fix assertion fail when using global var number literal

andrewrk · andrewrk · commit 44f38b04b0cc · 2018-01-31T11:13:39.000-05:00
closes #697
diff --git a/src/analyze.cpp b/src/analyze.cpp
@@ -3295,6 +3295,10 @@ static void resolve_decl_var(CodeGen *g, TldVar *tld_var) {
             is_const, init_val, &tld_var->base);
     tld_var->var->linkage = linkage;
 
+    if (implicit_type != nullptr && type_is_invalid(implicit_type)) {
+        tld_var->var->value->type = g->builtin_types.entry_invalid;
+    }
+
     if (var_decl->align_expr != nullptr) {
         if (!analyze_const_align(g, tld_var->base.parent_scope, var_decl->align_expr, &tld_var->var->align_bytes)) {
             tld_var->var->value->type = g->builtin_types.entry_invalid;
diff --git a/test/compile_errors.zig b/test/compile_errors.zig
@@ -1,6 +1,13 @@
 const tests = @import("tests.zig");
 
 pub fn addCases(cases: &tests.CompileErrorContext) void {
+    cases.add("use invalid number literal as array index",
+        \\var v = 25;
+        \\export fn entry() void {
+        \\    var arr: [v]u8 = undefined;
+        \\}
+    , ".tmp_source.zig:1:1: error: unable to infer variable type");
+
     cases.add("duplicate struct field",
         \\const Foo = struct {
         \\    Bar: i32,
