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-rw-r--r--src/base/fmt/do.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/base/fmt/do.c b/src/base/fmt/do.c
index 71b005e..3825fc8 100644
--- a/src/base/fmt/do.c
+++ b/src/base/fmt/do.c
@@ -212,7 +212,7 @@ copy(fmt·State *io, char *m, int sz, int n)
if(utf8·onebyte(r)){
nb=1;
m++;
- }else if((me-m) >= UTFmax || utf8·canfit(m, me-m)){
+ }else if((me-m) >= UTFmax || utf8·fullrune(m, me-m)){
nb=utf8·decode(m, &r);
m+=n;
}else