Standalone test for upstream laurikari#101.

tests/Makefile.am

@@ -3,7 +3,7 @@ AUTOMAKE_OPTIONS = subdir-objects
 
 SUBDIRS = agrep
 
-check_PROGRAMS = retest randtest test-str-source
+check_PROGRAMS = retest randtest test-str-source bore
 EXTRA_PROGRAMS = bench
 LDADD = $(LTLIBINTL)
 
@@ -68,3 +68,7 @@ TESTS = test-str-source retest
 if TRE_MULTIBYTE
 TESTS += wretest
 endif TRE_MULTIBYTE
+
+bore_SOURCES = bore.c
+bore_CPPFLAGS = $(retest_CPPFLAGS)
+bore_LDADD = $(retest_LDADD)

tests/bore.c

@@ -0,0 +1,19 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <regex.h>
+
+int main(void)
+{
+	regmatch_t match[1];
+	regex_t reg;
+
+	if (regcomp(&reg, "^|$", REG_EXTENDED) != 0 ||
+	    regexec(&reg, "", 1, match, REG_NOTBOL) != 0 ||
+	    match[0].rm_so != 0 || match[0].rm_eo != 0)
+	  return 1;
+	regfree(&reg);
+	return 0;
+}
+