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-rw-r--r--src/pkg/runtime/panic.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/pkg/runtime/panic.c b/src/pkg/runtime/panic.c
index 2f553f417e..fbcf6a572d 100644
--- a/src/pkg/runtime/panic.c
+++ b/src/pkg/runtime/panic.c
@@ -5,6 +5,7 @@
#include "runtime.h"
#include "arch_GOARCH.h"
#include "stack.h"
+#include "malloc.h"
// Code related to defer, panic and recover.
@@ -383,7 +384,10 @@ nomatch:
void
runtime·startpanic(void)
{
- if(m->mcache == nil) // can happen if called from signal handler or throw
+ if(runtime·mheap == 0 || runtime·mheap->cachealloc.size == 0) { // very early
+ runtime·printf("runtime: panic before malloc heap initialized\n");
+ m->mallocing = 1; // tell rest of panic not to try to malloc
+ } else if(m->mcache == nil) // can happen if called from signal handler or throw
m->mcache = runtime·allocmcache();
if(m->dying) {
runtime·printf("panic during panic\n");