Add reproducer for PHP 8.5 JIT bug affecting Composer

Dockerfile

@@ -0,0 +1,10 @@
+FROM php:latest
+
+RUN apt-get update && apt-get install -y unzip git moreutils && rm -rf /var/lib/apt/lists/*
+RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+
+RUN useradd --home-dir /opt/pipeline --shell /bin/bash pipeline
+RUN mkdir -p /opt/pipeline/.composer && chown -R pipeline:pipeline /opt/pipeline
+
+USER pipeline
+WORKDIR /app

doit2.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+chronic docker build -t pipeline-test .
+
+mkdir -p .composer-cache
+
+docker run --rm \
+    -v "$PWD:/app" \
+    -v "$PWD/.composer-cache:/opt/pipeline/.composer" \
+    pipeline-test \
+    sh -c '
+        chronic composer remove --no-update --dev phpstan/phpstan vimeo/psalm infection/infection friendsofphp/php-cs-fixer php-coveralls/php-coveralls
+        for n in $(seq 1 10); do
+            chronic php -d opcache.enable_cli=1 -d opcache.jit=tracing -d opcache.jit_buffer_size=64M /usr/local/bin/composer update --prefer-dist --no-interaction --no-progress --dry-run -vvv || { echo "FAILED on run $n"; exit 1; }
+            echo "OK ($n)"
+        done
+        echo "All 10 runs succeeded"
+    '