LowFile-scopeRuby Plug & play

Avoid Rescuing the `Exception` Class

Identify `rescue Exception` statements and suggest replacing them with `rescue StandardError` to avoid catching critical system exceptions.

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Why this matters

Rescuing `Exception` captures critical system-level errors like `NoMemoryError`, preventing proper application termination and potentially masking serious issues.

Bad vs. good

Side-by-side examples engineers can pattern-match during review.

Avoid

begin
  risky_operation
rescue Exception
  puts "An error occurred"
end

Prefer

begin
  risky_operation
rescue StandardError => error
  puts "An error occurred: #{error.message}"
end

More snippets

Bad

begin
  risky_operation
rescue Exception
  puts "An error occurred"
end

Good

begin
  risky_operation
rescue StandardError => error
  puts "An error occurred: #{error.message}"
end

Related rules

From the same buckets as this rule.

Critical
Avoid equality operators in loop termination conditions
Check if loops use equality operators (== or !=) in termination conditions. These can lead to infinite loops if the condition is never met exactly. Instead, use relational operators like < or > for safer loop termination.
error-handlingreadability-refactor
Critical
Avoid Returning Null in Non-Async Task Methods
Returning null from a Task or Task<T> method causes a NullReferenceException if awaited. Use Task.CompletedTask or Task.FromResult<T>(null) instead.
error-handlingreadability-refactor+1
Critical
Avoid Using Boolean Expressions in `except` Statements
Detect `except` clauses that use `or` or `and` to catch multiple exceptions. This does not work as intended. Recommend using a tuple of exceptions instead.
error-handlingstack-python

Why this matters

Bad vs. good

More snippets

Related rules

Avoid equality operators in loop termination conditions

Avoid Returning Null in Non-Async Task Methods

Avoid Using Boolean Expressions in `except` Statements

Why this matters

Bad vs. good

More snippets

Related rules

Avoid equality operators in loop termination conditions

Avoid Returning Null in Non-Async Task Methods

Avoid Using Boolean Expressions in `except` Statements