Issue with defer copying when triggered by break or continue.

releasenotes.md

@@ -47,6 +47,7 @@
 - `return (any)&foo` would not be reported as an escaping variable if `foo` was a pointer or slice.
 - Incorrect error message when providing too many associated values for enum #1934.
 - Allow function types to have a calling convention. #1938
+- Issue with defer copying when triggered by break or continue.
 
 ### Stdlib changes
 - Added '%h' and '%H' for printing out binary data in hexadecimal using the formatter.

src/compiler/copying.c

@@ -667,6 +667,7 @@ RETRY:
 			if (ast->contbreak_stmt.is_resolved)
 			{
 				fixup_astid(c, &ast->contbreak_stmt.ast);
+				MACRO_COPY_ASTID(ast->contbreak_stmt.defers);
 			}
 			break;
 		case AST_CASE_STMT:

test/test_suite/statements/defer_in_defer3.c3t

@@ -0,0 +1,46 @@
+// #target: macos-x64
+// #debuginfo: yes
+module test;
+extern fn void printf(char*,...);
+
+fn void test(int x)
+{
+	defer
+	{
+		do
+		{
+			defer {
+				x = 0;
+				printf("Hello\n");
+				defer x = 1;
+			}
+			if (x < 100) break;
+		};
+	}
+}
+
+fn int main()
+{
+	test(0);
+	return 0;
+}
+
+/* #expect: test.ll
+
+  %x = alloca i32, align 4
+  store i32 %0, ptr %x, align 4
+  %1 = load i32, ptr %x, align 4, !dbg !15
+  %lt = icmp slt i32 %1, 100, !dbg !15
+  br i1 %lt, label %if.then, label %if.exit, !dbg !15
+if.then:                                          ; preds = %entry
+  store i32 0, ptr %x, align 4, !dbg !19
+  call void (ptr, ...) @printf(ptr @.str), !dbg !21
+  store i32 1, ptr %x, align 4, !dbg !22
+  br label %loop.exit, !dbg !22
+if.exit:                                          ; preds = %entry
+  store i32 0, ptr %x, align 4, !dbg !24
+  call void (ptr, ...) @printf(ptr @.str.1), !dbg !26
+  store i32 1, ptr %x, align 4, !dbg !27
+  br label %loop.exit, !dbg !27
+loop.exit:                                        ; preds = %if.exit, %if.then
+  ret void, !dbg !27