gh-67877: Fix memory leaks in terminated RE matching #132783

Job	Run time
Change detection / Compute changed files	13s
Check if Autoconf files are up to date	19s
Check if generated files are up to date	3m 45s
Address sanitizer (ubuntu-24.04)	10m 0s
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.0.15)	2m 36s
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.1.7)	2m 30s
Windows MSI${{ '' }}	0s
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.2.3)	2m 41s
Hypothesis tests on Ubuntu	6m 12s
Ubuntu SSL tests with OpenSSL (ubuntu-24.04, 3.3.2)	2m 31s
CIFuzz (address)	20m 36s
CIFuzz (undefined)	20m 7s
CIFuzz (memory)	19m 57s
Thread sanitizer / Thread sanitizer	4m 34s
Thread sanitizer (free-threading) / Thread sanitizer	6m 50s
WASI / build and test	5m 41s
Windows / build (arm64)	3m 34s
Windows / build and test (Win32)	16m 22s
Windows (free-threading) / build (arm64)	3m 18s
Windows (free-threading) / build and test (Win32)	24m 51s
Windows / build and test (x64)	16m 2s
Windows (free-threading) / build and test (x64)	23m 28s
macOS (free-threading) / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	5m 21s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	5m 22s
macOS / build and test (macos-13)	13m 55s
Ubuntu / build and test (ubuntu-24.04)	7m 49s
Ubuntu (free-threading) / build and test (ubuntu-24.04)	12m 20s
Docs / Docs	2m 5s
Docs / Docs (Oldest Sphinx)	2m 14s
Docs / Doctest	18m 31s
All required checks pass	1s
	4h 23m 45s

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