Arduino 1.9 on macOS 10.13 — Code complete is not available. Try increasing ulimit.

On macOS 10.13, pressing Ctrl-Space for code complete (and waiting a while) throws an error message.

`Code complete is not available. Try increasing ulimit.`

Full log:

> /private/var/folders/px/cyfvtr757lqg0yp_cv9j79jh0000gn/T/AppTranslocation/1908B6D7-0CE2-4CFC-A7DD-8429EACCC25F/d/Arduino.app/Contents/Java/arduino-builder -code-complete-at /var/folders/px/cyfvtr757lqg0yp_cv9j79jh0000gn/T/arduino_modified_sketch_621385/sketch_oct17a.ino:3:14 -logger=machine -hardware /private/var/folders/px/cyfvtr757lqg0yp_cv9j79jh0000gn/T/AppTranslocation/1908B6D7-0CE2-4CFC-A7DD-8429EACCC25F/d/Arduino.app/Contents/Java/hardware -hardware /Users/ReiVilo/Library/Arduino15/packages -tools /private/var/folders/px/cyfvtr757lqg0yp_cv9j79jh0000gn/T/AppTranslocation/1908B6D7-0CE2-4CFC-A7DD-8429EACCC25F/d/Arduino.app/Contents/Java/tools-builder -tools /private/var/folders/px/cyfvtr757lqg0yp_cv9j79jh0000gn/T/AppTranslocation/1908B6D7-0CE2-4CFC-A7DD-8429EACCC25F/d/Arduino.app/Contents/Java/hardware/tools/avr -tools /Users/ReiVilo/Library/Arduino15/packages -built-in-libraries /private/var/folders/px/cyfvtr757lqg0yp_cv9j79jh0000gn/T/AppTranslocation/1908B6D7-0CE2-4CFC-A7DD-8429EACCC25F/d/Arduino.app/Contents/Java/libraries -libraries /Users/ReiVilo/Documents/Projets/Arduino/libraries -fqbn=arduino:samd:arduino_zero_edbg -ide-version=10900 -build-path /var/folders/px/cyfvtr757lqg0yp_cv9j79jh0000gn/T/arduino_build_481988 -warnings=none -build-cache /var/folders/px/cyfvtr757lqg0yp_cv9j79jh0000gn/T/arduino_cache_219975 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.bossac.path=/Users/ReiVilo/Library/Arduino15/packages/arduino/tools/bossac/1.7.0 -prefs=runtime.tools.CMSIS.path=/Users/ReiVilo/Library/Arduino15/packages/arduino/tools/CMSIS/4.5.0 -prefs=runtime.tools.arm-none-eabi-gcc.path=/Users/ReiVilo/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/4.8.3-2014q1 -prefs=runtime.tools.openocd.path=/Users/ReiVilo/Library/Arduino15/packages/arduino/tools/openocd/0.9.0-arduino6-static -prefs=runtime.tools.CMSIS-Atmel.path=/Users/ReiVilo/Library/Arduino15/packages/arduino/tools/CMSIS-Atmel/1.1.0 -prefs=runtime.tools.arduinoOTA.path=/Users/ReiVilo/Library/Arduino15/packages/arduino/tools/arduinoOTA/1.2.0 /var/folders/px/cyfvtr757lqg0yp_cv9j79jh0000gn/T/arduino_modified_sketch_621385/sketch_oct17a.ino
> autocomplete failure output:
>
> com.fasterxml.jackson.databind.JsonMappingException: No content to map due to end-of-input
> at [Source: ; line: 1, column: 1]
> at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:148)
> at com.fasterxml.jackson.databind.ObjectMapper._initForReading(ObjectMapper.java:3781)
> at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3721)
> at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2726)
> 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:1663)
> 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:6310)
> at java.awt.Container.processEvent(Container.java:2236)
> at java.awt.Component.dispatchEventImpl(Component.java:4889)
> at java.awt.Container.dispatchEventImpl(Container.java:2294)
> at java.awt.Component.dispatchEvent(Component.java:4711)
> at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
> at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:806)
> at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1074)
> at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:945)
> at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:771)
> at java.awt.Component.dispatchEventImpl(Component.java:4760)
> at java.awt.Container.dispatchEventImpl(Container.java:2294)
> at java.awt.Window.dispatchEventImpl(Window.java:2746)
> at java.awt.Component.dispatchEvent(Component.java:4711)
> at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
> 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:80)
> at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
> at java.awt.EventQueue$4.run(EventQueue.java:731)
> at java.awt.EventQueue$4.run(EventQueue.java:729)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
> at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
> at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
> 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)
>

Reproduce the failure in Arduino IDE 1.9 on macOS 10.13 by pressing Ctrl-Space, then start at cc.arduino.autocomplete.ClangCompletionProvider.getCompletionsImpl in the stack trace and inspect the arduino-builder -code-complete-at invocation. Done means code completion returns results without the ulimit message or empty JSON parsing error.

Written by the indexing model from the issue text.