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-rw-r--r--src/ninja.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/ninja.cc b/src/ninja.cc
index f4246d6..f9efc77 100644
--- a/src/ninja.cc
+++ b/src/ninja.cc
@@ -1184,6 +1184,7 @@ NORETURN void real_main(int argc, char** argv) {
BuildConfig config;
Options options = {};
options.input_file = "build.ninja";
+ options.dupe_edges_should_err = true;
setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
const char* ninja_command = argv[0];