Add notes for triage meeting 2019-04-18

Author: wesleywiser

minutes/triage-meeting/2019-04-18.md

@@ -0,0 +1,38 @@
+# 2019-04-18
+
+## Volunteers wanted
+
+- No issues discussed this week.
+
+## Backport decisions
+
+- There were no beta backport nominations this week.
+
+- "Use informational target machine for metadata" ([#58605](https://github.com/rust-lang/rust/pulls/58605)) was nominated for backport to stable.
+  - [Nomination was declined](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202019-04-18.20.2354818/near/163655391)
+
+## Working group sync
+
+### [wg-llvm](https://github.com/rust-lang/compiler-team/blob/master/working-groups/llvm/README.md)
+
+- `wg-llvm` is working on optimizing `overflow` intrinsics with `add` and `sub` instructions.
+
+- A PR ([#59546](https://github.com/rust-lang/rust/pull/59546)) has also been opened to fix [a long standing unsoundness issue](https://github.com/rust-lang/rust/issues/28728).
+The PR is currently waiting for someone to run lolbench.rs to determine what impact the PR has on generated code performance.
+
+[Link to full discussion](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202019-04-18.20.2354818/near/163658733)
+
+### [wg-async-await](https://github.com/rust-lang/compiler-team/blob/master/working-groups/async-await/README.md)
+
+- `wg-async-await` is currently working though the list of [issues blocking stabilization](https://github.com/rust-lang/rust/labels/AsyncAwait-Blocking).
+  - This includes:
+    - [Async-await syntax](https://github.com/rust-lang/rust/issues/60016)
+    - [Supporting async fns whose arguments have multiple lifetimes](https://github.com/rust-lang/rust/issues/56238)
+    - [Shrinking the size of generators](https://github.com/rust-lang/rust/issues/52924)
+
+- The thorniest issue remaining is determining the drop order for unused async function arguments ([#54716](https://github.com/rust-lang/rust/issues/54716))
+  - While investigating this issue, some subtle inconsistencies regarding existing drop order for regular functions were discovered.
+  - This issue is also not proving to be easy to resolve.
+  
+[Link to full discussion](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/weekly.20meeting.202019-04-18.20.2354818/near/163658872)
+