From eda88b6dbdc5ca6a51d54f58740f0210e618beb7 Mon Sep 17 00:00:00 2001
From: Jarkko Hietaniemi <jhi@iki.fi>
Date: Thu, 9 Sep 1999 07:50:07 +0000
Subject: %#b in particular and %B in general were kaputt.

p4raw-id: //depot/cfgperl@4111
---
 sv.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'sv.c')

diff --git a/sv.c b/sv.c
index 956f3b961a..f6a793c40a 100644
--- a/sv.c
+++ b/sv.c
@@ -4959,6 +4959,7 @@ Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV
 	    base = 10;
 	    goto uns_integer;
 
+	case 'B':
 	case 'b':
 	    base = 2;
 	    goto uns_integer;
@@ -5033,8 +5034,10 @@ Perl_sv_vcatpvfn(pTHX_ SV *sv, const char *pat, STRLEN patlen, va_list *args, SV
 		    dig = uv & 1;
 		    *--eptr = '0' + dig;
 		} while (uv >>= 1);
-		if (alt && *eptr != '0')
-		    *--eptr = '0';
+		if (alt) {
+		    esignbuf[esignlen++] = '0';
+		    esignbuf[esignlen++] = c;  /* 'b' or 'B' */
+		}
 		break;
 	    default:		/* it had better be ten or less */
 		do {
-- 
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