(read_process_output): Fix the arg FROM to

update_compositions.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/process.c b/src/process.c
index de2bae34ad0..04095b9179f 100644
--- a/src/process.c
+++ b/src/process.c
@@ -3182,7 +3182,7 @@ read_process_output (proc, channel)
         {
           insert_1_both (chars, nchars, nbytes, 0, 1, 1);
           signal_after_change (opoint, 0, PT - opoint);
-          update_compositions (opoint, PT, CHECK_BORDER);
+          update_compositions (before, PT, CHECK_BORDER);
         }
       set_marker_both (p->mark, p->buffer, PT, PT_BYTE);