Go patch committed: Don't make GC symbol for invalid array type

Go patch committed: Don't make GC symbol for invalid array type

[Ian Lance Taylor]

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This patch by Chris Manghane changes the Go frontend to not make a GC
symbol for an invalid array type.  This avoids a compiler crash and
fixes https://golang.org/issue/11539 .  Bootstrapped and ran Go
testsuite on x86_64-unknown-linux-gnu.  Committed to mainline.

Ian

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Index: gcc/go/gofrontend/MERGE
===================================================================
--- gcc/go/gofrontend/MERGE	(revision 226795)
+++ gcc/go/gofrontend/MERGE	(working copy)
@@ -1,4 +1,4 @@
-55175f7ee0db2c1e68423216d7744be80071ed6c
+5fc38e74d132cd6f4e7b56e6bcf9fe57031ab203
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
Index: gcc/go/gofrontend/types.cc
===================================================================
--- gcc/go/gofrontend/types.cc	(revision 226510)
+++ gcc/go/gofrontend/types.cc	(working copy)
@@ -6423,7 +6423,10 @@ Array_type::array_gc_symbol(Gogo* gogo,
   unsigned long bound;
   if (!this->length_->numeric_constant_value(&nc)
       || nc.to_unsigned_long(&bound) == Numeric_constant::NC_UL_NOTINT)
-    go_assert(saw_errors());
+    {
+      go_assert(saw_errors());
+      return;
+    }
 
   Btype* pbtype = gogo->backend()->pointer_type(gogo->backend()->void_type());
   int64_t pwidth = gogo->backend()->type_size(pbtype);