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-rw-r--r--src/backtrace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backtrace.c b/src/backtrace.c
index b581083df..44e9254a3 100644
--- a/src/backtrace.c
+++ b/src/backtrace.c
@@ -216,7 +216,7 @@ print_backtrace(mrb_state *mrb, mrb_value backtrace)
for (i = 0; i < n; i++) {
mrb_value entry = RARRAY_PTR(backtrace)[i];
- fprintf(stream, "\t[%d] %.*s\n", i, RSTRING_LEN(entry), RSTRING_PTR(entry));
+ fprintf(stream, "\t[%d] %.*s\n", i, (int)RSTRING_LEN(entry), RSTRING_PTR(entry));
}
}