Don't install panic handler when RUST_BACKTRACE=1 (pantsbuild#5561)

amilnarski · Mar 7, 2018 · 5892fb3 · 5892fb3
1 parent e1cd9d4
commit 5892fb3
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/python/pants/engine/native.py b/src/python/pants/engine/native.py
@@ -729,4 +729,7 @@ def tc(constraint):
     return self.gc(scheduler, self.lib.scheduler_destroy)
 
   def set_panic_handler(self):
-    self.lib.set_panic_handler()
+    if os.getenv("RUST_BACKTRACE", "0") != "1":
+      # The panic handler hides a lot of rust tracing which may be useful.
+      # Don't activate it when the user explicitly asks for rust backtraces.
+      self.lib.set_panic_handler()