Fix bad deallocate for zero-length allocations in alloc.h (#118866)

kg · web-flow · commit 19b9833fccb8 · 2025-08-19T07:32:06.000-07:00
diff --git a/src/coreclr/jit/alloc.h b/src/coreclr/jit/alloc.h
@@ -316,6 +316,9 @@ class CompIAllocator : public IAllocator
     // Frees the block of memory pointed to by p.
     virtual void Free(void* p) override
     {
+        if (p == &m_zeroLenAllocTarg)
+            return;
+
         m_alloc.deallocate(p);
     }
 };

Original file line number	Diff line number	Diff line change
`@@ -316,6 +316,9 @@ class CompIAllocator : public IAllocator`
`316`	`316`	`// Frees the block of memory pointed to by p.`
`317`	`317`	`virtual void Free(void* p) override`
`318`	`318`	`{`
	`319`	`+ if (p == &m_zeroLenAllocTarg)`
	`320`	`+ return;`
	`321`	`+`
`319`	`322`	`m_alloc.deallocate(p);`
`320`	`323`	`}`
`321`	`324`	`};`