*** Assertion failure in uint64_t (anonymous namespace)::GetLogicalKeyForEvent(FlutterUIPressProxy *, uint64_t)(), FlutterEmbedderKeyResponder.mm:173
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Unexpected long key label: |UIKeyInputEscape|.'

#include "flutter/testing/test_gl_surface.h"
          ^--------------------------------
It is not in any dependency of
  //flutter/shell/common:shell_unittests
The include file is in the target(s):
  //flutter/testing:opengl
which should somehow be reachable.

static uint64_t GetLogicalKeyForEvent(FlutterUIPressProxy* press, uint64_t physicalKey)
    API_AVAILABLE(ios(13.4)) {
  // Look to see if the keyCode can be mapped from keycode.
  auto fromKeyCode = keyCodeToLogicalKey.find(press.key.keyCode);
  if (fromKeyCode != keyCodeToLogicalKey.end()) {
    return fromKeyCode->second;
  }
  const char* characters =
      getEventCharacters(press.key.charactersIgnoringModifiers, press.key.keyCode);
  NSString* keyLabel =
      characters == nullptr ? nil : [[[NSString alloc] initWithUTF8String:characters] autorelease];
  NSUInteger keyLabelLength = [keyLabel length];
  // If this key is printable, generate the logical key from its Unicode
  // value. Control keys such as ESC, CTRL, and SHIFT are not printable. HOME,
  // DEL, arrow keys, and function keys are considered modifier function keys,
  // which generate invalid Unicode scalar values.
  if (keyLabelLength != 0 && !IsControlCharacter(keyLabelLength, keyLabel) &&
      !IsUnprintableKey(keyLabelLength, keyLabel)) {
    // Given that charactersIgnoringModifiers can contain a string of arbitrary
    // length, limit to a maximum of two Unicode scalar values. It is unlikely
    // that a keyboard would produce a code point bigger than 32 bits, but it is
    // still worth defending against this case.
    NSCAssert((keyLabelLength < 2), @"Unexpected long key label: |%@|.", keyLabel);

    uint64_t codeUnit = (uint64_t)[keyLabel characterAtIndex:0];
    if (keyLabelLength == 2) {
      uint64_t secondCode = (uint64_t)[keyLabel characterAtIndex:1];
      codeUnit = (codeUnit << 16) | secondCode;
    }
    return KeyOfPlane(toLower(codeUnit), kUnicodePlane);
  }

  // This is a non-printable key that is unrecognized, so a new code is minted
  // with the autogenerated bit set.
  return KeyOfPlane(press.key.keyCode, kIosPlane);
}