Revert "[perl #62646] Maximum string length with substr"

This reverts commit b6d1426f94a845fb8fece8b6ad0b7d9f35f2d62e.

Conflicts:

	pp.c

2 files changed, 8 insertions, 26 deletions

diff --git a/pp.c b/pp.c
index 089401bdb6..2f4703bd20 100644
--- a/pp.c
+++ b/pp.c
@@ -3079,12 +3079,12 @@ PP(pp_substr)
 {
     dVAR; dSP; dTARGET;
     SV *sv;
-    IV len = 0;
+    I32 len = 0;
     STRLEN curlen;
     STRLEN utf8_curlen;
-    IV pos;
-    IV rem;
-    IV fail;
+    I32 pos;
+    I32 rem;
+    I32 fail;
     const I32 lvalue = PL_op->op_flags & OPf_MOD || LVRET;
     const char *tmps;
     const I32 arybase = CopARYBASE_get(PL_curcop);
@@ -3147,7 +3147,7 @@ PP(pp_substr)
 	    rem = curlen;
 	else if (len >= 0) {
 	    rem = pos+len;
-	    if (rem > (IV)curlen)
+	    if (rem > (I32)curlen)
 		rem = curlen;
 	}
 	else {
@@ -3167,11 +3167,8 @@ PP(pp_substr)
 	RETPUSHUNDEF;
     }
     else {
-	const IV upos = pos;
-	const IV urem = rem;
-	/* FIXME -- if an IV is longer than an I32, we're truncating here,
-         * but a 64-bit version of sv_pos_u2b is not (yet) available.
-         */
+	const I32 upos = pos;
+	const I32 urem = rem;
 	if (utf8_curlen)
 	    sv_pos_u2b(sv, (I32 *)&pos, (I32 *)&rem);
 	tmps += pos;
diff --git a/t/re/substr.t b/t/re/substr.t
index 49fd97bea7..c3fa6e10e7 100644
--- a/t/re/substr.t
+++ b/t/re/substr.t
@@ -24,7 +24,7 @@ $SIG{__WARN__} = sub {
 
 require './test.pl';
 
-plan(338);
+plan(334);
 
 run_tests() unless caller;
 
@@ -682,19 +682,4 @@ is($x, "\x{100}\x{200}\xFFb");
     is(substr($a,1,1), 'b');
 }
 
-# [perl #62646] offsets exceeding 32 bits on 64-bit system
-SKIP: {
-    skip("32-bit system", 4) unless ~0 > 0xffffffff;
-    my $a = "abc";
-    my $r;
-    $w = 0;
-    $r = substr($a, 0xffffffff, 1);
-    is($r, undef);
-    is($w, 1);
-    $w = 0;
-    $r = substr($a, 0xffffffff+1, 1);
-    is($r, undef);
-    is($w, 1);
-}
-
 }