Opened 12 years ago
Closed 11 years ago
#2060 closed defect (fixed)
index reduction method causes segmentation fault
Reported by: | lochel | Owned by: | jfrenkel |
---|---|---|---|
Priority: | high | Milestone: | 1.9.0 |
Component: | Backend | Version: | trunk |
Keywords: | Cc: |
Description
The following script
loadString(" package otherTests model pendulum4 parameter Real g=9.81; parameter Real L=0.5; parameter Real m=1; Real x; Real y; Real vx; Real vy; Real F; initial equation y = 0.0; der(y) = 0.0; equation vx = der(x); vy = der(y); m*der(vx) = -x/L*F; m*der(vy) = -y/L*F-m*g; x^2+y^2=L^2; end pendulum4; end otherTests; "); getErrorString(); setIndexReductionMethod("dummyDerivative"); getErrorString(); simulate(otherTests.pendulum4, startTime=0.0, stopTime=5.0); getErrorString();
produces the following output
true "" true "" Segmentation fault (core dumped)
for the test-file, see testsuite/simulation/modelica/others/pendulum4.mos
Change History (6)
comment:1 Changed 12 years ago by jfrenkel
comment:2 Changed 12 years ago by lochel
Okay - but there should be never ever a segmentation fault - even for bad combinations of everything.
Also there should be some information in the help-text for impossible combinations and at least some kind of message if they are selected anyway.
comment:3 Changed 12 years ago by jfrenkel
The best ist to remove the old matching and index reduction right now from the configuration options. Each second of work is wasted time.
We can discuss this to the next developer meeting.
comment:4 Changed 12 years ago by lochel
I agree. If these are obsolete options/modules they should be removed as soon as possible.
comment:5 Changed 12 years ago by lochel
I get the following compiler-errors if I use setMatchingAlgorithm("omc");
otherTests.pendulum4.o: In function `eqFunction_7': otherTests.pendulum4.c:(.text+0x10f2): undefined reference to `der' otherTests.pendulum4.o: In function `eqFunction_8': otherTests.pendulum4.c:(.text+0x132e): undefined reference to `der' otherTests.pendulum4.o: In function `eqFunction_17': otherTests.pendulum4.c:(.text+0x1eb2): undefined reference to `der' otherTests.pendulum4.o: In function `eqFunction_18': otherTests.pendulum4.c:(.text+0x20ee): undefined reference to `der' collect2: ld returned 1 exit status make: *** [omc_main_target] Error 1
comment:6 Changed 11 years ago by jfrenkel
- Resolution set to fixed
- Status changed from new to closed
- indexreduction method and matching "omc" are removed from omc
This is because the old Index Reduktion does not work in combination with the new Matching Algorithms. Use setMatchingAlgorithm("omc");
The old index reduction will be delete soon.