENC_PRECISE_MBC_ENC_LEN(enc, p, e);
   if (ONIGENC_MBCLEN_CHARFOUND_P(ret)) {
     ret = ONIGENC_MBCLEN_CHARFOUND_LEN(ret);
-    if (ret > (int)(e - p)) ret = (int)(e - p); // just for case
+    if (p + ret > e) ret = (int)(e - p); // just for case
     return ret;
   }
   else if (ONIGENC_MBCLEN_NEEDMORE_P(ret)) {

regexec.c

@@ -3534,7 +3534,7 @@ match_at(regex_t* reg, const UChar* str, const UChar* end,
 	n = pend - pstart;
 	DATA_ENSURE(n);
 	sprev = s;
-	STRING_CMP_IC(case_fold_flag, pstart, &s, (int)n, end);
+	STRING_CMP_IC(case_fold_flag, pstart, &s, n, end);
 	while (sprev + (len = enclen_approx(encode, sprev, end)) < s)
 	  sprev += len;
 

version.h

@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 3
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 92
+#define RUBY_PATCHLEVEL 93
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"