fix compiler crash for invalid enum

closes #1079
closes #1147

2 files changed, 16 insertions, 2 deletions

diff --git a/src/analyze.cpp b/src/analyze.cpp
index 479abef16a..5160a19e81 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -2318,8 +2318,9 @@ static void resolve_enum_zero_bits(CodeGen *g, TypeTableEntry *enum_type) {
         return;
 
     if (enum_type->data.enumeration.zero_bits_loop_flag) {
-        enum_type->data.enumeration.zero_bits_known = true;
-        enum_type->data.enumeration.zero_bits_loop_flag = false;
+        add_node_error(g, enum_type->data.enumeration.decl_node,
+            buf_sprintf("'%s' depends on itself", buf_ptr(&enum_type->name)));
+        enum_type->data.enumeration.is_invalid = true;
         return;
     }
 
diff --git a/test/compile_errors.zig b/test/compile_errors.zig
index 17896f9ab9..2247f0af96 100644
--- a/test/compile_errors.zig
+++ b/test/compile_errors.zig
@@ -2,6 +2,19 @@ const tests = @import("tests.zig");
 
 pub fn addCases(cases: *tests.CompileErrorContext) void {
     cases.add(
+        "enum field value references enum",
+        \\pub const Foo = extern enum {
+        \\    A = Foo.B,
+        \\    C = D,
+        \\};
+        \\export fn entry() void {
+        \\    var s: Foo = Foo.E;
+        \\}
+    ,
+        ".tmp_source.zig:1:17: error: 'Foo' depends on itself",
+    );
+
+    cases.add(
         "@floatToInt comptime safety",
         \\comptime {
         \\    _ = @floatToInt(i8, f32(-129.1));