PerlIO_importFILE() should increase the reference count on the fd

that it brings into PerlIO managed space. (A long standing problem
reported by Steve Hay)

p4raw-id: //depot/perl@30610

diff --git a/perlio.c b/perlio.c
index 544b642..bba198c 100644 (file)
--- a/perlio.c
+++ b/perlio.c
@@ -2879,6 +2879,7 @@ PerlIO_importFILE(FILE *stdio, const char *mode)
        if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
            s = PerlIOSelf(f, PerlIOStdio);
            s->stdio = stdio;
+           PerlIOUnix_refcnt_inc(fileno(stdio));
        }
     }
     return f;