main: make sure typecheck errors are correctly reported

errors_test.go

@@ -25,6 +25,7 @@ func TestErrors(t *testing.T) {
 		{name: "compiler"},
 		{name: "interp"},
 		{name: "invalidmain"},
+		{name: "invalidname"},
 		{name: "linker-flashoverflow", target: "cortex-m-qemu"},
 		{name: "linker-ramoverflow", target: "cortex-m-qemu"},
 		{name: "linker-undefined", target: "darwin/arm64"},

testdata/errors/invalidname.go

@@ -0,0 +1,6 @@
+package main
+
+import _ "github.com/tinygo-org/tinygo/testdata/errors/invalidname"
+
+// ERROR: # github.com/tinygo-org/tinygo/testdata/errors/invalidname
+// ERROR: invalidname{{[\\/]}}invalidname.go:3:9: invalid package name _

testdata/errors/invalidname/invalidname.go

@@ -0,0 +1,3 @@
+// some comment to move the 'package' line
+
+package _