[Issue 22778] New: druntime: infinite loop in gc_term if an object destructor throws

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22778

          Issue ID: 22778
           Summary: druntime: infinite loop in gc_term if an object
                    destructor throws
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: critical
          Priority: P1
         Component: druntime
          Assignee: nobody at puremagic.com
          Reporter: ibuclaw at gdcproject.org

---
struct S8
{
    int b;
    ~this()
    {
        assert(b == 7);
    }
}

void main()
{
    S8 *s = new S8(9);
}
---

Backtrace
---
#0  0x00007ffff7e4f9da in __GI___clock_nanosleep (clock_id=clock_id at entry=0,
flags=flags at entry=0, req=0x7fffffffd3c0, rem=0x7fffffffd3d0) at
../sysdeps/unix/sysv/linux/clock_nanosleep.c:78
#1  0x00007ffff7e54957 in __GI___nanosleep (req=<optimised out>, rem=<optimised
out>) at ../sysdeps/unix/sysv/linux/nanosleep.c:25
#2  0x000055555560361c in core.thread.osthread.Thread.sleep(core.time.Duration)
()
#3  0x0000555555605ca8 in core.internal.spinlock.SpinLock.yield(ulong) shared
()
#4  0x0000555555605c52 in core.internal.spinlock.SpinLock.lock() shared ()
#5  0x000055555560f073 in
core.internal.gc.impl.conservative.gc.ConservativeGC.runLocked!(core.internal.gc.impl.conservative.gc.ConservativeGC.mallocNoSync(ulong,
uint, ref ulong, const(TypeInfo)), core.in
ternal.gc.impl.conservative.gc.mallocTime,
core.internal.gc.impl.conservative.gc.numMallocs, ulong, uint, ulong,
const(TypeInfo)).runLocked(ref ulong, ref uint, ref ulong, ref const(TypeInfo))
()
#6  0x000055555560699a in
core.internal.gc.impl.conservative.gc.ConservativeGC.malloc(ulong, uint,
const(TypeInfo)) ()
#7  0x00005555555f234b in gc_malloc ()
#8  0x00005555555e9639 in _d_newclass ()
#9  0x00005555555f8231 in core.runtime.defaultTraceHandler(void*) ()
#10 0x00005555555f3cf2 in _d_traceContext ()
#11 0x00005555555f3ae2 in _d_createTrace ()
#12 0x00005555555e898e in _d_throwdwarf ()
#13 0x000055555560b385 in
core.internal.gc.impl.conservative.gc.Gcx.fullcollect(bool, bool, bool) ()
#14 0x000055555560fb84 in
core.internal.gc.impl.conservative.gc.ConservativeGC.runLocked!(core.internal.gc.impl.conservative.gc.ConservativeGC.fullCollectNoStack().go(core.internal.gc.impl.conservative.gc.
Gcx*), core.internal.gc.impl.conservative.gc.Gcx*).runLocked(ref
core.internal.gc.impl.conservative.gc.Gcx*) ()
#15 0x0000555555607d68 in
core.internal.gc.impl.conservative.gc.ConservativeGC.fullCollectNoStack() ()
#16 0x0000555555607cf6 in
core.internal.gc.impl.conservative.gc.ConservativeGC.collectNoStack() ()
#17 0x00005555555fed93 in gc_term ()
#18 0x00005555555f3c1b in rt_term ()
---


To highlight more specifically
---
...
#8  0x00005555555e9639 in _d_newclass ()  # <---
#9  0x00005555555f8231 in core.runtime.defaultTraceHandler(void*) ()
#10 0x00005555555f3cf2 in _d_traceContext ()
#11 0x00005555555f3ae2 in _d_createTrace ()
#12 0x00005555555e898e in _d_throwdwarf ()
...
#17 0x00005555555fed93 in gc_term ()
#18 0x00005555555f3c1b in rt_term ()
---

D runtime should not be using `_d_newclass` here.

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