Minor fix

* src/lex.l (lex_new_source_0): Initialize yylloc early.  This makes
sure that eventual syntax errors occurring at the first token are
printed with detailed location (filename:line.start-end)

1 files changed, 9 insertions, 1 deletions

diff --git a/src/lex.l b/src/lex.l
index eb9a7f80..472a0108 100644
--- a/src/lex.l
+++ b/src/lex.l
@@ -172,6 +172,8 @@ inctx_pop()
 static int
 lex_new_source_0(const char *name)
 {
+	if (!yyin)
+		mu_locus_range_init (&yylloc);
 	if (ext_pp) {
 		yyin = pp_extrn_start(name, &pp_pid);
 		if (!yyin) {
@@ -190,7 +192,13 @@ lex_new_source_0(const char *name)
 		}
 	}
 	yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
-	MU_ASSERT (mu_linetrack_create (&trk, name, 2));
+	MU_ASSERT(mu_linetrack_create(&trk, name, 2));
+	mu_locus_point_set_file(&yylloc.beg, name);
+	yylloc.beg.mu_line = 1;
+	yylloc.beg.mu_col = 1;
+	mu_locus_point_copy(&yylloc.end, &yylloc.beg);
+	mu_stream_ioctl(mu_strerr, MU_IOCTL_LOGSTREAM,
+			MU_IOCTL_LOGSTREAM_SET_LOCUS_RANGE, &yylloc);
 	return EX_OK;
 }