ICU update to 58 part 2

patches/regexcmp.patch

-diff --git a/source/i18n/regexcmp.cpp b/source/i18n/regexcmp.cpp
-index e518e84..d56dce3 100644
---- a/source/i18n/regexcmp.cpp
-+++ b/source/i18n/regexcmp.cpp
-@@ -71,6 +71,7 @@ RegexCompile::RegexCompile(RegexPattern *rxp, UErrorCode &status) :
-     fMatchOpenParen   = -1;
-     fMatchCloseParen  = -1;
-     fCaptureName      = NULL;
-+    fLastSetLiteral   = U_SENTINEL;
- 
-     if (U_SUCCESS(status) && U_FAILURE(rxp->fDeferredStatus)) {
-         status = rxp->fDeferredStatus;
-@@ -1752,12 +1753,14 @@ UBool RegexCompile::doParseActions(int32_t action)
-     case doSetNamedRange:
-         // We have scanned literal-\N{CHAR NAME}.  Add the range to the set.
-         // The left character is already in the set, and is saved in fLastSetLiteral.
-+        // Nonetheless, check if |fLastSetLiteral| is indeed set because it's
-+        // not set in some edge cases.
-         // The right side needs to be picked up, the scan is at the 'N'.
-         // Lower Limit > Upper limit being an error matches both Java
-         //        and ICU UnicodeSet behavior.
-         {
-             UChar32  c = scanNamedChar();
--            if (U_SUCCESS(*fStatus) && fLastSetLiteral > c) {
-+            if (U_SUCCESS(*fStatus) && (fLastSetLiteral == U_SENTINEL || fLastSetLiteral > c)) {
-                 error(U_REGEX_INVALID_RANGE);
-             }
-             UnicodeSet *s = (UnicodeSet *)fSetStack.peek();
-@@ -1822,11 +1825,13 @@ UBool RegexCompile::doParseActions(int32_t action)
-     case doSetRange:
-         // We have scanned literal-literal.  Add the range to the set.
-         // The left character is already in the set, and is saved in fLastSetLiteral.
-+        // Nonetheless, check if |fLastSetLiteral| is indeed set because it's
-+        // not set in some edge cases.
-         // The right side is the current character.
-         // Lower Limit > Upper limit being an error matches both Java
-         //        and ICU UnicodeSet behavior.
-         {
--        if (fLastSetLiteral > fC.fChar) {
-+        if (fLastSetLiteral == U_SENTINEL || fLastSetLiteral > fC.fChar) {
-             error(U_REGEX_INVALID_RANGE);
-         }
-         UnicodeSet *s = (UnicodeSet *)fSetStack.peek();