From b82d9200144692e9ddf1c35c0251f669cfbb2e71 Mon Sep 17 00:00:00 2001
From: Josh Davies <jodavies@users.noreply.github.com>
Date: Tue, 31 Mar 2026 13:08:55 +0100
Subject: [PATCH] fix: segfault after unrecognised moduleoption

---
 check/fixes.frm  | 7 +++++++
 sources/module.c | 1 +
 2 files changed, 8 insertions(+)

diff --git a/check/fixes.frm b/check/fixes.frm
index e3a22cd5..43acb3ca 100644
--- a/check/fixes.frm
+++ b/check/fixes.frm
@@ -4437,6 +4437,13 @@ assert result("testCF1") =~ expr("putfirst_(f,2,mu1)*putfirst_(e,2,mu1)*putfirst
 assert result("testCF2") =~ expr("d(mu2,mu1)*e(mu2,mu1)*f(mu2,mu1)")
 assert result("testCF3") =~ expr("d(mu2,mu1,mu3)*e(mu2,mu1,mu3)*f(mu2,mu1,mu3)")
 *--#] Issue750 :
+*--#[ Issue760 : 
+ModuleOption foo;
+ModuleOption parallel,foo;
+ModuleOption foo,parallel;
+.end
+assert preprocess_error?("Unrecognized module option: foo")
+*--#] Issue760 : 
 *--#[ Issue766 :
 * Unintended "&" in some warning messages
 CF f(s,s);
diff --git a/sources/module.c b/sources/module.c
index 86ec356d..9939091b 100644
--- a/sources/module.c
+++ b/sources/module.c
@@ -170,6 +170,7 @@ int CoModuleOption(UBYTE *s)
 			SKIPBLANKS(t)
 			if ( (option->func)(t) ) error = 1;
 		}
+		if ( error ) return(error);
 		if ( StrCmp((UBYTE *)(option->name),(UBYTE *)("polyfun")) == 0
 		 || StrCmp((UBYTE *)(option->name),(UBYTE *)("polyratfun")) == 0 ) {
 			polyflag = 1;