diff options
Diffstat (limited to 'src/join.c')
| -rw-r--r-- | src/join.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/join.c b/src/join.c index bf7e908af..ab7625183 100644 --- a/src/join.c +++ b/src/join.c @@ -648,13 +648,17 @@ join (FILE *fp1, FILE *fp2) autocount_2 = seq2.count ? seq2.lines[0]->nfields : 0; } - if (join_header_lines && seq1.count && seq2.count) + if (join_header_lines && (seq1.count || seq2.count)) { - prjoin (seq1.lines[0], seq2.lines[0]); + struct line const *hline1 = seq1.count ? seq1.lines[0] : &uni_blank; + struct line const *hline2 = seq2.count ? seq2.lines[0] : &uni_blank; + prjoin (hline1, hline2); prevline[0] = NULL; prevline[1] = NULL; - advance_seq (fp1, &seq1, true, 1); - advance_seq (fp2, &seq2, true, 2); + if (seq1.count) + advance_seq (fp1, &seq1, true, 1); + if (seq2.count) + advance_seq (fp2, &seq2, true, 2); } while (seq1.count && seq2.count) |