Strange compiling problem (assertion "Balloc succeeded" failed: file "/data/jenkins/w

C

C0d3man

Well-known member
Strange compiling problem (assertion "Balloc succeeded" failed: file "/data/jenkins/w

Hi,

I am working on a new oscillator class for Teensy. The complete code can be cloned via git from here.

While writing some code for precalculating values I tried to run it on a Teensy-3.6. This is the code (can also be found at https://codeberg.org/dcoredump/Synth_Sine_Partial/src/branch/main/examples/Pre_Calculate_Partials/Pre_Calculate_Partials.ino:

Code: 
#include <Arduino.h>
#include <Audio.h>
#include "synth_sine_partial.h"

#define USE_MAX_PARTIALS 30

AudioSynthSineSquare* square;
AudioSynthSineTriangle* triangle;
AudioSynthSineSawtooth* sawtooth;
AudioSynthSineSquareFast* square_fast;
AudioSynthSineTriangleFast* triangle_fast;
AudioSynthSineSawtoothFast* sawtooth_fast;

void setup() {
  char label[32];
  uint16_t i=0;

  Serial.begin(115200);

  Serial.printf("<START>\n");

  // Square
  square = new AudioSynthSineSquare(USE_MAX_PARTIALS);
  square->amplitude(1.0);
  square->begin();
  for (float dc = 0.1; dc <= 1.0; dc += 0.01) {
    snprintf(label, sizeof(label), "square");
    square->set_duty_cycle(dc);
    square->show_partials_compact(label,i);
    i++;
  }

  // Triangle
  triangle = new AudioSynthSineTriangle(USE_MAX_PARTIALS);
  triangle->amplitude(1.0);
  triangle->begin();
  snprintf(label, sizeof(label), "triangle");
  triangle->show_partials_compact(label);

  // Sawtooth
  sawtooth = new AudioSynthSineSawtooth(USE_MAX_PARTIALS);
  sawtooth->amplitude(1.0);
  sawtooth->begin();
  snprintf(label, sizeof(label), "sawtooth");
  sawtooth->show_partials_compact(label);

  // Square Fast
  i=0;
  square_fast = new AudioSynthSineSquareFast(USE_MAX_PARTIALS);
  square_fast->amplitude(1.0);
  square_fast->begin();
  for (float dc = 0.1; dc <= 1.0; dc += 0.01) {
    snprintf(label, sizeof(label), "square_fast");
    square_fast->set_duty_cycle(dc);
    square_fast->show_partials_compact(label,i);
    i++;
  }

  // Triangle Fast
  triangle_fast = new AudioSynthSineTriangleFast(USE_MAX_PARTIALS);
  triangle_fast->amplitude(1.0);
  triangle_fast->begin();
  snprintf(label, sizeof(label), "triangle_fast");
  triangle_fast->show_partials_compact(label);

  // Sawtooth Fast
  sawtooth_fast = new AudioSynthSineSawtoothFast(USE_MAX_PARTIALS);
  sawtooth_fast->amplitude(1.0);
  sawtooth_fast->begin();
  snprintf(label, sizeof(label), "sawtooth_fast");
  sawtooth_fast->show_partials_compact(label);

  Serial.printf("<END>\n");
}

void loop() {
}

... and got a assertion "Balloc succeeded" failed: file "/data/jenkins/workspace/GNU-toolchain/arm-11/src/newlib-cygwin/newlib/libc/stdlib/mprec.c", line 783
Shown on the serial console is:

Code: 
<START>
//
// Precalculated coefficients for square with 29 partials
//
const float square_a[0][USE_PARTIALS+1] = {
#if USE_PARTIALS > 0
assertion "Balloc succeeded" failed: file "/data/jenkins/workspace/GNU-toolchain/arm-11/src/newlib-cygwin/newlib/libc/stdlib/mprec.c", line 783

This error seems to be inside Synth_Sine_Partial/src/synth_sine_partial.cpp line 177, but I cannot see any problem here:

Code: 
...
                PRINTF("//\n// Precalculated coefficients for %s with %d partials\n//\n",label, _max_partials-1);

                if(subindex >= 0)
                        PRINTF("const float %s_a[%d][USE_PARTIALS+1] = {\n",label, subindex);
                else
                        PRINTF("const float %s_a[USE_PARTIALS+1] = {\n",label);

                for(uint8_t i=0;i<=_max_partials;i++)
                {
                        if(fabs(_a[i]) <= 0.00001)
                                _a[i]=0.0;
                        if(i<_max_partials)
                        {
                                PRINTF("#if USE_PARTIALS > %d\n",i);
                                PRINTF("\t%+2.15f, // a[%d]\n",_a[i],i);                 // <======================
                                PRINTF("#endif\n");
                        }
                        else
                                PRINTF("};\n");
                }
...

I "rewrote" the test code from above to use with gcc-11.3.0 from my development system (see files at utils folder) and after
Code: 
make && ./precalculate_partials
everything runs fine.

I am a little bit confused and after searching a long time I cannot find any problem. Is this a compiler problem in the Teensy-toolchain or am I doing something completely wrong?


TIA, Holger
 
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