Toggling fullscreen breaks core

[orbea]

Description

When toggling fullscreen with fppsspp renders a broken image.

Apitrace: http://ks392457.kimsufi.com/orbea/stuff/trace/retroarch_ppsspp.trace.xz
Log : https://pastebin.com/ZpihsHQb
Example errors.

32742: message: major api error 2: GL_INVALID_VALUE in glDeleteProgram
32742 @0 glDeleteProgram(program = 75)

34966: message: api issue 3: FBO incomplete: no attachments and default width or height is 0 [-1]
34966 @0 glClear(mask = GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT)

Expected behavior

Toggling fullscreen should work.

Actual behavior

Toggling fullscreen breaks gameplay.

Steps to reproduce the bug

1. Start a game.
2. Toggle fullscreen with f.
3. The core renders a broken image of the background.

Bisect Results

Seems to have started with the new core.

Version/Commit

You can find this information under Information/System Information

ppsspp-libretro commit: 8672e0c

• RetroArch: RetroArch-2017.11.18_c89ed11_master-x86_64-1_git

Environment information

• OS: Slackware64-current
• Compiler: gcc-7.2.0

[orbea]

To replay the trace at least this commit will be needed for apitrace.
apitrace/apitrace@67f7b93

[orbea]

New issue made upstream.