Segmentation fault for a really long variable declaration statement with --via-ir

## Description

The compiler segfaults when trying to compile a really long tuple assignment with ```--via-ir```, tested with latest solc version ```0.8.25```. The attached program has 1750 variables in a single variable declaration statement but it doesn't have to be this number necessarily. I don't know if this is something that the team would want to investigate, but in any case I thought to open this issue.

[testcase.zip](https://github.com/ethereum/solidity/files/14894578/testcase.zip)

```
solc --asm --via-ir testcase.sol
```

## Environment

- Compiler version: ```0.8.25```

Reproduce the crash with testcase.zip using `solc --asm --via-ir testcase.sol` and compiler version 0.8.25. Compare the 1,750-variable tuple declaration with smaller declarations, then trace the --via-ir compilation path to locate the failure. Done means the testcase no longer segfaults and coverage exists for this long declaration.

Written by the indexing model from the issue text.