(gdb) run
Starting program: /usr/bin/spherun .
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
miniSphere 5.0.0 JS game engine (x64)
a lightweight JavaScript-powered game engine
(c) 2015-2017 Fat Cerberus

[New Thread 0x7ff7e79e1700 (LWP 16102)]
[New Thread 0x7ff7e6526700 (LWP 16103)]
[New Thread 0x7ff7e5d25700 (LWP 16104)]
[New Thread 0x7ff7e5524700 (LWP 16105)]
[New Thread 0x7ff7e4cdf700 (LWP 16106)]
[New Thread 0x7ff7d7fff700 (LWP 16107)]
[New Thread 0x7ff7d37fe700 (LWP 16108)]
[New Thread 0x7ff7d2ffd700 (LWP 16109)]
[New Thread 0x7ff7b3fff700 (LWP 16110)]
[New Thread 0x7ff7b37fe700 (LWP 16111)]
[New Thread 0x7ff7b2ffd700 (LWP 16112)]
[New Thread 0x7ff7b27fc700 (LWP 16113)]
[New Thread 0x7ff7b1e6f700 (LWP 16114)]
[New Thread 0x7ff7b166e700 (LWP 16115)]
log: about to load map
spherun: /build/allegro5-3qTrvn/allegro5-5.2.2/src/file.c:104: al_fread: Assertion `ptr' failed.

Thread 1 "spherun" received signal SIGABRT, Aborted.
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
58  ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0  0x00007ffff3d5877f in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
#1  0x00007ffff3d5a37a in __GI_abort () at abort.c:89
#2  0x00007ffff3d50b47 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x7ffff6f3a427 "ptr", file=file@entry=0x7ffff6f3a398 "/build/allegro5-3qTrvn/allegro5-5.2.2/src/file.c", line=line@entry=104, function=function@entry=0x7ffff6f3a738 "al_fread")
    at assert.c:92
#3  0x00007ffff3d50bf2 in __GI___assert_fail (assertion=0x7ffff6f3a427 "ptr", file=0x7ffff6f3a398 "/build/allegro5-3qTrvn/allegro5-5.2.2/src/file.c", line=104, function=0x7ffff6f3a738 "al_fread") at assert.c:101
#4  0x00007ffff6ec2306 in al_fread () at /usr/lib/x86_64-linux-gnu/liballegro.so.5.2
#5  0x0000555555579ee6 in file_read (it=0x555557050b10, buf=0x0, count=0, size=1) at src/minisphere/game.c:809
#6  0x000055555558f0b8 in js_FileStream_read (num_args=1, is_ctor=false, magic=0) at src/minisphere/pegasus.c:2244
#7  0x00005555555694c8 in on_js_to_native_call (callee=0x7ff7e447f950, is_ctor=false, argv=0x7fffffffb2a0, argc=2, userdata=0x5555561a1180)
    at src/shared/jsal.c:2724
#8  0x00007ffff4ea0eea in Js::JavascriptExternalFunction::StdCallExternalFunctionThunk(Js::RecyclableObject*, Js::CallInfo, ...) ()
    at /usr/lib/libChakraCore.so
#9  0x00007ffff4fb1e9e in amd64_CallFunction () at /usr/lib/libChakraCore.so
#10 0x00007ffff4c67a52 in Js::ScriptContext::ProfileModeThunk_DebugModeWrapper(Js::JavascriptFunction*, Js::ScriptContext*, void* (*)(Js::RecyclableObject*, Js::CallInfo, ...), Js::Arguments&) () at /usr/lib/libChakraCore.so
#11 0x00007ffff4c670c2 in Js::ScriptContext::DebugProfileProbeThunk(Js::RecyclableObject*, Js::CallInfo, ...) ()
    at /usr/lib/libChakraCore.so
#12 0x00007ffff4fb1e9e in amd64_CallFunction () at /usr/lib/libChakraCore.so
#13 0x00007ffff4dec3d2 in void Js::InterpreterStackFrame::OP_CallCommon<Js::OpLayoutDynamicProfile<Js::OpLayoutT_CallIWithICIndex<Js::LayoutSizePolicy<(Js::LayoutSize)0> > > >(Js::OpLayoutDynamicProfile<Js::OpLayoutT_CallIWithICIndex<Js::LayoutSizePolicy<(Js::LayoutSize)0> > > const*, Js::RecyclableObject*, unsigned int, Js::AuxArray<unsigned int> const*) () at /usr/lib/libChakraCore.so
#14 0x00007ffff4de4abe in void Js::InterpreterStackFrame::OP_ProfiledCallIWithICIndex<Js::OpLayoutT_CallIWithICIndex<Js::LayoutSizePolicy<(Js::LayoutSize)0> > >(Js::OpLayoutDynamicProfile<Js::OpLayoutT_CallIWithICIndex<Js::LayoutSizePolicy<(Js::LayoutSize)0> > > const*) ()
    at /usr/lib/libChakraCore.so
#15 0x00007ffff4d8a3ba in Js::InterpreterStackFrame::ProcessWithDebugging() () at /usr/lib/libChakraCore.so
#16 0x00007ffff4d82da8 in Js::InterpreterStackFrame::DebugProcess() () at /usr/lib/libChakraCore.so
#17 0x00007ffff4d82686 in Js::InterpreterStackFrame::InterpreterHelper(Js::ScriptFunction*, Js::ArgumentReader, void*, void*, Js::InterpreterStackFrame::AsmJsReturnStruct*) () at /usr/lib/libChakraCore.so
#18 0x00007ffff4d82210 in Js::InterpreterStackFrame::InterpreterThunk(Js::JavascriptCallStackLayout*) () at /usr/lib/libChakraCore.so
#19 0x00007ff7e4490172 in  ()
#20 0x00007fffffffb910 in  ()
#21 0x00007ffff4fb1e9e in amd64_CallFunction () at /usr/lib/libChakraCore.so