code complete not work at all in linux beta 64bit 1.9.0 version

Hi
the code completion not work atall for me in debian linux 64b version of arduino ide beta (1.9.0).

time="2019-10-31T11:30:06+03:30" level=info msg="Loading hardware from: /home/ali/arduino-PR-beta1.9-BUILD-116/hardware"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading package arduino from: /home/ali/arduino-PR-beta1.9-BUILD-116/hardware/arduino"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded platform" platform="arduino:avr@1.8.1"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading package discoverers from: /home/ali/arduino-PR-beta1.9-BUILD-116/hardware/discoverers"

time="2019-10-31T11:30:06+03:30" level=warning msg="Can't determine bundle platform version for discoverers:disco, no valid release found"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded platform" platform="discoverers:disco@"

time="2019-10-31T11:30:06+03:30" level=info msg="Excluding directory: /home/ali/arduino-PR-beta1.9-BUILD-116/hardware/tools"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading hardware from: /home/ali/.arduino15/packages"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading package builtin from: /home/ali/.arduino15/packages/builtin"

time="2019-10-31T11:30:06+03:30" level=info msg="Checking existence of 'tools' path: /home/ali/.arduino15/packages/builtin/tools"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading tools from dir: /home/ali/.arduino15/packages/builtin/tools"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool="builtin:ctags@5.8-arduino11"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool="builtin:serial-discovery@1.0.0"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading package esp8266 from: /home/ali/.arduino15/packages/esp8266/hardware"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded platform" platform="esp8266:esp8266@2.5.2"

time="2019-10-31T11:30:06+03:30" level=info msg="Checking existence of 'tools' path: /home/ali/.arduino15/packages/esp8266/tools"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading tools from dir: /home/ali/.arduino15/packages/esp8266/tools"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool="esp8266:mkspiffs@2.5.0-3-20ed2b9"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool="esp8266:python@3.7.2-post1"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool="esp8266:xtensa-lx106-elf-gcc@2.5.0-3-20ed2b9"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading tools from bundle dir: /home/ali/arduino-PR-beta1.9-BUILD-116/tools-builder"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading tools from dir: /home/ali/arduino-PR-beta1.9-BUILD-116/tools-builder"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool=":arduino-preprocessor@0.1.5"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool=":ctags@5.8-arduino11"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading tools from bundle dir: /home/ali/arduino-PR-beta1.9-BUILD-116/hardware/tools/avr"

time="2019-10-31T11:30:06+03:30" level=info msg="Found builtin_tools_versions.txt"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool="arduino:avrdude@6.3.0-arduino17"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool="arduino:arduinoOTA@1.3.0"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool="arduino:avr-gcc@7.3.0-atmel3.6.1-arduino5"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading tools from bundle dir: /home/ali/.arduino15/packages"

time="2019-10-31T11:30:06+03:30" level=info msg="Loading tools from dir: /home/ali/.arduino15/packages"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool=":builtin@tools"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool=":esp8266@hardware"

time="2019-10-31T11:30:06+03:30" level=info msg="Loaded tool" tool=":esp8266@tools"

time="2019-10-31T11:30:06+03:30" level=info msg="Searching tools required for board esp8266:esp8266:nodemcuv2"

time="2019-10-31T11:30:06+03:30" level=info msg="Adding libraries dir" dir=/home/ali/arduino-PR-beta1.9-BUILD-116/libraries location=ide

time="2019-10-31T11:30:06+03:30" level=info msg="Adding libraries dir" dir=/home/ali/.arduino15/packages/esp8266/hardware/esp8266/2.5.2/libraries location=platform

time="2019-10-31T11:30:06+03:30" level=info msg="Adding libraries dir" dir=/home/ali/Arduino/libraries location=sketchbook

time="2019-10-31T11:30:06+03:30" level=info msg="Resolving include ESP8266WiFi.h for arch esp8266"

time="2019-10-31T11:30:06+03:30" level=info msg=" found better lib" lib=ESP8266WiFi prio=512

time="2019-10-31T11:30:06+03:30" level=info msg="Resolving include MQTT.h for arch esp8266"

time="2019-10-31T11:30:06+03:30" level=info msg=" found better lib" lib=MQTT prio=503

time="2019-10-31T11:30:07+03:30" level=info msg="Resolving include DHT.h for arch esp8266"

time="2019-10-31T11:30:07+03:30" level=info msg=" found better lib" lib=DHT_sensor_library prio=303

time="2019-10-31T11:30:07+03:30" level=info msg="Resolving include Adafruit_NeoPixel.h for arch esp8266"

time="2019-10-31T11:30:07+03:30" level=info msg=" found better lib" lib=Adafruit_NeoPixel prio=503

time="2019-10-31T11:30:11+03:30" level=info msg="Resolving include Adafruit_Sensor.h for arch esp8266"

time="2019-10-31T11:30:11+03:30" level=info msg=" found better lib" lib=Adafruit_Unified_Sensor prio=003

signal: abortedterminate called after throwing an instance of 'std::logic_error'
what(): basic_string::_S_construct null not valid

com.fasterxml.jackson.databind.exc.MismatchedInputException: No content to map due to end-of-input
at [Source: (String)""; line: 1, column: 0]
at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:59)
at com.fasterxml.jackson.databind.ObjectMapper._initForReading(ObjectMapper.java:4133)
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3988)
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2992)
at cc.arduino.autocomplete.ClangCompletionProvider.getCompletionsImpl(ClangCompletionProvider.java:99)
at org.fife.ui.autocomplete.CompletionProviderBase.getCompletions(CompletionProviderBase.java:104)
at org.fife.ui.autocomplete.AutoCompletion.refreshPopupWindow(AutoCompletion.java:801)
at org.fife.ui.autocomplete.AutoCompletion$AutoCompleteAction.actionPerformed(AutoCompletion.java:1351)
at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1668)
at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)
at javax.swing.JComponent.processKeyBindings(JComponent.java:2929)
at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)
at java.awt.Component.processEvent(Component.java:6316)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:835)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1103)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:974)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:800)
at java.awt.Component.dispatchEventImpl(Component.java:4760)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Start at ClangCompletionProvider.java:99, where the autocomplete stack trace shows an empty response being parsed, and review the preceding autocomplete action and completion-provider flow. Reproduce the failure with the Debian 64-bit Arduino IDE beta and confirm that requesting code completion no longer aborts and returns usable results.

Written by the indexing model from the issue text.