$\1 and serious bug in evalling

A bug report of several hours ago (that you cannot enter $\1 in
debugger with some combinations of mallocs and ReadLines) is fixed by
this:

p5p-msgid: 199707262127.RAA12883@monk.mps.ohio-state.edu

diff --git a/pp_ctl.c b/pp_ctl.c
index ccef138..df28463 100644 (file)
--- a/pp_ctl.c
+++ b/pp_ctl.c
@@ -2411,7 +2411,8 @@ PP(pp_entereval)
        save_lines(GvAV(compiling.cop_filegv), linestr);
     PUTBACK;
     ret = doeval(gimme);
-    if (perldb && was != sub_generation) { /* Some subs defined here. */
+    if (perldb && was != sub_generation /* Some subs defined here. */
+       && ret != op->op_next) {        /* Successive compilation. */
        strcpy(safestr, "_<(eval )");   /* Anything fake and short. */
     }
     return DOCATCH(ret);