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-rw-r--r--src/nvim/ops.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/nvim/ops.c b/src/nvim/ops.c
index af5f2fae34..3dcbe597fe 100644
--- a/src/nvim/ops.c
+++ b/src/nvim/ops.c
@@ -408,6 +408,7 @@ static void shift_block(oparg_T *oap, int amount)
memset(newp + bd.textcol + tabs, ' ', (size_t)spaces);
// Note that STRMOVE() copies the trailing NUL.
STRMOVE(newp + bd.textcol + tabs + spaces, bd.textstart);
+ assert(newlen - oldlen == (colnr_T)new_line_len - get_cursor_line_len());
} else { // left
char *verbatim_copy_end; // end of the part of the line which is
// copied verbatim
@@ -494,6 +495,7 @@ static void shift_block(oparg_T *oap, int amount)
memset(newp + verbatim_diff, ' ', fill);
// Note that STRMOVE() copies the trailing NUL.
STRMOVE(newp + verbatim_diff + fill, non_white);
+ assert(newlen - oldlen == (colnr_T)new_line_len - get_cursor_line_len());
}
// replace the line
ml_replace(curwin->w_cursor.lnum, newp, false);