Make String#{strip,lstrip}{,!} strip leading NUL bytes

The documentation already specifies that they strip whitespace
and defines whitespace to include null.

This wraps the new behavior in the appropriate guards in the specs,
but does not specify behavior for previous versions, because this
is a bug that could be backported.

Fixes [Bug #17467]

1 files changed, 2 insertions, 2 deletions

diff --git a/string.c b/string.c
index dbff149840..7605c225b9 100644
--- a/string.c
+++ b/string.c
@@ -9263,14 +9263,14 @@ lstrip_offset(VALUE str, const char *s, const char *e, rb_encoding *enc)
 
     /* remove spaces at head */
     if (single_byte_optimizable(str)) {
-	while (s < e && ascii_isspace(*s)) s++;
+        while (s < e && (*s == '\0' || ascii_isspace(*s))) s++;
     }
     else {
 	while (s < e) {
 	    int n;
 	    unsigned int cc = rb_enc_codepoint_len(s, e, &n, enc);
 
-	    if (!rb_isspace(cc)) break;
+            if (cc && !rb_isspace(cc)) break;
 	    s += n;
 	}
     }