fix(gcode): report the real OS error when G-code export fails#11066
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BenJule wants to merge 1 commit into
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fix(gcode): report the real OS error when G-code export fails#11066BenJule wants to merge 1 commit into
BenJule wants to merge 1 commit into
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The G-code writer only checked ferror() and always threw 'Is the disk full?', discarding the actual errno from the failed fwrite/fflush. On a multi-colour model that produces a multi-GB .gcode the write can fail for several reasons (full temp volume, read-only path, antivirus lock, disk quota) — all reported as 'disk full', which misleads users. Capture errno at the first failed fwrite/fflush in GCodeOutputStream, expose it via get_last_error(), and include strerror() in the export failure message (e.g. 'No space left on device') while keeping the disk-full hint as fallback.
BambulabRobot
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XunZhangBambu
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ArthurBambulab,
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Diatom-Bambu
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Jun 29, 2026
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Thanks for your submission; this certainly makes the error message more detailed.
Diatom-Bambu
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Jun 29, 2026
XunZhangBambu
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Jun 29, 2026
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Problem
When G-code export fails, BambuStudio always shows:
This is guessed, not measured.
GCodeOutputStreamonly checksferror()andGCode::export_gcode()discards the realerrnofrom the failedfwrite/fflush. Large multi-colour models produce multi-GB G-code, and the write can fail for several different reasons — a full temp volume, a read-only path, an antivirus/cloud-sync lock, or a disk quota — all of which are reported identically as 'disk full'. Users (this came from a real 4-colour model export on Windows) are left guessing.Fix
errnoat the first failedfwrite/fflushinGCodeOutputStream.get_last_error()(strerror).errnowas recorded.No behavioural change other than a more accurate error message. Small, self-contained:
src/libslic3r/GCode.cpp+GCode.hpp(+25/-3).