From 1d5f865cfafdaa96cac35ada9bb9e8b1a4e2bc36 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Tue, 19 Jul 2022 17:45:38 -0700
Subject: Sema: fix runtime instructions omitted

in the presence of comptime control flow.

fixes #12171
---
 src/Sema.zig | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/Sema.zig b/src/Sema.zig
index c64135f559..3c561821f4 100644
--- a/src/Sema.zig
+++ b/src/Sema.zig
@@ -4687,6 +4687,10 @@ fn resolveBlockBody(
             return sema.analyzeBlockBody(parent_block, src, child_block, merges);
         } else |err| switch (err) {
             error.ComptimeBreak => {
+                // Comptime control flow is happening, however child_block may still contain
+                // runtime instructions which need to be copied to the parent block.
+                try parent_block.instructions.appendSlice(sema.gpa, child_block.instructions.items);
+
                 const break_inst = sema.comptime_break_inst;
                 const break_data = sema.code.instructions.items(.data)[break_inst].@"break";
                 if (break_data.block_inst == body_inst) {
-- 
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