Rollup merge of rust-lang#74561 - RalfJung:backtrace, r=alexcrichton

Manishearth · web-flow · commit df8d169c31b5 · 2020-07-20T12:30:34.000-07:00
update backtrace-rs Hopefully fixes rust-lang#74484 r? @alexcrichton
diff --git a/src/backtrace b/src/backtrace
@@ -1 +1 @@
-Subproject commit 8f89434446f72f27f8145d8bbc1a302c6ef29d1e
+Subproject commit 5965cf5fc17affc84c11dc9972ae8f4dc2c32db1
