From e9a4bcbcc6ac89c5526a6baaf2b0df49d0577eb4 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Thu, 29 Aug 2019 22:44:07 -0400
Subject: fix regressions

---
 src/analyze.cpp | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

(limited to 'src/analyze.cpp')

diff --git a/src/analyze.cpp b/src/analyze.cpp
index d1c79f9a1a..0bc42cc971 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -4174,8 +4174,14 @@ static void add_async_error_notes(CodeGen *g, ErrorMsg *msg, ZigFn *fn) {
     assert(fn->inferred_async_node != inferred_async_checking);
     assert(fn->inferred_async_node != inferred_async_none);
     if (fn->inferred_async_fn != nullptr) {
-        ErrorMsg *new_msg = add_error_note(g, msg, fn->inferred_async_node,
-            buf_sprintf("async function call here"));
+        ErrorMsg *new_msg;
+        if (fn->inferred_async_node->type == NodeTypeAwaitExpr) {
+            new_msg = add_error_note(g, msg, fn->inferred_async_node,
+                    buf_create_from_str("await here is a suspend point"));
+        } else {
+            new_msg = add_error_note(g, msg, fn->inferred_async_node,
+                buf_sprintf("async function call here"));
+        }
         return add_async_error_notes(g, new_msg, fn->inferred_async_fn);
     } else if (fn->inferred_async_node->type == NodeTypeFnProto) {
         add_error_note(g, msg, fn->inferred_async_node,
@@ -4185,7 +4191,7 @@ static void add_async_error_notes(CodeGen *g, ErrorMsg *msg, ZigFn *fn) {
             buf_sprintf("suspends here"));
     } else if (fn->inferred_async_node->type == NodeTypeAwaitExpr) {
         add_error_note(g, msg, fn->inferred_async_node,
-            buf_sprintf("await is a suspend point"));
+            buf_sprintf("await here is a suspend point"));
     } else if (fn->inferred_async_node->type == NodeTypeFnCallExpr &&
         fn->inferred_async_node->data.fn_call_expr.is_builtin)
     {
@@ -4240,6 +4246,16 @@ static Error analyze_callee_async(CodeGen *g, ZigFn *fn, ZigFn *callee, AstNode
             add_async_error_notes(g, msg, fn);
             return ErrorSemanticAnalyzeFail;
         }
+        if (fn->assumed_non_async != nullptr) {
+            ErrorMsg *msg = add_node_error(g, fn->proto_node,
+                buf_sprintf("unable to infer whether '%s' should be async",
+                    buf_ptr(&fn->symbol_name)));
+            add_error_note(g, msg, fn->assumed_non_async,
+                buf_sprintf("assumed to be non-async here"));
+            add_async_error_notes(g, msg, fn);
+            fn->anal_state = FnAnalStateInvalid;
+            return ErrorSemanticAnalyzeFail;
+        }
         return ErrorIsAsync;
     }
     return ErrorNone;
-- 
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