[piper] fix realloc bug

tstack · tstack · commit 8c89d937c274 · 2026-03-14T14:23:39.000-07:00
diff --git a/src/piper.looper.cc b/src/piper.looper.cc
@@ -322,7 +322,8 @@ arena_realloc(void* ctx, void* ptr, size_t sz)
         auto* header = (alloc_header*) (((char*) ptr) - sizeof(alloc_header));
         memcpy(&new_header->ah_bits, &header->ah_bits, header->ah_size);
     }
-    return &new_header->ah_size;
+    new_header->ah_size = sz;
+    return &new_header->ah_bits;
 }
 
 static void

Original file line number	Diff line number	Diff line change
`@@ -322,7 +322,8 @@ arena_realloc(void* ctx, void* ptr, size_t sz)`
`322`	`322`	`auto* header = (alloc_header) (((char) ptr) - sizeof(alloc_header));`
`323`	`323`	`memcpy(&new_header->ah_bits, &header->ah_bits, header->ah_size);`
`324`	`324`	`}`
`325`		`- return &new_header->ah_size;`
	`325`	`+ new_header->ah_size = sz;`
	`326`	`+ return &new_header->ah_bits;`
`326`	`327`	`}`
`327`	`328`
`328`	`329`	`static void`