This is a testharness.js-based test.
FAIL Piping from an errored readable stream to an erroring writable stream assert_throws: pipeTo must reject with the writable stream's error function "function() { throw e }" threw object "TypeError: Failed to execute 'pipeTo' on 'ReadableStream': pipeTo disabled because StreamsNative feature is enabled" ("TypeError") expected object "error2: error2!" ("error2")
FAIL Piping from an errored readable stream to an errored writable stream assert_throws: pipeTo must reject with the readable stream's error function "function() { throw e }" threw object "TypeError: Failed to execute 'pipeTo' on 'ReadableStream': pipeTo disabled because StreamsNative feature is enabled" ("TypeError") expected object "error1: error1!" ("error1")
FAIL Piping from an errored readable stream to an erroring writable stream; preventAbort = true assert_throws: pipeTo must reject with the readable stream's error function "function() { throw e }" threw object "TypeError: Failed to execute 'pipeTo' on 'ReadableStream': pipeTo disabled because StreamsNative feature is enabled" ("TypeError") expected object "error1: error1!" ("error1")
FAIL Piping from an errored readable stream to an errored writable stream; preventAbort = true assert_throws: pipeTo must reject with the readable stream's error function "function() { throw e }" threw object "TypeError: Failed to execute 'pipeTo' on 'ReadableStream': pipeTo disabled because StreamsNative feature is enabled" ("TypeError") expected object "error1: error1!" ("error1")
FAIL Piping from an errored readable stream to a closing writable stream assert_throws: pipeTo must reject with the readable stream's error function "function() { throw e }" threw object "TypeError: Failed to execute 'pipeTo' on 'ReadableStream': pipeTo disabled because StreamsNative feature is enabled" ("TypeError") expected object "error1: error1!" ("error1")
FAIL Piping from an errored readable stream to a closed writable stream assert_throws: pipeTo must reject with the readable stream's error function "function() { throw e }" threw object "TypeError: Failed to execute 'pipeTo' on 'ReadableStream': pipeTo disabled because StreamsNative feature is enabled" ("TypeError") expected object "error1: error1!" ("error1")
FAIL Piping from a closed readable stream to an erroring writable stream assert_throws: pipeTo must reject with the writable stream's error function "function() { throw e }" threw object "TypeError: Failed to execute 'pipeTo' on 'ReadableStream': pipeTo disabled because StreamsNative feature is enabled" ("TypeError") expected object "error1: error1!" ("error1")
FAIL Piping from a closed readable stream to an errored writable stream assert_throws: pipeTo must reject with the writable stream's error function "function() { throw e }" threw object "TypeError: Failed to execute 'pipeTo' on 'ReadableStream': pipeTo disabled because StreamsNative feature is enabled" ("TypeError") expected object "error2: error2!" ("error2")
FAIL Piping from a closed readable stream to a closed writable stream promise_test: Unhandled rejection with value: object "TypeError: Failed to execute 'pipeTo' on 'ReadableStream': pipeTo disabled because StreamsNative feature is enabled"
Harness: the test ran to completion.