fix(console): console.assert() logs on failure, not on success#318
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andreiltd merged 1 commit intoJul 20, 2026
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console.assert()'s condition was inverted: `if (!condition) return` made it stay silent when the assertion failed and print "Assertion failed" when it passed — the opposite of the cited Console spec, whose step 1 is "If condition is true, return." Also use JS::ToBoolean() instead of Value::toBoolean(): the latter asserts the argument is already a boolean and crashes a debug build (UB in release) on a non-boolean condition such as console.assert(0). The spec coerces condition to a boolean. Add an e2e test asserting the serve stdout for truthy/falsy and boolean/non-boolean conditions. Signed-off-by: Daijiro Wachi <daijiro.wachi@gmail.com>
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Makes sense, thank you for the fix.
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console.assert()'s condition was inverted:
if (!condition) returnmade it stay silent when the assertion failed and print "Assertion failed" when it passed — the opposite of the cited Console spec, whose step 1 is "If condition is true, return."Also use JS::ToBoolean() instead of Value::toBoolean(): the latter asserts the argument is already a boolean and crashes a debug build (UB in release) on a non-boolean condition such as console.assert(0). The spec coerces condition to a boolean.
Add an e2e test asserting the serve stdout for truthy/falsy and boolean/non-boolean conditions.