crash on reaper v5.412 startup

[David-Else]

EDIT: I found the problem, it was a new VST called combox I had just added that crashes LinVST on scan!

on reaper v5.412 (may 18 2017) - in ALSA mode, i got this LinVST crash on starting Reaper before any project had loaded.

after that crash LinVST seemed to still be working fine. i loaded reaper again and did not get the crash the next time.

Unhandled exception: page fault on read access to 0x00000000 in 64-bit code (0x000000018000508e).
Register dump:
 rip:000000018000508e rsp:000000000023f780 rbp:000000000023f880 eflags:00010286 (  R- --  I S - -P- )
 rax:0000000000000000 rbx:0000000000000038 rcx:0000000180063b08 rdx:0000000180063b10
 rsi:0000000000044a00 rdi:0000000000000006  r8:0000000000000000  r9:0000000000000fa0 r10:fffffffe8000b1a8
 r11:0000000000000000 r12:0000000000000000 r13:000000007e32b1c0 r14:0000000000058980 r15:0000000000000000
Stack dump:
0x000000000023f780:  0000000180063b08 0000000000000038
0x000000000023f790:  000000000023f880 0000000000044a00
0x000000000023f7a0:  3f80000000000000 000000000023f830
0x000000000023f7b0:  444a704f6336736f 4236363654505542
0x000000000023f7c0:  3ff0000000000000 484d764275497a4b
0x000000000023f7d0:  ffffffffffffffff ffffffffffffffff
0x000000000023f7e0:  ffffffffffffffff ffffffffffffffff
0x000000000023f7f0:  ffffffffffffffff ffffffffffffffff
0x000000000023f800:  fffffffffffffffe 656c646e6148656c
0x000000000023f810:  3f80000000000000 000000c3000000a5
0x000000000023f820:  0000002d0000000f 000000c3000000a5
0x000000000023f830:  000000000005efb0 00003b2e00000096
Backtrace:
=>0 0x000000018000508e in combox (+0x508e) (0x000000000023f880)
  1 0x00007f56e24e05e0 _IO_2_1_stderr_+0xdf() in libc.so.6 (0x000000000005e9d0)
0x000000018000508e: movq	(%r15),%rax
Modules:
Module	Address					Debug info	Name (104 modules)
ELF	        7b400000-        7b82c000	Deferred        kernel32<elf>
  \-PE	        7b420000-        7b82c000	\               kernel32
ELF	        7bc00000-        7bd48000	Deferred        ntdll<elf>
  \-PE	        7bc20000-        7bd48000	\               ntdll
ELF	        7c000000-        7c004000	Deferred        <wine-loader>
PE	       180000000-       1807b4000	Export          combox
ELF	    7f56d067b000-    7f56d088f000	Deferred        api-ms-win-core-sysinfo-l1-2-1<e
PE	    7f56d0680000-    7f56d088f000	Deferred        api-ms-win-core-sysinfo-l1-2-1
PE	    7f56d088f000-    7f56d0aa3000	Deferred        api-ms-win-core-localization-l1-
PE	    7f56d0890000-    7f56d0aa3000	Deferred        api-ms-win-core-localization-l1-C:\windows\system32\api-ms-win-core-localization-l1-2-1.dll
ELF	    7f56d0aa3000-    7f56d0cb6000	Deferred        api-ms-win-core-fibers-l1-1-1<el
PE	    7f56d0ab0000-    7f56d0cb6000	Deferred        api-ms-win-core-fibers-l1-1-1
ELF	    7f56d0cb6000-    7f56d0eca000	Deferred        api-ms-win-core-synch-l1-2-0<elf
PE	    7f56d0cc0000-    7f56d0eca000	Deferred        api-ms-win-core-synch-l1-2-0
ELF	    7f56d0eca000-    7f56d10de000	Deferred        libgpg-error.so.0
ELF	    7f56d10de000-    7f56d13c4000	Deferred        libgcrypt.so.20
ELF	    7f56d13c4000-    7f56d15d8000	Deferred        liblz4.so.1
ELF	    7f56d15d8000-    7f56d17fe000	Deferred        liblzma.so.5
ELF	    7f56d17fe000-    7f56d1a06000	Deferred        librt.so.1
ELF	    7f56d1a06000-    7f56d1c0b000	Deferred        libcap.so.2
ELF	    7f56d1c0b000-    7f56d1e7e000	Deferred        libpcre.so.1
ELF	    7f56d1e7e000-    7f56d1f09000	Deferred        libsystemd.so.0
ELF	    7f56d1f09000-    7f56d2111000	Deferred        libffi.so.6
ELF	    7f56d2111000-    7f56d2338000	Deferred        libselinux.so.1
ELF	    7f56d2338000-    7f56d253b000	Deferred        libfreebl3.so
ELF	    7f56d253b000-    7f56d278b000	Deferred        libdbus-1.so.3
ELF	    7f56d278b000-    7f56d2a1e000	Deferred        libgmp.so.10
ELF	    7f56d2a1e000-    7f56d2c4a000	Deferred        libhogweed.so.4
ELF	    7f56d2c4a000-    7f56d2e82000	Deferred        libnettle.so.6
ELF	    7f56d2e82000-    7f56d3095000	Deferred        libtasn1.so.6
ELF	    7f56d3095000-    7f56d33c5000	Deferred        libunistring.so.2
ELF	    7f56d33c5000-    7f56d35e7000	Deferred        libidn2.so.0
ELF	    7f56d35e7000-    7f56d384c000	Deferred        libp11-kit.so.0
ELF	    7f56d384c000-    7f56d3a67000	Deferred        libresolv.so.2
ELF	    7f56d3a67000-    7f56d3c6b000	Deferred        libkeyutils.so.1
ELF	    7f56d3c6b000-    7f56d3e7a000	Deferred        libkrb5support.so.0
ELF	    7f56d3e7a000-    7f56d40b0000	Deferred        libcrypt.so.1
ELF	    7f56d40b0000-    7f56d42c1000	Deferred        libavahi-client.so.3
ELF	    7f56d42c1000-    7f56d44ce000	Deferred        libavahi-common.so.3
ELF	    7f56d44ce000-    7f56d4835000	Deferred        libgnutls.so.30
ELF	    7f56d4835000-    7f56d4a39000	Deferred        libcom_err.so.2
ELF	    7f56d4a39000-    7f56d4c6a000	Deferred        libk5crypto.so.3
ELF	    7f56d4c6a000-    7f56d4f50000	Deferred        libkrb5.so.3
ELF	    7f56d4f50000-    7f56d519d000	Deferred        libgssapi_krb5.so.2
ELF	    7f56d519d000-    7f56d542d000	Deferred        libcups.so.2
ELF	    7f56d544b000-    7f56d568b000	Deferred        uxtheme<elf>
  \-PE	    7f56d5450000-    7f56d568b000	\               uxtheme
ELF	    7f56d568b000-    7f56d5891000	Deferred        libxfixes.so.3
ELF	    7f56d5891000-    7f56d5a9c000	Deferred        libxcursor.so.1
ELF	    7f56d5a9c000-    7f56d5cac000	Deferred        libxi.so.6
ELF	    7f56d5cac000-    7f56d5eaf000	Deferred        libxcomposite.so.1
ELF	    7f56d5eaf000-    7f56d60ba000	Deferred        libxrandr.so.2
ELF	    7f56d60ba000-    7f56d62c4000	Deferred        libxrender.so.1
ELF	    7f56d62c4000-    7f56d64ca000	Deferred        libxxf86vm.so.1
ELF	    7f56d64ca000-    7f56d66cd000	Deferred        libxinerama.so.1
ELF	    7f56d66cd000-    7f56d68d1000	Deferred        libxau.so.6
ELF	    7f56d68d1000-    7f56d6af9000	Deferred        libxcb.so.1
ELF	    7f56d6af9000-    7f56d6e38000	Deferred        libx11.so.6
ELF	    7f56d6e38000-    7f56d704a000	Deferred        libxext.so.6
ELF	    7f56d7068000-    7f56d7323000	Deferred        winex11<elf>
  \-PE	    7f56d7080000-    7f56d7323000	\               winex11
ELF	    7f56d7323000-    7f56d7575000	Deferred        winspool<elf>
  \-PE	    7f56d7330000-    7f56d7575000	\               winspool
ELF	    7f56d7575000-    7f56d7883000	Deferred        comdlg32<elf>
  \-PE	    7f56d7580000-    7f56d7883000	\               comdlg32
ELF	    7f56d7883000-    7f56d7ac6000	Deferred        ws2_32<elf>
  \-PE	    7f56d7890000-    7f56d7ac6000	\               ws2_32
ELF	    7f56d7ac6000-    7f56d7f87000	Deferred        shell32<elf>
  \-PE	    7f56d7ae0000-    7f56d7f87000	\               shell32
ELF	    7f56d7f87000-    7f56d8227000	Deferred        shlwapi<elf>
  \-PE	    7f56d7fa0000-    7f56d8227000	\               shlwapi
ELF	    7f56d8227000-    7f56d8457000	Deferred        mpr<elf>
  \-PE	    7f56d8230000-    7f56d8457000	\               mpr
ELF	    7f56d8457000-    7f56d86ec000	Deferred        wininet<elf>
  \-PE	    7f56d8460000-    7f56d86ec000	\               wininet
ELF	    7f56d86ec000-    7f56d8a38000	Deferred        comctl32<elf>
  \-PE	    7f56d8700000-    7f56d8a38000	\               comctl32
ELF	    7f56d8a39000-    7f56d8c63000	Deferred        imm32<elf>
  \-PE	    7f56d8a40000-    7f56d8c63000	\               imm32
ELF	    7f56d8ce1000-    7f56d8f0b000	Deferred        libexpat.so.1
ELF	    7f56d8f0b000-    7f56d914f000	Deferred        libfontconfig.so.1
ELF	    7f56d914f000-    7f56d9382000	Deferred        libpng16.so.16
ELF	    7f56d9382000-    7f56d9592000	Deferred        libbz2.so.1
ELF	    7f56d9592000-    7f56d97a8000	Deferred        libz.so.1
ELF	    7f56d97a8000-    7f56d9a53000	Deferred        libfreetype.so.6
ELF	    7f56d9a53000-    7f56d9c6f000	Deferred        version<elf>
  \-PE	    7f56d9a60000-    7f56d9c6f000	\               version
ELF	    7f56d9c6f000-    7f56d9f15000	Deferred        advapi32<elf>
  \-PE	    7f56d9c80000-    7f56d9f15000	\               advapi32
ELF	    7f56d9f15000-    7f56da2b9000	Deferred        gdi32<elf>
  \-PE	    7f56d9f30000-    7f56da2b9000	\               gdi32
ELF	    7f56da2b9000-    7f56da6a4000	Deferred        user32<elf>
  \-PE	    7f56da2e0000-    7f56da6a4000	\               user32
ELF	    7f56daa2c000-    7f56dac4e000	Deferred        lin-vst-server<elf>
  \-PE	    7f56daa40000-    7f56dac4e000	\               lin-vst-server
ELF	    7f56dac4e000-    7f56dae60000	Deferred        libnss_files.so.2
ELF	    7f56e19f9000-    7f56e1c10000	Deferred        libgcc_s.so.1
ELF	    7f56e1c10000-    7f56e1f19000	Deferred        libm.so.6
ELF	    7f56e1f1b000-    7f56e211f000	Deferred        libdl.so.2
ELF	    7f56e211f000-    7f56e24e5000	Dwarf           libc.so.6
ELF	    7f56e24e5000-    7f56e2703000	Deferred        libpthread.so.0
ELF	    7f56e2721000-    7f56e2ac9000	Dwarf           libwine.so.1
ELF	    7f56e2acb000-    7f56e2cf3000	Deferred        ld-linux-x86-64.so.2
ELF	    7ffedb4e4000-    7ffedb4e5000	Deferred        [vdso].so
Threads:
process  tid      prio (all id:s are in hex)
0000000e services.exe
	00000020    0
	0000001f    0
	00000014    0
	00000010    0
	0000000f    0
00000012 winedevice.exe
	0000001e    0
	00000019    0
	00000018    0
	00000013    0
0000001c plugplay.exe
	00000022    0
	00000021    0
	0000001d    0
00000023 explorer.exe
	0000002a    0
	00000029    0
	00000028    0
	00000027    0
	00000024    0
00000025 (D) Z:\usr\bin\lin-vst-server.exe
	00000026    0 <==
System information:
    Wine build: wine-2.0.1
    Platform: x86_64
    Version: Windows 7
    Host system: Linux
    Host version: 4.10.8-200.fc25.x86_64

[David-Else]

I assume the problem was with combox.dll not LinVST so closing the issue, but if you have a clue why this plugin crashes while all the others by the same author in the same framework don't it would be helpful.