feat: add existing indices if they don't contain pointer information

Author: Slartibartfass2

src/dataflow/environments/define.ts

@@ -50,6 +50,7 @@ function mergeDefinitions(existing: IdentifierDefinition[], definition: InGraphI
 	for(const overwriteIndex of overwriteIndices) {
 		for(const existingDef of existingDefs) {
 			if(existingDef.indicesCollection === undefined) {
+				newExistingDefs.push(existingDef);
 				continue;
 			}
 

test/functionality/slicing/pointer-analysis/container-single-index-based-access.test.ts

@@ -306,8 +306,6 @@ print(${acc('numbers', 1)})`,
 				`numbers <- foo()
 ${acc('numbers', 1)} <- 1
 print(${acc('numbers', 1)})`,
-				undefined,
-				'fail-both',
 			);
 
 			assertSliced(
@@ -322,8 +320,6 @@ print(numbers)`,
 ${acc('numbers', 1)} <- 1
 ${acc('numbers', 2)} <- 2
 print(numbers)`,
-				undefined,
-				'fail-both',
 			);
 		});