94af2ca06b
Prior to this commit, SpEL was able to recover from an error that occurred while running a CompiledExpression; however, SpEL was not able to recover from an error that occurred while compiling the expression (such as a java.lang.VerifyError). The latter can occur when multiple threads concurrently change types involved in the expression, such as the concrete type of a custom variable registered via EvaluationContext.setVariable(...), which can result in SpEL generating invalid bytecode. This commit addresses this issue by catching exceptions thrown while compiling an expression and updating the `failedAttempts` and `interpretedCount` counters accordingly. If an exception is caught while operating in SpelCompilerMode.IMMEDIATE mode, the exception will be propagated via a SpelEvaluationException with a new SpelMessage.EXCEPTION_COMPILING_EXPRESSION error category. Closes gh-28043
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