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-rw-r--r--src/editfns.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/editfns.c b/src/editfns.c
index 6a9e2d80013..4a92eb8b6f2 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -1879,6 +1879,9 @@ Use %% to put a single % into the output.")
strings[i++] = XSTRING (args[n])->data;
}
+ /* Make room in result for all the non-%-codes in the control string. */
+ total += XSTRING (args[0])->size;
+
/* Format it in bigger and bigger buf's until it all fits. */
while (1)
{