Fix readline in list mode to tell rest of world that it has

things on the stack. Otherwise if perl code gets invoked
underneath it it scribbles over results-so-far.
(Why TIEHANDLE has not tripped on this is a mystery.)

p4raw-id: //depot/perlio@9351

diff --git a/pp_hot.c b/pp_hot.c
index 58874a8..7a6ad32 100644 (file)
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -1511,6 +1511,7 @@ Perl_do_readline(pTHX)
      || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
 
     for (;;) {
+       PUTBACK;
        if (!sv_gets(sv, fp, offset)
            && (type == OP_GLOB || SNARF_EOF(gimme, PL_rs, io, sv)))
        {
@@ -1531,6 +1532,7 @@ Perl_do_readline(pTHX)
            }
            if (gimme == G_SCALAR) {
                (void)SvOK_off(TARG);
+               SPAGAIN;
                PUSHTARG;
            }
            MAYBE_TAINT_LINE(io, sv);
@@ -1540,6 +1542,7 @@ Perl_do_readline(pTHX)
        IoLINES(io)++;
        IoFLAGS(io) |= IOf_NOLINE;
        SvSETMAGIC(sv);
+       SPAGAIN;
        XPUSHs(sv);
        if (type == OP_GLOB) {
            char *tmps;