fatal error: runtime: cannot allocate memory

runtime stack:
runtime.throw({0x13647bd?, 0x46050f?})
	GOROOT/src/runtime/panic.go:1047 +0x5d fp=0xc000709f50 sp=0xc000709f20 pc=0x4371bd
runtime.persistentalloc1(0x130, 0x0?, 0x1feb970)
	GOROOT/src/runtime/malloc.go:1440 +0x24f fp=0xc000709f98 sp=0xc000709f50 pc=0x40e5af
runtime.persistentalloc.func1()
	GOROOT/src/runtime/malloc.go:1393 +0x2e fp=0xc000709fc8 sp=0xc000709f98 pc=0x40e32e
runtime.systemstack()
	src/runtime/asm_amd64.s:496 +0x49 fp=0xc000709fd0 sp=0xc000709fc8 pc=0x46b7a9