Bug 8505 – Threadgroups fails using DMD 2.060

Created attachment 1133 Source code for the example showing the problem. The attached code compiles and runs as expected using gdc on Debian Unstable: gdc -I. -O3 -c -o pi_d_threadsGlobalState_threadGroup.o pi_d_threadsGlobalState_threadGroup.d gdc -I. -O3 -c -o output_d.o output_d.d gdc -o pi_d_threadsGlobalState_threadGroup pi_d_threadsGlobalState_threadGroup.o output_d.o ./pi_d_threadsGlobalState_threadGroup ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 1 π = 3.141592653589970752 iteration count = 1000000000 elapse time = 8.610002 number of processors = 8 ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 2 π = 3.141592653589901030 iteration count = 1000000000 elapse time = 4.307193 number of processors = 8 ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 8 π = 3.141592653589769135 iteration count = 1000000000 elapse time = 1.126820 number of processors = 8 ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 32 π = 3.141592653589757145 iteration count = 1000000000 elapse time = 1.103556 number of processors = 8 Using dmd 2.060 installed using the deb on the DLang downloads website: rdmd pi_d_threadsGlobalState_threadGroup.d ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 1 π = 3.706147513366483626 iteration count = 1000000000 elapse time = 11.192674 number of processors = 8 ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 2 π = 0.000000000000000000 iteration count = 1000000000 elapse time = 0.000162 number of processors = 8 ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 8 π = 3.093593503818492962 iteration count = 1000000000 elapse time = 1.446934 number of processors = 8 ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 32 π = 2.126965177696329423 iteration count = 1000000000 elapse time = 1.436152 number of processors = 8

I downgraded to dmd 2.059 using the deb from the FTP site and the problem goes away, so this is very definitely a problem introduce in the 2.059 → 2.060 upgrade.

Result using 2.059 (sorry should have put this on previous comment): rdmd -O -release pi_d_threadsGlobalState_threadGroup.d ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 1 π = 3.141592653589970752 iteration count = 1000000000 elapse time = 8.608373 number of processors = 8 ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 2 π = 3.141592653589901030 iteration count = 1000000000 elapse time = 4.307447 number of processors = 8 ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 8 π = 3.141592653589768691 iteration count = 1000000000 elapse time = 1.103842 number of processors = 8 ======================== pi_d_threadsGlobalState_threadGroup.d, task count: 32 π = 3.141592653589756257 iteration count = 1000000000 elapse time = 1.117225 number of processors = 8

Works in the latest 2.061alpha. The root case is a closure bug fixed in issue #8774. *** This issue has been marked as a duplicate of issue 8774 ***