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-rw-r--r--mrbgems/mruby-bin-debugger/tools/mrdb/apilist.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mrbgems/mruby-bin-debugger/tools/mrdb/apilist.c b/mrbgems/mruby-bin-debugger/tools/mrdb/apilist.c
index 1c77d1ef8..33e9575bf 100644
--- a/mrbgems/mruby-bin-debugger/tools/mrdb/apilist.c
+++ b/mrbgems/mruby-bin-debugger/tools/mrdb/apilist.c
@@ -71,7 +71,7 @@ dirname(mrb_state *mrb, const char *path)
}
p = strrchr(path, '/');
- len = p != NULL ? p - path : strlen(path);
+ len = p != NULL ? (size_t)(p - path) : strlen(path);
dir = mrb_malloc(mrb, len + 1);
strncpy(dir, path, len);