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-rw-r--r--build2/dump.cxx3
1 files changed, 3 insertions, 0 deletions
diff --git a/build2/dump.cxx b/build2/dump.cxx
index 7055a78..6d055ae 100644
--- a/build2/dump.cxx
+++ b/build2/dump.cxx
@@ -345,6 +345,9 @@ namespace build2
auto i (scopes.cbegin ());
assert (&i->second == global_scope);
+ // We don't lock diag_stream here as dump() is supposed to be called from
+ // the main thread prior to any other threads being spawned.
+ //
string ind;
ostream& os (*diag_stream);
dump_scope (os, ind, i);