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fix crash when compiling empty file

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closes #90
This commit is contained in:
Andrew Kelley
2016-01-27 12:06:47 -07:00
parent fa1ea6062b
commit fe0c6a3df9
2 changed files with 8 additions and 2 deletions
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7
src/errmsg.cpp
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@@ -80,9 +80,12 @@ ErrorMsg *err_msg_create_with_line(Buf *path, int line, int column,
int line_start_offset = line_offsets->at(line);
int end_line = line + 1;
int line_end_offset = (end_line >= line_offsets->length) ? buf_len(source) : line_offsets->at(line + 1);
int len = line_end_offset - line_start_offset - 1;
if (len < 0) {
len = 0;
}
buf_init_from_mem(&err_msg->line_buf, buf_ptr(source) + line_start_offset,
line_end_offset - line_start_offset - 1);
buf_init_from_mem(&err_msg->line_buf, buf_ptr(source) + line_start_offset, len);
return err_msg;
}