From 8731b3ebc39715005c402d746e282fe2edfa7118 Mon Sep 17 00:00:00 2001
From: tjg <tjg>
Date: Thu, 4 Oct 2001 12:32:43 +0000
Subject:   Bug: semantic errors in `fn prompt' no longer throw rc into a
 tailspin.

---
 input.c | 17 ++++++++++++++---
 rc.1    | 11 -----------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/input.c b/input.c
index 0f649e4..48c6a9c 100644
--- a/input.c
+++ b/input.c
@@ -242,9 +242,9 @@ extern void flushu() {
 
 extern Node *doit(bool clobberexecit) {
 	bool eof;
-	bool execit ;
+	bool execit;
 	Jbwrap j;
-	Estack e1, e2;
+	Estack e1;
 	Edata jerror;
 
 	if (dashen)
@@ -255,6 +255,7 @@ extern Node *doit(bool clobberexecit) {
 	except(eError, jerror, &e1);
 	for (eof = FALSE; !eof;) {
 		Edata block;
+		Estack e2;
 		block.b = newblock();
 		except(eArena, block, &e2);
 		sigchk();
@@ -270,7 +271,17 @@ extern Node *doit(bool clobberexecit) {
 			List *s;
 			if (!dashen && fnlookup("prompt") != NULL) {
 				static char *arglist[] = { "prompt", NULL };
-				funcall(arglist);
+				Estack e3;
+				Edata pjmp;
+				Jbwrap pj;
+				
+				if (sigsetjmp(pj.j, 1) == 0) {
+					pjmp.jb = &pj;
+					except(eError, pjmp, &e3);
+
+					funcall(arglist);
+					unexcept();
+				}
 			}
 			if ((s = varlookup("prompt")) != NULL) {
 #if EDITLINE || READLINE
diff --git a/rc.1 b/rc.1
index 2567266..7687215 100644
--- a/rc.1
+++ b/rc.1
@@ -1959,17 +1959,6 @@ code is illegal.
 .TP
 The redundant inner parentheses must be omitted.
 .PP
-Semantic errors (e.g. "bad concatenation") in
-.B fn prompt
-are not handled elegantly.  For example,
-.Ds
-.Cr "fn prompt { echo (a b)^(c d e) }"
-.De
-.TP
-throws
-.I rc
-into a tailspin.
-.PP
 Bug reports should be mailed to
 .Cr "<tjg@star.le.ac.uk>" .
 .SH INCOMPATIBILITIES
-- 
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