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********************* IBIS GOLDEN PARSER BUG REPORT FORM *********************
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INSTRUCTIONS

To report a bug in the IBIS golden parser.  Please fill out the top part
of the following form and send the complete form to info@ibis.org.

A list of reported bugs is maintained at http://ibis.org/bugs/ibischk/ .

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PARSER VERSION NUMBER: 7.1.0

PLATFORM (SPARC, HP700, PC, etc.): PC

OS AND VERSION: Windows 10

REPORTED BY: John Angulo, Siemens AG

DATE: April 17, 2022

DESCRIPTION OF BUG:

ibischk7_64.exe will freeze while syntax checking the file below in 
acdc_CheckModelProcessTestLoad(), acdc.c line 609, due to NULL pointer 
de-reference.  The code assumes that if a Vref_rising or Vref_falling 
subparameter is present under the [Model Spec] keyword, that a Vref
subparameter exists under the [Model] keyword.  In this case, it doesn't.

Note, "Freeze" means no Error or Warning message is issued, and the parser
stops or hangs without properly exiting.  (Control-C may be needed to exit
and to get to the command line).

A similar crash may happen when [Model Spec] has rising and falling Vmeas or
Rref, but [Model] does not have Vmeas or Rref, respectively.

INSERT IBIS FILE DEMONSTRATING THE BUG:

[IBIS Ver]       7.1
[File Name]      bug233.ibs
[File Rev]       1.0
[Date]           March 15, 2022

[Component]      BUG232 
[Manufacturer]   none
[Package]
R_pkg          0 0 0
L_pkg          0 0 0
C_pkg          0 0 0

[Pin]  signal_name          model_name           R_pin     L_pin     C_pin
|
1      bug233               bug233
|
[Model]          bug233
Model_type       I/O
Polarity         Non-Inverting
Enable           Active-High
Vinl =   0.9900V
Vinh =   1.6500V
Vmeas =  1.3200V
Cref =  10.0pF
Rref =  25.0
C_comp           5.0pF           5.00pF           5.0pF
|
[Model Spec]
Vmeas_rising     0.940           0.8545           1.025   | 0.2848*Vcc
Vmeas_falling    2.030           1.845            2.214   | 0.6151*Vcc
Vref_rising      0.000           0.000            0.000
Vref_falling     3.300           3.000            3.600
|
[Voltage Range]           3.3V             3.3V             3.3V
[Pulldown]
| voltage     I(typ)              I(min)              I(max)
|
-3.3  -1 -1 -1
3.3    1  1  1
|
[Pullup]
| voltage     I(typ)              I(min)              I(max)
|
-3.3   1  1  1
3.3   -1 -1 -1
|
[Ramp]
| variable       typ                 min                 max
dV/dt_r 1.75/1e-9  1.75/1e-9  1.75/1e-9
dV/dt_f 1.75/1e-9  1.75/1e-9  1.75/1e-9
R_load = 25.0  
|
[End]


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******************** BELOW FOR ADMINISTRATION AND TRACKING *******************
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BUG NUMBER:     233

SEVERITY: [FATAL, SEVERE, MODERATE, ANNOYING, ENHANCEMENT]  MODERATE

PRIORITY: [HIGH, MEDIUM, LOW]                               MEDIUM

STATUS: [OPEN, CLOSED, WILL NOT FIX, NOT A BUG]             CLOSED

FIXED VERSION: 7.1.1

FIXED DATE:    November 18, 2022


NOTES ON BUG FIX:
Classified at the May 13, 2022 IBIS Open Forum Meeting
To be fixed in the next release


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