Bad go build

gistfile1.txt

$ go build -v
$ go tool dist install -v
$ hg diff malloc.goc 
diff -r 4875dfefc730 src/pkg/runtime/malloc.goc
--- a/src/pkg/runtime/malloc.goc	Mon Apr 16 10:25:20 2012 -0700
+++ b/src/pkg/runtime/malloc.goc	Mon Apr 30 19:52:32 2012 -0400
@@ -25,7 +25,7 @@
 // Small objects are allocated from the per-thread cache's free lists.
 // Large objects (> 32 kB) are allocated straight from the heap.
 void*
-runtime·mallocgc(uintptr size, uint32 flag, int32 dogc, int32 zeroed)
+INVALIDruntime·mallocgc(uintptr size, uint32 flag, int32 dogc, int32 zeroed)
 {
 	int32 sizeclass, rate;
 	MCache *c;